Question

我想在两行文字左侧放置一个图标，使图像与文本开头之间的空间大约为2-3像素。控件本身是水平居中对齐的（通过Interface Builder设置）

按钮类似于以下内容：

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我正在尝试使用contentEdgeInset，imageEdgeInsets和titleEdgeInsets配置此功能无济于事。我知道负值会扩大边缘，而正值会使其缩小以使其更接近中心。

我试过了：

[button setTitleEdgeInsets:UIEdgeInsetsMake(0, -image.size.width, 0, 0)];
[button setImageEdgeInsets:UIEdgeInsetsMake(0, button.titleLabel.bounds.size.width, 0, 0)];

但这不能正确显示。我一直在调整这些值，但是从左边的插入值开始说-5到-10似乎没有按照预期的方式移动它。 -10会将文本一直向左移动，所以我预计-5会将它从左侧拉出一半，但事实并非如此。

插图背后的逻辑是什么？我不熟悉图像展示位置和相关术语。

我使用这个SO问题作为参考，但关于我的价值观的事情是不对的。 UIButton: how to center an image and a text using imageEdgeInsets and titleEdgeInsets?

Answer 1

我同意imageEdgeInsets和titleEdgeInsets上的文档应该更好，但我想出了如何在不诉诸反复试验的情况下获得正确的定位。

一般的想法出现在this question，但那就是你想要文本和图像居中。我们不希望图像和文本单独居中，我们希望图像和文本作为单个实体集中在一起。这实际上是UIButton已经做过的，所以我们只需要调整间距。

CGFloat spacing = 10; // the amount of spacing to appear between image and title
tabBtn.imageEdgeInsets = UIEdgeInsetsMake(0, 0, 0, spacing);
tabBtn.titleEdgeInsets = UIEdgeInsetsMake(0, spacing, 0, 0);

我还把它变成了UIButton的一个类别，所以它很容易使用：

<强>的UIButton + Position.h

@interface UIButton(ImageTitleCentering)

-(void) centerButtonAndImageWithSpacing:(CGFloat)spacing;

@end

<强>的UIButton + Position.m

@implementation UIButton(ImageTitleCentering)

-(void) centerButtonAndImageWithSpacing:(CGFloat)spacing {
    self.imageEdgeInsets = UIEdgeInsetsMake(0, 0, 0, spacing);
    self.titleEdgeInsets = UIEdgeInsetsMake(0, spacing, 0, 0);
}

@end

所以现在我所要做的就是：

[button centerButtonAndImageWithSpacing:10];

我每次都得到我需要的东西。不再手动弄乱边缘插入物。

编辑：交换图片和文字

回应@Javal的评论

使用相同的机制，我们可以交换图像和文本。要完成交换，只需使用负间距，还要包括文本和图像的宽度。这将需要知道帧并且已经执行了布局。

[self.view layoutIfNeeded];
CGFloat flippedSpacing = -(desiredSpacing + button.currentImage.size.width + button.titleLabel.frame.size.width);
[button centerButtonAndImageWithSpacing:flippedSpacing];

当然你可能想要为此做一个很好的方法，可能会添加第二种方法，这是留给读者的练习。

Answer 2

我参加这个派对有点晚了，但我觉得我有一些有用的东西要加上。

Kekoa的答案很棒但是，正如RonLugge所提到的，它可以使按钮不再尊重sizeToFit，或者更重要的是，可以使按钮在内在大小时剪切其内容。糟糕！

首先，

关于我如何相信imageEdgeInsets和titleEdgeInsets工作的简要说明：

docs for imageEdgeInsets部分内容如下：

使用此属性可以调整按钮图像的有效绘图矩形并重新定位。您可以为四个插图（顶部，左侧，底部，右侧）中的每一个指定不同的值。正值会缩小或缩小，使其靠近按钮的中心。负值会扩大或消除该边缘。

我相信这个文档是在想象按钮没有标题，只是一个图像。通过这种方式思考更有意义，并且表现出UIEdgeInsets通常的行为方式。基本上，图像的框架（或带有titleEdgeInsets的标题）向内移动以获得正插入，向外移动用于负插入。

好的，那又怎样？

我到了那里！这是默认设置，设置图像和标题（按钮边框为绿色只是为了显示它的位置）：

Starting image; no space between title and image.

