Label di bawah gambar di UIButton

Saya mencoba membuat tombol yang memiliki beberapa teks di bawah ikon (agak seperti tombol aplikasi) namun tampaknya cukup sulit untuk dicapai. Ada ide bagaimana saya bisa mendapatkan teks untuk ditampilkan di bawah gambar dengan UIButton?

Atau Anda bisa menggunakan kategori ini:

ObjC

@interface UIButton (VerticalLayout)

- (void)centerVerticallyWithPadding:(float)padding;
- (void)centerVertically;

@end

@implementation UIButton (VerticalLayout)

- (void)centerVerticallyWithPadding:(float)padding {
    CGSize imageSize = self.imageView.frame.size;
    CGSize titleSize = self.titleLabel.frame.size;
    CGFloat totalHeight = (imageSize.height + titleSize.height + padding);
    
    self.imageEdgeInsets = UIEdgeInsetsMake(- (totalHeight - imageSize.height),
                                            0.0f,
                                            0.0f,
                                            - titleSize.width);
    
    self.titleEdgeInsets = UIEdgeInsetsMake(0.0f,
                                            - imageSize.width,
                                            - (totalHeight - titleSize.height),
                                            0.0f);
    
    self.contentEdgeInsets = UIEdgeInsetsMake(0.0f,
                                              0.0f,
                                              titleSize.height,
                                              0.0f);
}

- (void)centerVertically {
    const CGFloat kDefaultPadding = 6.0f;
    [self centerVerticallyWithPadding:kDefaultPadding];
}

@end

Ekstensi cepat

extension UIButton {
    
    func centerVertically(padding: CGFloat = 6.0) {
        guard
            let imageViewSize = self.imageView?.frame.size,
            let titleLabelSize = self.titleLabel?.frame.size else {
            return
        }
        
        let totalHeight = imageViewSize.height + titleLabelSize.height + padding
        
        self.imageEdgeInsets = UIEdgeInsets(
            top: -(totalHeight - imageViewSize.height),
            left: 0.0,
            bottom: 0.0,
            right: -titleLabelSize.width
        )
        
        self.titleEdgeInsets = UIEdgeInsets(
            top: 0.0,
            left: -imageViewSize.width,
            bottom: -(totalHeight - titleLabelSize.height),
            right: 0.0
        )
        
        self.contentEdgeInsets = UIEdgeInsets(
            top: 0.0,
            left: 0.0,
            bottom: titleLabelSize.height,
            right: 0.0
        )
    }
    
}

Saran: Jika tinggi tombol kurang dari totalHeight, maka gambar akan menarik batas luar.

imageEdgeInset.top seharusnya:

max(0, -(totalHeight - imageViewSize.height))

Dalam Xcode, Anda cukup mengatur Edge Title Left Inset menjadi negatif lebar gambar. Ini akan menampilkan label di tengah gambar.

Untuk membuat label ditampilkan di bawah gambar (agak seperti tombol aplikasi), Anda mungkin perlu mengatur Inset Judul Ujung Tepi ke beberapa angka positif.

Ini adalah tombol judul terpusat sederhana yang diterapkan di Swift dengan mengesampingkan titleRect(forContentRect:)dan imageRect(forContentRect:). Ini juga mengimplementasikan intrinsicContentSizeuntuk digunakan dengan AutoLayout.

import UIKit

class CenteredButton: UIButton
{
    override func titleRect(forContentRect contentRect: CGRect) -> CGRect {
        let rect = super.titleRect(forContentRect: contentRect)

        return CGRect(x: 0, y: contentRect.height - rect.height + 5,
            width: contentRect.width, height: rect.height)
    }

    override func imageRect(forContentRect contentRect: CGRect) -> CGRect {
        let rect = super.imageRect(forContentRect: contentRect)
        let titleRect = self.titleRect(forContentRect: contentRect)

        return CGRect(x: contentRect.width/2.0 - rect.width/2.0,
            y: (contentRect.height - titleRect.height)/2.0 - rect.height/2.0,
            width: rect.width, height: rect.height)
    }

    override var intrinsicContentSize: CGSize {
        let size = super.intrinsicContentSize

        if let image = imageView?.image {
            var labelHeight: CGFloat = 0.0

            if let size = titleLabel?.sizeThatFits(CGSize(width: self.contentRect(forBounds: self.bounds).width, height: CGFloat.greatestFiniteMagnitude)) {
                labelHeight = size.height
            }

            return CGSize(width: size.width, height: image.size.height + labelHeight + 5)
        }

        return size
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        centerTitleLabel()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        centerTitleLabel()
    }

    private func centerTitleLabel() {
        self.titleLabel?.textAlignment = .center
    }
}

Lihatlah jawaban yang bagus ini di Swift.

extension UIButton {

    func alignImageAndTitleVertically(padding: CGFloat = 6.0) {
        let imageSize = self.imageView!.frame.size
        let titleSize = self.titleLabel!.frame.size
        let totalHeight = imageSize.height + titleSize.height + padding

        self.imageEdgeInsets = UIEdgeInsets(
            top: -(totalHeight - imageSize.height),
            left: 0,
            bottom: 0,
            right: -titleSize.width
        )

        self.titleEdgeInsets = UIEdgeInsets(
            top: 0,
            left: -imageSize.width,
            bottom: -(totalHeight - titleSize.height),
            right: 0
        )
    }

}

Subkelas UIButton. Override - layoutSubviewsuntuk memindahkan built-in subviewske posisi baru:

- (void)layoutSubviews
{
    [super layoutSubviews];

    CGRect frame = self.imageView.frame;
    frame = CGRectMake(truncf((self.bounds.size.width - frame.size.width) / 2), 0.0f, frame.size.width, frame.size.height);
    self.imageView.frame = frame;

    frame = self.titleLabel.frame;
    frame = CGRectMake(truncf((self.bounds.size.width - frame.size.width) / 2), self.bounds.size.height - frame.size.height, frame.size.width, frame.size.height);
    self.titleLabel.frame = frame;
}

Jawaban icecrystal23 yang di-refactored.

Swift 3, bekerja dengan pembayaran otomatis, xib, storyboard, dapat dianimasikan.

Tombol dalam jawaban asli icecrystal23 `s memiliki bingkai yang dihitung dengan buruk. Saya pikir saya sudah memperbaikinya.

Sunting: Diperbarui ke Swift 5 dan membuat pekerjaan di dalam Interface Builder / Storyboards

import UIKit

@IBDesignable
class VerticalButton: UIButton {

    @IBInspectable public var padding: CGFloat = 20.0 {
        didSet {
            setNeedsLayout()
        }
    }

    override var intrinsicContentSize: CGSize {
        let maxSize = CGSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude)

        if let titleSize = titleLabel?.sizeThatFits(maxSize), let imageSize = imageView?.sizeThatFits(maxSize) {
            let width = ceil(max(imageSize.width, titleSize.width))
            let height = ceil(imageSize.height + titleSize.height + padding)

            return CGSize(width: width, height: height)
        }

        return super.intrinsicContentSize
    }

    override func layoutSubviews() {
        if let image = imageView?.image, let title = titleLabel?.attributedText {
            let imageSize = image.size
            let titleSize = title.size()

            titleEdgeInsets = UIEdgeInsets(top: 0.0, left: -imageSize.width, bottom: -(imageSize.height + padding), right: 0.0)
            imageEdgeInsets = UIEdgeInsets(top: -(titleSize.height + padding), left: 0.0, bottom: 0.0, right: -titleSize.width)
        }

        super.layoutSubviews()
    }

}

mengoreksi salah satu jawaban di sini:

Swift 3:

class CenteredButton: UIButton
{
    override func titleRect(forContentRect contentRect: CGRect) -> CGRect {
        let rect = super.titleRect(forContentRect: contentRect)
        let imageRect = super.imageRect(forContentRect: contentRect)

        return CGRect(x: 0, y: imageRect.maxY + 10,
                      width: contentRect.width, height: rect.height)
    }

    override func imageRect(forContentRect contentRect: CGRect) -> CGRect {
        let rect = super.imageRect(forContentRect: contentRect)
        let titleRect = self.titleRect(forContentRect: contentRect)

        return CGRect(x: contentRect.width/2.0 - rect.width/2.0,
                      y: (contentRect.height - titleRect.height)/2.0 - rect.height/2.0,
                      width: rect.width, height: rect.height)
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        centerTitleLabel()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        centerTitleLabel()
    }

    private func centerTitleLabel() {
        self.titleLabel?.textAlignment = .center
    }
}

Ini adalah versi modifikasi dari jawaban luar biasa Erik W. Tetapi alih-alih menempatkan gambar yang berpusat di TOP tampilan, itu menempatkan gambar dan label yang berpusat di tampilan sebagai grup.

Perbedaannya adalah:

+-----------+
|    ( )    |
|   Hello   |     // Erik W's code
|           |
|           |
+-----------+

vs.

+-----------+
|           |
|    ( )    |     // My modified version
|   Hello   |
|           |
+-----------+

Sumber di bawah ini:

-(void)layoutSubviews {
    [super layoutSubviews];

    CGRect titleLabelFrame = self.titleLabel.frame;
    CGSize labelSize = [self.titleLabel.text sizeWithFont:self.titleLabel.font constrainedToSize:CGSizeMake(self.frame.size.width, CGFLOAT_MAX) lineBreakMode:NSLineBreakByWordWrapping];

    CGRect imageFrame = self.imageView.frame;

    CGSize fitBoxSize = (CGSize){.height = labelSize.height + kTextTopPadding +  imageFrame.size.height, .width = MAX(imageFrame.size.width, labelSize.width)};

    CGRect fitBoxRect = CGRectInset(self.bounds, (self.bounds.size.width - fitBoxSize.width)/2, (self.bounds.size.height - fitBoxSize.height)/2);

    imageFrame.origin.y = fitBoxRect.origin.y;
    imageFrame.origin.x = CGRectGetMidX(fitBoxRect) - (imageFrame.size.width/2);
    self.imageView.frame = imageFrame;

    // Adjust the label size to fit the text, and move it below the image

    titleLabelFrame.size.width = labelSize.width;
    titleLabelFrame.size.height = labelSize.height;
    titleLabelFrame.origin.x = (self.frame.size.width / 2) - (labelSize.width / 2);
    titleLabelFrame.origin.y = fitBoxRect.origin.y + imageFrame.size.height + kTextTopPadding;
    self.titleLabel.frame = titleLabelFrame;
}

FYI: Ini bisa pecah ketika dikombinasikan dengan animasi UIView, karena layoutSubviews dipanggil selama mereka.