当你想要一个图像和一个标题之间的间距，而不会导致任何一个被压碎，你需要设置四个不同的插图，每个图像和标题两个。这是因为您不想更改这些元素的尺寸。帧，但只是他们的位置。当你开始这样思考时，对Kekoa优秀类别的必要改变就变得清晰了：

@implementation UIButton(ImageTitleCentering)

- (void)centerButtonAndImageWithSpacing:(CGFloat)spacing {
    CGFloat insetAmount = spacing / 2.0;
    self.imageEdgeInsets = UIEdgeInsetsMake(0, -insetAmount, 0, insetAmount);
    self.titleEdgeInsets = UIEdgeInsetsMake(0, insetAmount, 0, -insetAmount);
}

@end

但等等，你说，当我这样做时，我明白了：

Spacing is good, but the image and title are outside the view's frame.

噢，是的！我忘了，the docs警告过我。他们在一定程度上说：

此属性仅用于在布局期间定位图像。该按钮不会使用此属性来确定intrinsicContentSize和sizeThatFits:。

但是一个可以提供帮助的属性，而且contentEdgeInsets。 The docs就此而言，部分：

该按钮使用此属性来确定intrinsicContentSize和sizeThatFits:。

听起来不错。因此，让我们再次调整该类别：

@implementation UIButton(ImageTitleCentering)

- (void)centerButtonAndImageWithSpacing:(CGFloat)spacing {
    CGFloat insetAmount = spacing / 2.0;
    self.imageEdgeInsets = UIEdgeInsetsMake(0, -insetAmount, 0, insetAmount);
    self.titleEdgeInsets = UIEdgeInsetsMake(0, insetAmount, 0, -insetAmount);
    self.contentEdgeInsets = UIEdgeInsetsMake(0, insetAmount, 0, insetAmount);
}

@end

你得到了什么？

Spacing and frame are now correct.

看起来像是我的赢家。

在斯威夫特工作并且根本不想做任何想法？这是Swift中扩展的最终版本：

extension UIButton {
    func centerTextAndImage(spacing: CGFloat) {
        let insetAmount = spacing / 2
        imageEdgeInsets = UIEdgeInsets(top: 0, left: -insetAmount, bottom: 0, right: insetAmount)
        titleEdgeInsets = UIEdgeInsets(top: 0, left: insetAmount, bottom: 0, right: -insetAmount)
        contentEdgeInsets = UIEdgeInsets(top: 0, left: insetAmount, bottom: 0, right: insetAmount)
    }
}

Answer 3

在界面生成器中。选择UIButton - ＆gt;属性检查器 - ＆gt; Edge =标题并修改边缘插入

Answer 4

此外，如果你想做类似于

的事情

enter image description here

你需要

1.将按钮的水平和垂直对齐设置为

enter image description here

找到所有必需的值并设置UIImageEdgeInsets

        CGSize buttonSize = button.frame.size;
        NSString *buttonTitle = button.titleLabel.text;
        CGSize titleSize = [buttonTitle sizeWithAttributes:@{ NSFontAttributeName : [UIFont camFontZonaProBoldWithSize:12.f] }];
        UIImage *buttonImage = button.imageView.image;
        CGSize buttonImageSize = buttonImage.size;

        CGFloat offsetBetweenImageAndText = 10; //vertical space between image and text

        [button setImageEdgeInsets:UIEdgeInsetsMake((buttonSize.height - (titleSize.height + buttonImageSize.height)) / 2 - offsetBetweenImageAndText,
                                                    (buttonSize.width - buttonImageSize.width) / 2,
                                                    0,0)];                
        [button setTitleEdgeInsets:UIEdgeInsetsMake((buttonSize.height - (titleSize.height + buttonImageSize.height)) / 2 + buttonImageSize.height + offsetBetweenImageAndText,
                                                    titleSize.width + [button imageEdgeInsets].left > buttonSize.width ? -buttonImage.size.width  +  (buttonSize.width - titleSize.width) / 2 : (buttonSize.width - titleSize.width) / 2 - buttonImage.size.width,
                                                    0,0)];

这将在按钮上排列您的标题和图像。

另请注意在每次重播时更新此内容

夫特

import UIKit

extension UIButton {
    // MARK: - UIButton+Aligment

    func alignContentVerticallyByCenter(offset:CGFloat = 10) {
        let buttonSize = frame.size

        if let titleLabel = titleLabel,
            let imageView = imageView {

            if let buttonTitle = titleLabel.text,
                let image = imageView.image {
                let titleString:NSString = NSString(string: buttonTitle)
                let titleSize = titleString.sizeWithAttributes([
                    NSFontAttributeName : titleLabel.font
                    ])
                let buttonImageSize = image.size

                let topImageOffset = (buttonSize.height - (titleSize.height + buttonImageSize.height + offset)) / 2
                let leftImageOffset = (buttonSize.width - buttonImageSize.width) / 2
                imageEdgeInsets = UIEdgeInsetsMake(topImageOffset,
                                                   leftImageOffset,
                                                   0,0)

                let titleTopOffset = topImageOffset + offset + buttonImageSize.height
                let leftTitleOffset = (buttonSize.width - titleSize.width) / 2 - image.size.width

                titleEdgeInsets = UIEdgeInsetsMake(titleTopOffset,
                                                   leftTitleOffset,
                                                   0,0)
            }
        }
    }
}

Answer 5

使用此功能可以避免很多麻烦 -

myButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;   
myButton.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

这会自动将您的所有内容与左侧（或任何您想要的位置）对齐

斯威夫特3：

myButton.contentHorizontalAlignment = UIControlContentHorizontalAlignment.left;   
myButton.contentVerticalAlignment = UIControlContentVerticalAlignment.center;

Answer 6

在 Xcode 8.0 中，您只需在尺寸检查器中更改insets即可。

选择UIButton - ＆gt;属性检查器 - ＆gt;转到大小检查器并修改内容，图像和标题插入。

如果您想更改右侧的图像，只需在属性检查器中将语义属性更改为Force Right-to-left。

Answer 7

我对这个派对来说有点晚了，但我想我有一些有用的东西可以补充：o）。

我创建了一个UIButton子类，其目的是能够选择按钮的图像在垂直或水平布局的位置。

这意味着你可以制作这种按钮：

这里有关于如何使用我的类创建这些按钮的详细信息：

func makeButton (imageVerticalAlignment:LayoutableButton.VerticalAlignment, imageHorizontalAlignment:LayoutableButton.HorizontalAlignment, title:String) -> LayoutableButton {
    let button = LayoutableButton ()

    button.imageVerticalAlignment = imageVerticalAlignment
    button.imageHorizontalAlignment = imageHorizontalAlignment

    button.setTitle(title, for: .normal)

    // add image, border, ...

    return button
}

let button1 = makeButton(imageVerticalAlignment: .center, imageHorizontalAlignment: .left, title: "button1")
let button2 = makeButton(imageVerticalAlignment: .center, imageHorizontalAlignment: .right, title: "button2")
let button3 = makeButton(imageVerticalAlignment: .top, imageHorizontalAlignment: .center, title: "button3")
let button4 = makeButton(imageVerticalAlignment: .bottom, imageHorizontalAlignment: .center, title: "button4")
let button5 = makeButton(imageVerticalAlignment: .bottom, imageHorizontalAlignment: .center, title: "button5")
button5.contentEdgeInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)

为此，我添加了2个属性：imageVerticalAlignment和imageHorizontalAlignment。当然，如果你的按钮只有图像或标题......根本不要使用这个课程！