Solusi Dave di Swift:

override func layoutSubviews() {
    super.layoutSubviews()
    if let imageView = self.imageView {
        imageView.frame.origin.x = (self.bounds.size.width - imageView.frame.size.width) / 2.0
        imageView.frame.origin.y = 0.0
    }
    if let titleLabel = self.titleLabel {
        titleLabel.frame.origin.x = (self.bounds.size.width - titleLabel.frame.size.width) / 2.0
        titleLabel.frame.origin.y = self.bounds.size.height - titleLabel.frame.size.height
    }
}

Jika Anda subkelas UIButtondan override layoutSubviews, Anda dapat menggunakan di bawah ini untuk memusatkan gambar dan menempatkan judul yang berpusat di bawahnya:

kTextTopPadding adalah konstanta yang harus Anda perkenalkan yang menentukan jarak antara gambar dan teks di bawahnya.

-(void)layoutSubviews {
    [super layoutSubviews];

    // Move the image to the top and center it horizontally
    CGRect imageFrame = self.imageView.frame;
    imageFrame.origin.y = 0;
    imageFrame.origin.x = (self.frame.size.width / 2) - (imageFrame.size.width / 2);
    self.imageView.frame = imageFrame;

    // Adjust the label size to fit the text, and move it below the image
    CGRect titleLabelFrame = self.titleLabel.frame;
    CGSize labelSize = [self.titleLabel.text sizeWithFont:self.titleLabel.font
                                        constrainedToSize:CGSizeMake(self.frame.size.width, CGFLOAT_MAX)
                                        lineBreakMode:NSLineBreakByWordWrapping];
    titleLabelFrame.size.width = labelSize.width;
    titleLabelFrame.size.height = labelSize.height;
    titleLabelFrame.origin.x = (self.frame.size.width / 2) - (labelSize.width / 2);
    titleLabelFrame.origin.y = self.imageView.frame.origin.y + self.imageView.frame.size.height + kTextTopPadding;
    self.titleLabel.frame = titleLabelFrame;

}

Diperbarui jawaban Kenny Winker karena sizeWithFont sudah tidak digunakan lagi di iOS 7.

-(void)layoutSubviews {
[super layoutSubviews];

int kTextTopPadding = 3;

CGRect titleLabelFrame = self.titleLabel.frame;

CGRect labelSize = [self.titleLabel.text boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, CGRectGetHeight(self.bounds)) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:self.titleLabel.font} context:nil];

CGRect imageFrame = self.imageView.frame;

CGSize fitBoxSize = (CGSize){.height = labelSize.size.height + kTextTopPadding +  imageFrame.size.height, .width = MAX(imageFrame.size.width, labelSize.size.width)};

CGRect fitBoxRect = CGRectInset(self.bounds, (self.bounds.size.width - fitBoxSize.width)/2, (self.bounds.size.height - fitBoxSize.height)/2);

imageFrame.origin.y = fitBoxRect.origin.y;
imageFrame.origin.x = CGRectGetMidX(fitBoxRect) - (imageFrame.size.width/2);
self.imageView.frame = imageFrame;

// Adjust the label size to fit the text, and move it below the image

titleLabelFrame.size.width = labelSize.size.width;
titleLabelFrame.size.height = labelSize.size.height;
titleLabelFrame.origin.x = (self.frame.size.width / 2) - (labelSize.size.width / 2);
titleLabelFrame.origin.y = fitBoxRect.origin.y + imageFrame.size.height + kTextTopPadding;
self.titleLabel.frame = titleLabelFrame;
}

Di iOS 11 / Swift 4 tidak ada jawaban di atas yang benar-benar berfungsi untuk saya. Saya menemukan beberapa contoh dan memutarkannya:

extension UIButton {

    func centerImageAndButton(_ gap: CGFloat, imageOnTop: Bool) {

      guard let imageView = self.currentImage,
      let titleLabel = self.titleLabel?.text else { return }

      let sign: CGFloat = imageOnTop ? 1 : -1
      self.titleEdgeInsets = UIEdgeInsetsMake((imageView.size.height + gap) * sign, -imageView.size.width, 0, 0);

      let titleSize = titleLabel.size(withAttributes:[NSAttributedStringKey.font: self.titleLabel!.font!])
      self.imageEdgeInsets = UIEdgeInsetsMake(-(titleSize.height + gap) * sign, 0, 0, -titleSize.width)
    }
}

Semoga ini bisa membantu seseorang.

Menggunakan kode Kenny Winker dan simeon saya membuat kode cepat ini yang berfungsi untuk saya.

import UIKit

@IBDesignable
class TopIconButton: UIButton {
    override func layoutSubviews() {
        super.layoutSubviews()

        let kTextTopPadding:CGFloat = 3.0;

        var titleLabelFrame = self.titleLabel!.frame;


        let labelSize = titleLabel!.sizeThatFits(CGSizeMake(CGRectGetWidth(self.contentRectForBounds(self.bounds)), CGFloat.max))

        var imageFrame = self.imageView!.frame;

        let fitBoxSize = CGSizeMake(max(imageFrame.size.width, labelSize.width), labelSize.height + kTextTopPadding + imageFrame.size.    height)

        let fitBoxRect = CGRectInset(self.bounds, (self.bounds.size.width - fitBoxSize.width)/2, (self.bounds.size.height - fitBoxSize.    height)/2);

        imageFrame.origin.y = fitBoxRect.origin.y;
        imageFrame.origin.x = CGRectGetMidX(fitBoxRect) - (imageFrame.size.width/2);
        self.imageView!.frame = imageFrame;

        // Adjust the label size to fit the text, and move it below the image

        titleLabelFrame.size.width = labelSize.width;
        titleLabelFrame.size.height = labelSize.height;
        titleLabelFrame.origin.x = (self.frame.size.width / 2) - (labelSize.width / 2);
        titleLabelFrame.origin.y = fitBoxRect.origin.y + imageFrame.size.height + kTextTopPadding;
        self.titleLabel!.frame = titleLabelFrame;
        self.titleLabel!.textAlignment = .Center
    }

}

Anda hanya perlu menyesuaikan ketiga inset tepi berdasarkan ukuran gambar dan label judul Anda:

button.contentEdgeInsets = UIEdgeInsetsMake(0, 0, titleLabelBounds.height + 4, 0)
button.titleEdgeInsets = UIEdgeInsetsMake(image.size.height + 8, -image.size.width, 0, 0)
button.imageEdgeInsets = UIEdgeInsetsMake(0, 0, 0, -titleLabelBounds.width)

Anda bisa mendapatkan batasan label judul dengan memanggil sizeToFit setelah mengatur teksnya. Spasi horizontal harus bekerja terlepas dari ukuran teks, font dan gambar, tetapi saya tidak tahu satu solusi untuk mendapatkan spasi vertikal dan inset tepi bawah konsisten.

Inilah jawaban "Bear With Me" sebagai subclass di Swift 2.0. Untuk menggunakannya cukup ubah kelas tombol Anda Interface Builderke VerticalButtondan itu akan secara ajaib memperbarui pratinjau.

Saya juga memperbaruinya untuk menghitung ukuran konten intrinsik yang benar untuk pembayaran otomatis.

import UIKit

@IBDesignable

class VerticalButton: UIButton {
    @IBInspectable var padding: CGFloat = 8

    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()

        update()
    }

    override func layoutSubviews() {
        super.layoutSubviews()

        update()
    }

    func update() {
        let imageBounds = self.imageView!.bounds
        let titleBounds = self.titleLabel!.bounds
        let totalHeight = CGRectGetHeight(imageBounds) + padding + CGRectGetHeight(titleBounds)

        self.imageEdgeInsets = UIEdgeInsets(
            top: -(totalHeight - CGRectGetHeight(imageBounds)),
            left: 0,
            bottom: 0,
            right: -CGRectGetWidth(titleBounds)
        )

        self.titleEdgeInsets = UIEdgeInsets(
            top: 0,
            left: -CGRectGetWidth(imageBounds),
            bottom: -(totalHeight - CGRectGetHeight(titleBounds)),
            right: 0
        )
    }

    override func intrinsicContentSize() -> CGSize {
        let imageBounds = self.imageView!.bounds
        let titleBounds = self.titleLabel!.bounds

        let width = CGRectGetWidth(imageBounds) > CGRectGetWidth(titleBounds) ? CGRectGetWidth(imageBounds) : CGRectGetWidth(titleBounds)
        let height = CGRectGetHeight(imageBounds) + padding + CGRectGetHeight(titleBounds)

        return CGSizeMake(width, height)
    }
}

@Tiago Saya mengubah jawaban Anda seperti ini. Ini berfungsi dengan baik dengan semua ukuran

func alignImageAndTitleVertically(padding: CGFloat = 5.0) {
        self.sizeToFit()
        let imageSize = self.imageView!.frame.size
        let titleSize = self.titleLabel!.frame.size
        let totalHeight = imageSize.height + titleSize.height + padding

        self.imageEdgeInsets = UIEdgeInsets(
            top: -(totalHeight - imageSize.height),
            left: 0,
            bottom: 0,
            right: -titleSize.width
        )

        self.titleEdgeInsets = UIEdgeInsets(
            top: 0,
            left: 0,
            bottom: -(totalHeight - titleSize.height),
            right: titleSize.height
        )
    }

Saya mengambil kombinasi jawaban di sini dan muncul dengan jawaban yang sepertinya cocok untuk saya, di Swift. Saya tidak suka bagaimana saya hanya mengesampingkan insets, tetapi berhasil. Saya akan terbuka untuk perbaikan yang disarankan dalam komentar. Tampaknya berfungsi dengan baik dengan sizeToFit()dan dengan tata letak otomatis.

import UIKit

/// A button that displays an image centered above the title.  This implementation 
/// only works when both an image and title are set, and ignores
/// any changes you make to edge insets.
class CenteredButton: UIButton
{
    let padding: CGFloat = 0.0

    override func layoutSubviews() {
        if imageView?.image != nil && titleLabel?.text != nil {
            let imageSize: CGSize = imageView!.image!.size
            titleEdgeInsets = UIEdgeInsetsMake(0.0, -imageSize.width, -(imageSize.height + padding), 0.0)
            let labelString = NSString(string: titleLabel!.text!)
            let titleSize = labelString.sizeWithAttributes([NSFontAttributeName: titleLabel!.font])
            imageEdgeInsets = UIEdgeInsetsMake(-(titleSize.height + padding), 0.0, 0.0, -titleSize.width)
            let edgeOffset = abs(titleSize.height - imageSize.height) / 2.0;
            contentEdgeInsets = UIEdgeInsetsMake(edgeOffset, 0.0, edgeOffset, 0.0)
        }
        super.layoutSubviews()
    }

    override func sizeThatFits(size: CGSize) -> CGSize {
        let defaultSize = super.sizeThatFits(size)
        if let titleSize = titleLabel?.sizeThatFits(size),
        let imageSize = imageView?.sizeThatFits(size) {
            return CGSize(width: ceil(max(imageSize.width, titleSize.width)), height: ceil(imageSize.height + titleSize.height + padding))
        }
        return defaultSize
    }

    override func intrinsicContentSize() -> CGSize {
        let size = sizeThatFits(CGSize(width: CGFloat.max, height: CGFloat.max))
        return size
    }
}