我还添加了一个名为imageToTitleSpacing的属性，允许您调整标题和图像之间的空间。

如果您想直接使用imageEdgeInsets，titleEdgeInsets和contentEdgeInsets或与新布局属性结合使用，本课程会尽力兼容。

正如@ravron解释我们的那样，我尽力使按钮内容边缘正确（正如您可以看到红色边框）。

您也可以在Interface Builder中使用它：

创建UIButton
更改按钮类
使用＆＃34; center＆＃34;，＆＃34; top＆＃34;，＆＃34; bottom＆＃34;，＆＃34; left＆＃34;调整可布局属性或＆＃34;对＆＃34;

此处代码（gist）：

@IBDesignable
class LayoutableButton: UIButton {

    enum VerticalAlignment : String {
        case center, top, bottom, unset
    }


    enum HorizontalAlignment : String {
        case center, left, right, unset
    }


    @IBInspectable
    var imageToTitleSpacing: CGFloat = 8.0 {
        didSet {
            setNeedsLayout()
        }
    }


    var imageVerticalAlignment: VerticalAlignment = .unset {
        didSet {
            setNeedsLayout()
        }
    }

    var imageHorizontalAlignment: HorizontalAlignment = .unset {
        didSet {
            setNeedsLayout()
        }
    }

    @available(*, unavailable, message: "This property is reserved for Interface Builder. Use 'imageVerticalAlignment' instead.")
    @IBInspectable
    var imageVerticalAlignmentName: String {
        get {
            return imageVerticalAlignment.rawValue
        }
        set {
            if let value = VerticalAlignment(rawValue: newValue) {
                imageVerticalAlignment = value
            } else {
                imageVerticalAlignment = .unset
            }
        }
    }

    @available(*, unavailable, message: "This property is reserved for Interface Builder. Use 'imageHorizontalAlignment' instead.")
    @IBInspectable
    var imageHorizontalAlignmentName: String {
        get {
            return imageHorizontalAlignment.rawValue
        }
        set {
            if let value = HorizontalAlignment(rawValue: newValue) {
                imageHorizontalAlignment = value
            } else {
                imageHorizontalAlignment = .unset
            }
        }
    }

    var extraContentEdgeInsets:UIEdgeInsets = UIEdgeInsets.zero

    override var contentEdgeInsets: UIEdgeInsets {
        get {
            return super.contentEdgeInsets
        }
        set {
            super.contentEdgeInsets = newValue
            self.extraContentEdgeInsets = newValue
        }
    }

    var extraImageEdgeInsets:UIEdgeInsets = UIEdgeInsets.zero

    override var imageEdgeInsets: UIEdgeInsets {
        get {
            return super.imageEdgeInsets
        }
        set {
            super.imageEdgeInsets = newValue
            self.extraImageEdgeInsets = newValue
        }
    }

    var extraTitleEdgeInsets:UIEdgeInsets = UIEdgeInsets.zero

    override var titleEdgeInsets: UIEdgeInsets {
        get {
            return super.titleEdgeInsets
        }
        set {
            super.titleEdgeInsets = newValue
            self.extraTitleEdgeInsets = newValue
        }
    }

    //Needed to avoid IB crash during autolayout
    override init(frame: CGRect) {
        super.init(frame: frame)
    }


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

        self.imageEdgeInsets = super.imageEdgeInsets
        self.titleEdgeInsets = super.titleEdgeInsets
        self.contentEdgeInsets = super.contentEdgeInsets
    }

    override func layoutSubviews() {
        if let imageSize = self.imageView?.image?.size,
            let font = self.titleLabel?.font,
            let textSize = self.titleLabel?.attributedText?.size() ?? self.titleLabel?.text?.size(attributes: [NSFontAttributeName: font]) {

            var _imageEdgeInsets = UIEdgeInsets.zero
            var _titleEdgeInsets = UIEdgeInsets.zero
            var _contentEdgeInsets = UIEdgeInsets.zero