Gunakan dua metode ini:

func titleRect(forContentRect contentRect: CGRect) -> CGRect
func imageRect(forContentRect contentRect: CGRect) -> CGRect

Contoh:

class VerticalButton: UIButton {

  override func titleRect(forContentRect contentRect: CGRect) -> CGRect {
    let titleRect = super.titleRect(forContentRect: contentRect)
    let imageRect = super.imageRect(forContentRect: contentRect)

    return CGRect(x: 0,
                  y: contentRect.height - (contentRect.height - padding - imageRect.size.height - titleRect.size.height) / 2 - titleRect.size.height,
                  width: contentRect.width,
                  height: titleRect.height)
  }

  override func imageRect(forContentRect contentRect: CGRect) -> CGRect {
    let imageRect = super.imageRect(forContentRect: contentRect)
    let titleRect = self.titleRect(forContentRect: contentRect)

    return CGRect(x: contentRect.width/2.0 - imageRect.width/2.0,
                  y: (contentRect.height - padding - imageRect.size.height - titleRect.size.height) / 2,
                  width: imageRect.width,
                  height: imageRect.height)
  }

  private let padding: CGFloat
  init(padding: CGFloat) {
    self.padding = padding

    super.init(frame: .zero)
    self.titleLabel?.textAlignment = .center
  }

  required init?(coder aDecoder: NSCoder) { fatalError() }
}

extension UIButton {

  static func vertical(padding: CGFloat) -> UIButton {
    return VerticalButton(padding: padding)
  }
}

Dan Anda dapat menggunakan:

let myButton = UIButton.vertical(padding: 6)

Metode Swift 5 - di bawah ini berfungsi untuk saya

func centerVerticallyWithPadding(padding : CGFloat) {
        guard
            let imageViewSize = self.imageView?.frame.size,
            let titleLabelSize = self.titleLabel?.frame.size else {
            return
        }

        let totalHeight = imageViewSize.height + titleLabelSize.height + padding

        self.imageEdgeInsets = UIEdgeInsets(
            top: max(0, -(totalHeight - imageViewSize.height)),
            left: 0.0,
            bottom: 0.0,
            right: -titleLabelSize.width
        )

        self.titleEdgeInsets = UIEdgeInsets(
            top: (totalHeight - imageViewSize.height),
            left: -imageViewSize.width,
            bottom: -(totalHeight - titleLabelSize.height),
            right: 0.0
        )

        self.contentEdgeInsets = UIEdgeInsets(
            top: 0.0,
            left: 0.0,
            bottom: titleLabelSize.height,
            right: 0.0
        )
    }

Pastikan judul tombol Anda tidak terpotong di storyboard / xib lain pergi untuk
Solusi 2

class SVVerticalButton: UIButton {

    override func layoutSubviews() {
        super.layoutSubviews()
        let padding : CGFloat = 2.0
        if let imageView = self.imageView {
            imageView.frame.origin.x = (self.bounds.size.width - imageView.frame.size.width) / 2.0
            imageView.frame.origin.y = max(0,(self.bounds.size.height - (imageView.frame.size.height + (titleLabel?.frame.size.height ?? 0.0) + padding)) / 2.0)
        }
        if let titleLabel = self.titleLabel {
            titleLabel.frame.origin.x = 0
            titleLabel.frame.origin.y = self.bounds.size.height - titleLabel.frame.size.height
            titleLabel.frame.size.width = self.bounds.size.width
            titleLabel.textAlignment = .center
        }
    }

}

Saya pikir salah satu cara terbaik untuk melakukannya adalah dengan mengelompokkan UIButton dan mengganti beberapa metode rendering:

- (void)awakeFromNib
{
    [super awakeFromNib];
    [self setupSubViews];
}

- (instancetype)init
{
    if (self = [super init])
    {
        [self setupSubViews];
    }
    return self;
}

- (void)setupSubViews
{
    [self.imageView setTranslatesAutoresizingMaskIntoConstraints:NO];
    [self addConstraint:[NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self.imageView attribute:NSLayoutAttributeCenterX multiplier:1 constant:0]];
    [self.titleLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
    [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[imageView][titleLabel]|" options:NSLayoutFormatAlignAllCenterX metrics:nil views:@{@"imageView": self.imageView, @"titleLabel": self.titleLabel}]];
}

- (CGSize)intrinsicContentSize
{
    CGSize imageSize = self.imageView.image.size;
    CGSize titleSize = [self.titleLabel.text sizeWithAttributes:@{NSFontAttributeName: self.titleLabel.font}];
    return CGSizeMake(MAX(imageSize.width, titleSize.width), imageSize.height + titleSize.height);
}

Saya menemukan bahwa jawaban Simeon mungkin yang terbaik tetapi memberi saya hasil yang aneh pada beberapa tombol dan saya tidak tahu mengapa. Jadi dengan menggunakan jawabannya sebagai basis saya menerapkan tombol saya seperti di bawah ini:

#define PADDING 2.0f

@implementation OOButtonVerticalImageText

-(CGSize) intrinsicContentSize {
  CGSize size = [super intrinsicContentSize];
  CGFloat labelHeight = 0.0f;
  CGSize titleSize = [self.titleLabel sizeThatFits:CGSizeMake([self contentRectForBounds:self.bounds].size.width, CGFLOAT_MAX)];
  labelHeight = titleSize.height;
  return CGSizeMake(MAX(titleSize.width, self.imageView.image.size.width), self.imageView.image.size.height + labelHeight + PADDING);
}

-(void) layoutSubviews {
  [super layoutSubviews];

  CGSize titleSize = [self.titleLabel sizeThatFits:CGSizeMake([self contentRectForBounds:self.bounds].size.width, CGFLOAT_MAX)];
  self.titleLabel.frame = CGRectMake((self.bounds.size.width - titleSize.width)/2.0f,
                                     self.bounds.size.height - titleSize.height - PADDING,
                                     titleSize.width,
                                     titleSize.height);

  CGSize ivSize = self.imageView.frame.size;
  self.imageView.frame = CGRectMake((self.bounds.size.width - ivSize.width)/2.0f,
                                    self.titleLabel.frame.origin.y - ivSize.height - PADDING,
                                    ivSize.width,
                                    ivSize.height);
}

@end

Inilah subkelas saya UIButtonyang memecahkan masalah ini:

@implementation MyVerticalButton

@synthesize titleAtBottom; // BOOL property

- (id)initWithFrame:(CGRect)frame
{
  self = [super initWithFrame:frame];
  if (self) {
    self.titleAtBottom = YES;
  }
  return self;
}

- (CGSize)sizeThatFits:(CGSize)size {
  self.titleLabel.text = [self titleForState: self.state];

  UIEdgeInsets imageInsets = self.imageEdgeInsets;
  UIEdgeInsets titleInsets = self.titleEdgeInsets;

  CGSize imageSize = [self imageForState: self.state].size;
  if (!CGSizeEqualToSize(imageSize, CGSizeZero)) {
    imageSize.width += imageInsets.left + imageInsets.right;
    imageSize.height += imageInsets.top + imageInsets.bottom;

  }

  CGSize textSize = [self.titleLabel sizeThatFits: CGSizeMake(size.width - titleInsets.left - titleInsets.right,
                                                              size.height -(imageSize.width +
                                                                            titleInsets.top+titleInsets.bottom))];
  if (!CGSizeEqualToSize(textSize, CGSizeZero)) {
    textSize.width += titleInsets.left + titleInsets.right;
    textSize.height += titleInsets.top + titleInsets.bottom;
  }

  CGSize result = CGSizeMake(MAX(textSize.width, imageSize.width),
                             textSize.height + imageSize.height);
  return result;
}

- (void)layoutSubviews {
  // needed to update all properities of child views:
  [super layoutSubviews];

  CGRect bounds = self.bounds;

  CGRect titleFrame = UIEdgeInsetsInsetRect(bounds, self.titleEdgeInsets);
  CGRect imageFrame = UIEdgeInsetsInsetRect(bounds, self.imageEdgeInsets);
  if (self.titleAtBottom) {
    CGFloat titleHeight = [self.titleLabel sizeThatFits: titleFrame.size].height;
    titleFrame.origin.y = CGRectGetMaxY(titleFrame)-titleHeight;
    titleFrame.size.height = titleHeight;
    titleFrame = CGRectStandardize(titleFrame);
    self.titleLabel.frame = titleFrame;

    CGFloat imageBottom = CGRectGetMinY(titleFrame)-(self.titleEdgeInsets.top+self.imageEdgeInsets.bottom);
    imageFrame.size.height = imageBottom - CGRectGetMinY(imageFrame);
    self.imageView.frame = CGRectStandardize(imageFrame);
  } else {
    CGFloat titleHeight = [self.titleLabel sizeThatFits: titleFrame.size].height;
    titleFrame.size.height = titleHeight;
    titleFrame = CGRectStandardize(titleFrame);
    self.titleLabel.frame = titleFrame;

    CGFloat imageTop = CGRectGetMaxY(titleFrame)+(self.titleEdgeInsets.bottom+self.imageEdgeInsets.top);
    imageFrame.size.height = CGRectGetMaxY(imageFrame) - imageTop;
    self.imageView.frame = CGRectStandardize(imageFrame);
  }
}

- (void)setTitleAtBottom:(BOOL)newTitleAtBottom {
  if (titleAtBottom!=newTitleAtBottom) {
    titleAtBottom=newTitleAtBottom;
    [self setNeedsLayout];
  }
}

@end

Itu dia. Bekerja seperti pesona. Masalah dapat muncul jika tombol akan menjadi kecil agar sesuai dengan judul dan teks.

@ simeon ini solusi di Objective-C

#import "CenteredButton.h"

@implementation CenteredButton

- (CGRect)titleRectForContentRect:(CGRect)contentRect
{
    CGRect rect = [super titleRectForContentRect: contentRect];
    return CGRectMake(0,
                      contentRect.size.height - rect.size.height - 5,
                      contentRect.size.width,
                      rect.size.height);
}

- (CGRect)imageRectForContentRect:(CGRect)contentRect
{
    CGRect rect = [super imageRectForContentRect: contentRect];
    CGRect titleRect = [self titleRectForContentRect: contentRect];

    return CGRectMake(contentRect.size.width / 2.0 - rect.size.width / 2.0,
                      (contentRect.size.height - titleRect.size.height)/2.0 - rect.size.height/2.0,
                      rect.size.width,
                      rect.size.height);
}

- (CGSize)intrinsicContentSize {
    CGSize imageSize = [super intrinsicContentSize];

    if (self.imageView.image) {
        UIImage* image = self.imageView.image;
        CGFloat labelHeight = 0.0;

        CGSize labelSize = [self.titleLabel sizeThatFits: CGSizeMake([self contentRectForBounds: self.bounds].size.width, CGFLOAT_MAX)];
        if (CGSizeEqualToSize(imageSize, labelSize)) {
            labelHeight = imageSize.height;
        }

        return CGSizeMake(MAX(labelSize.width, imageSize.width), image.size.height + labelHeight + 5);
    }

    return imageSize;
}

- (id) initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
     if (self) {
         [self centerTitleLabel];
     }
    return self;

}

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self centerTitleLabel];
    }
    return self;
}

- (void)centerTitleLabel {
    self.titleLabel.textAlignment = NSTextAlignmentCenter;
}

@end

Jika Anda menggunakan font khusus , perhitungan untuk ukuran titleLabel tidak akan berfungsi dengan baik, Anda harus menggantinya dengan

let titleLabelSize = self.titleLabel?.text?.size(withAttributes: [NSAttributedStringKey.font: self.titleLabel!.font!])