            let halfImageToTitleSpacing = imageToTitleSpacing / 2.0

            switch imageVerticalAlignment {
            case .bottom:
                _imageEdgeInsets.top = (textSize.height + imageToTitleSpacing) / 2.0
                _imageEdgeInsets.bottom = (-textSize.height - imageToTitleSpacing) / 2.0
                _titleEdgeInsets.top = (-imageSize.height - imageToTitleSpacing) / 2.0
                _titleEdgeInsets.bottom = (imageSize.height + imageToTitleSpacing) / 2.0
                _contentEdgeInsets.top = (min (imageSize.height, textSize.height) + imageToTitleSpacing) / 2.0
                _contentEdgeInsets.bottom = (min (imageSize.height, textSize.height) + imageToTitleSpacing) / 2.0
                //only works with contentVerticalAlignment = .center
                contentVerticalAlignment = .center
            case .top:
                _imageEdgeInsets.top = (-textSize.height - imageToTitleSpacing) / 2.0
                _imageEdgeInsets.bottom = (textSize.height + imageToTitleSpacing) / 2.0
                _titleEdgeInsets.top = (imageSize.height + imageToTitleSpacing) / 2.0
                _titleEdgeInsets.bottom = (-imageSize.height - imageToTitleSpacing) / 2.0
                _contentEdgeInsets.top = (min (imageSize.height, textSize.height) + imageToTitleSpacing) / 2.0
                _contentEdgeInsets.bottom = (min (imageSize.height, textSize.height) + imageToTitleSpacing) / 2.0
                //only works with contentVerticalAlignment = .center
                contentVerticalAlignment = .center
            case .center:
                //only works with contentVerticalAlignment = .center
                contentVerticalAlignment = .center
                break
            case .unset:
                break
            }

            switch imageHorizontalAlignment {
            case .left:
                _imageEdgeInsets.left = -halfImageToTitleSpacing
                _imageEdgeInsets.right = halfImageToTitleSpacing
                _titleEdgeInsets.left = halfImageToTitleSpacing
                _titleEdgeInsets.right = -halfImageToTitleSpacing
                _contentEdgeInsets.left = halfImageToTitleSpacing
                _contentEdgeInsets.right = halfImageToTitleSpacing
            case .right:
                _imageEdgeInsets.left = textSize.width + halfImageToTitleSpacing
                _imageEdgeInsets.right = -textSize.width - halfImageToTitleSpacing
                _titleEdgeInsets.left = -imageSize.width - halfImageToTitleSpacing
                _titleEdgeInsets.right = imageSize.width + halfImageToTitleSpacing
                _contentEdgeInsets.left = halfImageToTitleSpacing
                _contentEdgeInsets.right = halfImageToTitleSpacing
            case .center:
                _imageEdgeInsets.left = textSize.width / 2.0
                _imageEdgeInsets.right = -textSize.width / 2.0
                _titleEdgeInsets.left = -imageSize.width / 2.0
                _titleEdgeInsets.right = imageSize.width / 2.0
                _contentEdgeInsets.left = -((imageSize.width + textSize.width) - max (imageSize.width, textSize.width)) / 2.0
                _contentEdgeInsets.right = -((imageSize.width + textSize.width) - max (imageSize.width, textSize.width)) / 2.0
            case .unset:
                break
            }

            _contentEdgeInsets.top += extraContentEdgeInsets.top
            _contentEdgeInsets.bottom += extraContentEdgeInsets.bottom
            _contentEdgeInsets.left += extraContentEdgeInsets.left
            _contentEdgeInsets.right += extraContentEdgeInsets.right

            _imageEdgeInsets.top += extraImageEdgeInsets.top
            _imageEdgeInsets.bottom += extraImageEdgeInsets.bottom
            _imageEdgeInsets.left += extraImageEdgeInsets.left
            _imageEdgeInsets.right += extraImageEdgeInsets.right

            _titleEdgeInsets.top += extraTitleEdgeInsets.top
            _titleEdgeInsets.bottom += extraTitleEdgeInsets.bottom
            _titleEdgeInsets.left += extraTitleEdgeInsets.left
            _titleEdgeInsets.right += extraTitleEdgeInsets.right

            super.imageEdgeInsets = _imageEdgeInsets
            super.titleEdgeInsets = _titleEdgeInsets
            super.contentEdgeInsets = _contentEdgeInsets

        } else {
            super.imageEdgeInsets = extraImageEdgeInsets
            super.titleEdgeInsets = extraTitleEdgeInsets
            super.contentEdgeInsets = extraContentEdgeInsets
        }

        super.layoutSubviews()
    }
}

Answer 8

Riley Avron对帐户区域设置更改的一个小补充：

extension UIButton {
    func centerTextAndImage(spacing: CGFloat) {
        let insetAmount = spacing / 2
        let writingDirection = UIApplication.sharedApplication().userInterfaceLayoutDirection
        let factor: CGFloat = writingDirection == .LeftToRight ? 1 : -1

        self.imageEdgeInsets = UIEdgeInsets(top: 0, left: -insetAmount*factor, bottom: 0, right: insetAmount*factor)
        self.titleEdgeInsets = UIEdgeInsets(top: 0, left: insetAmount*factor, bottom: 0, right: -insetAmount*factor)
        self.contentEdgeInsets = UIEdgeInsets(top: 0, left: insetAmount, bottom: 0, right: insetAmount)
    }
}

Answer 9

Swift 4.x

extension UIButton {
    func centerTextAndImage(spacing: CGFloat) {
        let insetAmount = spacing / 2
        let writingDirection = UIApplication.shared.userInterfaceLayoutDirection
        let factor: CGFloat = writingDirection == .leftToRight ? 1 : -1

        self.imageEdgeInsets = UIEdgeInsets(top: 0, left: -insetAmount*factor, bottom: 0, right: insetAmount*factor)
        self.titleEdgeInsets = UIEdgeInsets(top: 0, left: insetAmount*factor, bottom: 0, right: -insetAmount*factor)
        self.contentEdgeInsets = UIEdgeInsets(top: 0, left: insetAmount, bottom: 0, right: insetAmount)
    }
}

<强>用法：

button.centerTextAndImage(spacing: 10.0)

Answer 10

以下是如何使用imageEdgeInsets的简单示例这将产生一个30x30的按钮，其可击中区域一直大于10像素（50x50）

    var expandHittableAreaAmt : CGFloat = 10
    var buttonWidth : CGFloat = 30
    var button = UIButton.buttonWithType(UIButtonType.Custom) as UIButton
    button.frame = CGRectMake(0, 0, buttonWidth+expandHittableAreaAmt, buttonWidth+expandHittableAreaAmt)
    button.imageEdgeInsets = UIEdgeInsetsMake(expandHittableAreaAmt, expandHittableAreaAmt, expandHittableAreaAmt, expandHittableAreaAmt)
    button.setImage(UIImage(named: "buttonImage"), forState: .Normal)
    button.addTarget(self, action: "didTouchButton:", forControlEvents:.TouchUpInside)

Answer 11

我写下面的代码。在产品版本中效果很好。 Supprot Swift 4.2 +

extension UIButton{
 enum ImageTitleRelativeLocation {
    case imageUpTitleDown
    case imageDownTitleUp
    case imageLeftTitleRight
    case imageRightTitleLeft
}
 func centerContentRelativeLocation(_ relativeLocation: 
                                      ImageTitleRelativeLocation,
                                   spacing: CGFloat = 0) {
    assert(contentVerticalAlignment == .center,
           "only works with contentVerticalAlignment = .center !!!")

    guard (title(for: .normal) != nil) || (attributedTitle(for: .normal) != nil) else {
        assert(false, "TITLE IS NIL! SET TITTLE FIRST!")
        return
    }

    guard let imageSize = self.currentImage?.size else {
        assert(false, "IMGAGE IS NIL! SET IMAGE FIRST!!!")
        return
    }
    guard let titleSize = titleLabel?
        .systemLayoutSizeFitting(UIView.layoutFittingCompressedSize) else {
            assert(false, "TITLELABEL IS NIL!")
            return
    }

    let horizontalResistent: CGFloat
    // extend contenArea in case of title is shrink
    if frame.width < titleSize.width + imageSize.width {
        horizontalResistent = titleSize.width + imageSize.width - frame.width
        print("horizontalResistent", horizontalResistent)
    } else {
        horizontalResistent = 0
    }