Alih-alih melalui neraka mencoba untuk memposisikan ikon dan teks dengan insets tepi, Anda bisa membuat NSAttributedString dengan gambar Anda sebagai lampiran dan mengaturnya ke judul yang dikaitkan tombol Anda sebagai gantinya:

let titleText = NSAttributedString(string: yourTitle, attributes: attributes)
let imageAttachment = NSTextAttachment()
imageAttachment.image = yourImage

let title = NSMutableAttributedString(string: "")
title.append(NSAttributedString(attachment: imageAttachment))
title.append(titleText)

button.setAttributedTitle(title, for: .normal)

Solusi Ramah Lokalisasi:

Begitu banyak solusi hebat, tetapi saya ingin menambahkan catatan di sini untuk mereka yang menggunakan lokalisasi.

Anda perlu membalikkan nilai EdgeInstets kiri dan kanan untuk mendapatkan tombol yang ditata dengan benar jika terjadi perubahan arah bahasa dari LtR ke RtL.

Menggunakan solusi serupa saya akan menerapkannya sebagai berikut:

extension UIButton {

    func alignVertical(spacing: CGFloat, lang: String) {
        guard let imageSize = self.imageView?.image?.size,
            let text = self.titleLabel?.text,
            let font = self.titleLabel?.font
        else { return }

        let labelString = NSString(string: text)
        let titleSize = labelString.size(
            withAttributes: [NSAttributedString.Key.font: font]
        )

        var titleLeftInset: CGFloat = -imageSize.width
        var titleRigtInset: CGFloat = 0.0

        var imageLeftInset: CGFloat = 0.0
        var imageRightInset: CGFloat = -titleSize.width

        if Locale.current.languageCode! != "en" { // If not Left to Right language
            titleLeftInset = 0.0
            titleRigtInset = -imageSize.width

            imageLeftInset = -titleSize.width
            imageRightInset = 0.0
        }

        self.titleEdgeInsets = UIEdgeInsets(
            top: 0.0,
            left: titleLeftInset,
            bottom: -(imageSize.height + spacing),
            right: titleRigtInset
        )
        self.imageEdgeInsets = UIEdgeInsets(
            top: -(titleSize.height + spacing),
            left: imageLeftInset,
            bottom: 0.0,
            right: imageRightInset
        )
        let edgeOffset = abs(titleSize.height - imageSize.height) / 2.0;
        self.contentEdgeInsets = UIEdgeInsets(
            top: edgeOffset,
            left: 0.0,
            bottom: edgeOffset,
            right: 0.0
        )
    }
}

Tombol gambar atas dan judul bawah dengan subkelas UIButton

class VerticalButton: UIButton {
  override func layoutSubviews() {
    super.layoutSubviews()
    let padding: CGFloat = 8
    let iH = imageView?.frame.height ?? 0
    let tH = titleLabel?.frame.height ?? 0
    let v: CGFloat = (frame.height - iH - tH - padding) / 2
    if let iv = imageView {
      let x = (frame.width - iv.frame.width) / 2
      iv.frame.origin.y = v
      iv.frame.origin.x = x
    }

    if let tl = titleLabel {
      let x = (frame.width - tl.frame.width) / 2
      tl.frame.origin.y = frame.height - tl.frame.height - v
      tl.frame.origin.x = x
    }
  }
}

Itu jelas merupakan kerja keras untuk pertanyaan ini, namun ... Dalam salah satu proyek saya, saya pertama kali harus menerapkan tombol dengan ikon selaras paling kiri. Lalu kami mendapat tombol lain dengan judul di bawah gambar. Saya mencari solusi yang sudah ada tetapi tidak berhasil. Jadi, ini dia tombol alignable:

@IBDesignable
class AlignableButton: UIButton {

override class var requiresConstraintBasedLayout: Bool {
    return true
}

@objc enum IconAlignment: Int {
    case top, left, right, bottom
}

// MARK: - Designables
@IBInspectable var iconAlignmentValue: Int {
    set {
        iconAlignment = IconAlignment(rawValue: newValue) ?? .left
    }
    get {
        return iconAlignment.rawValue
    }
}

var iconAlignment: IconAlignment = .left

@IBInspectable var titleAlignmentValue: Int {
    set {
        titleAlignment = NSTextAlignment(rawValue: newValue) ?? .left
    }
    get {
        return titleAlignment.rawValue
    }
}

var titleAlignment: NSTextAlignment = .left

// MARK: - Corner Radius
@IBInspectable
var cornerRadius: CGFloat {
    get {
        return layer.cornerRadius
    }
    set {
        layer.masksToBounds = (newValue != 0)
        layer.cornerRadius = newValue
    }
}

// MARK: - Content size
override var intrinsicContentSize: CGSize {
    
    switch iconAlignment {
    case .top, .bottom:
        return verticalAlignedIntrinsicContentSize
    
    default:
        return super.intrinsicContentSize
    }
}

private var verticalAlignedIntrinsicContentSize: CGSize {
    
    if let imageSize = imageView?.intrinsicContentSize,
        let labelSize = titleLabel?.intrinsicContentSize {
        
        let width = max(imageSize.width, labelSize.width) + contentEdgeInsets.left + contentEdgeInsets.right
        let height = imageSize.height + labelSize.height + contentEdgeInsets.top + contentEdgeInsets.bottom
        
        return CGSize(
            width: ceil(width),
            height: ceil(height)
        )
    }
    
    return super.intrinsicContentSize
}

// MARK: - Image Rect
override func imageRect(forContentRect contentRect: CGRect) -> CGRect {
    
    switch iconAlignment {
    case .top:
        return topAlignedImageRect(forContentRect: contentRect)
    case .bottom:
        return bottomAlignedImageRect(forContentRect: contentRect)
    case .left:
        return leftAlignedImageRect(forContentRect: contentRect)
    case .right:
        return rightAlignedImageRect(forContentRect: contentRect)
    }
}

func topAlignedImageRect(forContentRect contentRect: CGRect) -> CGRect {
    let rect = super.imageRect(forContentRect: contentRect)
    
    let x = (contentRect.width - rect.width) / 2.0 + contentRect.minX
    let y = contentRect.minY
    let w = rect.width
    let h = rect.height
    
    return CGRect(
        x: x,
        y: y,
        width: w,
        height: h
    ).inset(by: imageEdgeInsets)
}

func bottomAlignedImageRect(forContentRect contentRect: CGRect) -> CGRect {
    let rect = super.imageRect(forContentRect: contentRect)
    
    let x = (contentRect.width - rect.width) / 2.0 + contentRect.minX
    let y = contentRect.height - rect.height + contentRect.minY
    let w = rect.width
    let h = rect.height
    
    return CGRect(
        x: x,
        y: y,
        width: w,
        height: h
    ).inset(by: imageEdgeInsets)
}

func leftAlignedImageRect(forContentRect contentRect: CGRect) -> CGRect {
    let rect = super.imageRect(forContentRect: contentRect)
    
    let x = contentRect.minX
    let y = (contentRect.height - rect.height) / 2 + contentRect.minY
    let w = rect.width
    let h = rect.height
    
    return CGRect(
        x: x,
        y: y,
        width: w,
        height: h
    ).inset(by: imageEdgeInsets)
}

func rightAlignedImageRect(forContentRect contentRect: CGRect) -> CGRect {
    let rect = super.imageRect(forContentRect: contentRect)
    
    let x = (contentRect.width - rect.width) + contentRect.minX
    let y = (contentRect.height - rect.height) / 2 + contentRect.minY
    let w = rect.width
    let h = rect.height
    
    return CGRect(
        x: x,
        y: y,
        width: w,
        height: h
    ).inset(by: imageEdgeInsets)
}

// MARK: - Title Rect
override func titleRect(forContentRect contentRect: CGRect) -> CGRect {
    
    switch iconAlignment {
    case .top:
        return topAlignedTitleRect(forContentRect: contentRect)
    case .bottom:
        return bottomAlignedTitleRect(forContentRect: contentRect)
    case .left:
        return leftAlignedTitleRect(forContentRect: contentRect)
    case .right:
        return rightAlignedTitleRect(forContentRect: contentRect)
    }
}

func topAlignedTitleRect(forContentRect contentRect: CGRect) -> CGRect {
    
    let rect = super.titleRect(forContentRect: contentRect)

    let x = contentRect.minX
    let y = contentRect.height - rect.height + contentRect.minY
    let w = contentRect.width
    let h = rect.height
    
    return CGRect(
        x: x,
        y: y,
        width: w,
        height: h
    ).inset(by: titleEdgeInsets)
}

func bottomAlignedTitleRect(forContentRect contentRect: CGRect) -> CGRect {
    
    let rect = super.titleRect(forContentRect: contentRect)
    
    let x = contentRect.minX
    let y = contentRect.minY
    let w = contentRect.width
    let h = rect.height
    
    return CGRect(
        x: x,
        y: y,
        width: w,
        height: h
    ).inset(by: titleEdgeInsets)
}

func leftAlignedTitleRect(forContentRect contentRect: CGRect) -> CGRect {
    
    let titleRect = super.titleRect(forContentRect: contentRect)
    let imageRect = self.imageRect(forContentRect: contentRect)
    
    let x = imageRect.width + imageRect.minX
    let y = (contentRect.height - titleRect.height) / 2.0 + contentRect.minY
    let w = contentRect.width - imageRect.width * 2.0
    let h = titleRect.height
    
    return CGRect(
        x: x,
        y: y,
        width: w,
        height: h
    ).inset(by: titleEdgeInsets)
}

func rightAlignedTitleRect(forContentRect contentRect: CGRect) -> CGRect {
    
    let titleRect = super.titleRect(forContentRect: contentRect)
    let imageRect = self.imageRect(forContentRect: contentRect)

    let x = contentRect.minX + imageRect.width
    let y = (contentRect.height - titleRect.height) / 2.0 + contentRect.minY
    let w = contentRect.width - imageRect.width * 2.0
    let h = titleRect.height
    
    return CGRect(
        x: x,
        y: y,
        width: w,
        height: h
    ).inset(by: titleEdgeInsets)
}

// MARK: - Lifecycle
override func awakeFromNib() {
    super.awakeFromNib()
    
    titleLabel?.textAlignment = titleAlignment
}

override func prepareForInterfaceBuilder() {
    super.prepareForInterfaceBuilder()
    
    titleLabel?.textAlignment = titleAlignment
}
}