    var adjustImageEdgeInsets: UIEdgeInsets = .zero
    var adjustTitleEdgeInsets: UIEdgeInsets = .zero
    var adjustContentEdgeInsets: UIEdgeInsets = .zero

    let verticalImageAbsOffset = abs((titleSize.height + spacing) / 2)
    let verticalTitleAbsOffset = abs((imageSize.height + spacing) / 2)

    switch relativeLocation {
    case .imageUpTitleDown:

        adjustImageEdgeInsets.top = -verticalImageAbsOffset
        adjustImageEdgeInsets.bottom = verticalImageAbsOffset
        adjustImageEdgeInsets.left = titleSize.width / 2 + horizontalResistent / 2
        adjustImageEdgeInsets.right = -titleSize.width / 2 - horizontalResistent / 2

        adjustTitleEdgeInsets.top = verticalTitleAbsOffset
        adjustTitleEdgeInsets.bottom = -verticalTitleAbsOffset
        adjustTitleEdgeInsets.left = -imageSize.width / 2 + horizontalResistent / 2
        adjustTitleEdgeInsets.right = imageSize.width / 2 - horizontalResistent / 2

        adjustContentEdgeInsets.top = spacing
        adjustContentEdgeInsets.bottom = spacing
        adjustContentEdgeInsets.left = -horizontalResistent
        adjustContentEdgeInsets.right = -horizontalResistent
    case .imageDownTitleUp:
        adjustImageEdgeInsets.top = verticalImageAbsOffset
        adjustImageEdgeInsets.bottom = -verticalImageAbsOffset
        adjustImageEdgeInsets.left = titleSize.width / 2 + horizontalResistent / 2
        adjustImageEdgeInsets.right = -titleSize.width / 2 - horizontalResistent / 2

        adjustTitleEdgeInsets.top = -verticalTitleAbsOffset
        adjustTitleEdgeInsets.bottom = verticalTitleAbsOffset
        adjustTitleEdgeInsets.left = -imageSize.width / 2 + horizontalResistent / 2
        adjustTitleEdgeInsets.right = imageSize.width / 2 - horizontalResistent / 2

        adjustContentEdgeInsets.top = spacing
        adjustContentEdgeInsets.bottom = spacing
        adjustContentEdgeInsets.left = -horizontalResistent
        adjustContentEdgeInsets.right = -horizontalResistent
    case .imageLeftTitleRight:
        adjustImageEdgeInsets.left = -spacing / 2
        adjustImageEdgeInsets.right = spacing / 2

        adjustTitleEdgeInsets.left = spacing / 2
        adjustTitleEdgeInsets.right = -spacing / 2

        adjustContentEdgeInsets.left = spacing
        adjustContentEdgeInsets.right = spacing
    case .imageRightTitleLeft:
        adjustImageEdgeInsets.left = titleSize.width + spacing / 2
        adjustImageEdgeInsets.right = -titleSize.width - spacing / 2

        adjustTitleEdgeInsets.left = -imageSize.width - spacing / 2
        adjustTitleEdgeInsets.right = imageSize.width + spacing / 2

        adjustContentEdgeInsets.left = spacing
        adjustContentEdgeInsets.right = spacing
    }

    imageEdgeInsets = adjustImageEdgeInsets
    titleEdgeInsets = adjustTitleEdgeInsets
    contentEdgeInsets = adjustContentEdgeInsets

    setNeedsLayout()
}
}

Answer 12

Swift 3中的优雅方式，更好地理解：

serial = function(x,y,z){
  table_serial <- data.frame()
  for (i in 1:4 ) {
       s1 <- serial.test(VAR(cbind(x,y), p=i, type="const"), lags.pt=4, type=z)$serial$statistic[[1]]
       s2 <- serial.test(VAR(cbind(x,y), p=i, type="const"), lags.pt=4, type=z)$serial$p.value[[1]]
       table_serial <- rbind(table_serial, c(i, s1, s2))
   }
   colnames(table_serial) <- c("Lag", "Chi", "p")
   table_serial
}

# test it
set.seed(1234)  # make it reproducible
serial(rnorm(100), rnorm(100), "BG")
  Lag      Chi         p
1   1 13.76826 0.8420485
2   2 27.77865 0.1147436
3   3 17.09634 0.6467093
4   4 13.58514 0.8508920

Answer 13

在 swift 5.3 和 @ravron 的启发下回答：

extension UIButton {
    /// Fits the image and text content with a given spacing
    /// - Parameters:
    ///   - spacing: Spacing between the Image and the text
    ///   - contentXInset: The spacing between the view to the left image and the right text to the view
    func setHorizontalMargins(imageTextSpacing: CGFloat, contentXInset: CGFloat = 0) {
        let imageTextSpacing = imageTextSpacing / 2
        
        contentEdgeInsets = UIEdgeInsets(top: 0, left: (imageTextSpacing + contentXInset), bottom: 0, right: (imageTextSpacing + contentXInset))
        imageEdgeInsets = UIEdgeInsets(top: 0, left: -imageTextSpacing, bottom: 0, right: imageTextSpacing)
        titleEdgeInsets = UIEdgeInsets(top: 0, left: imageTextSpacing, bottom: 0, right: -imageTextSpacing)
    }
}

它从视图到图像以及从标签到视图添加了额外的水平边距

Answer 14

我的垂直居中方法：

extension UIButton {
    
    /// Layout image and title with vertical centering.
    /// - Parameters:
    ///   - size: The button size.
    ///   - imageTopOffset: Top offset for image.
    ///   - spacing: Distance between image and title.
    func verticalAlignmentByCenter(size: CGSize, imageTopOffset: CGFloat, spacing: CGFloat) {
        let contentRect = contentRect(forBounds: CGRect(origin: .zero, size: size))
        let imageRect = imageRect(forContentRect: contentRect)
        let titleRect = titleRect(forContentRect: contentRect)

        let imageTop = imageTopOffset - imageRect.origin.y
        let imageLeft = contentRect.width/2 - imageRect.width/2
        imageEdgeInsets = UIEdgeInsets(top: imageTop, left: imageLeft, bottom: 0, right: 0)

        let titleTop = imageTopOffset + spacing + imageRect.height - titleRect.origin.y
        let titleLeft = titleRect.origin.x - contentRect.width/2 - titleRect.width/2
        titleEdgeInsets = UIEdgeInsets(top: titleTop, left: titleLeft, bottom: 0, right: 0)
    }
    
}

Answer 15

@ravron 在提供这个答案方面做得非常出色。

就我而言，我不仅需要在图像和标题之间添加水平宽度，还需要在按钮的“前导”和“尾随”中添加水平空间。

因此，我使用了内部图像和标签的内在内容大小：

<块引用>

接收视图的自然大小，仅考虑视图本身的属性。

|                                                                                   |
|[LEADING SPACE] [Image] [SPACE BETWEEN IMAGE AND TITLE] Add To     [TRAILING SPACE]|
|                                                        Favorites      |

let leadingTrailingSpace = 10
let horizontalWidthBetweenImageAndTitle = 4
let insetAmount = horizontalWidthBetweenImageAndTitle / CGFloat(2)
    button.imageEdgeInsets = UIEdgeInsets(top: 0, left: -CGFloat(insetAmount), bottom: 0, right: insetAmount);
    button.titleEdgeInsets = UIEdgeInsets(top: 0, left: CGFloat(insetAmount), bottom: 0, right: -insetAmount);
    button.contentEdgeInsets = UIEdgeInsets(top: 0, left: CGFloat(insetAmount), bottom: 0, right: insetAmount);
    
    let buttonWidth =
        (button.titleLabel?.intrinsicContentSize.width ?? 0) +
        (button.imageView?.intrinsicContentSize.width ?? 0)
        + insetAmount
        + leadingTrailingSpace
    button.widthAnchor.constraint(equalToConstant: buttonWidth).isActive = true

Answer 16

解决方案的快速4.2版本如下：

let spacing: CGFloat = 10 // the amount of spacing to appear between image and title
self.button?.imageEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: spacing)
self.button?.titleEdgeInsets = UIEdgeInsets(top: 0, left: spacing, bottom: 0, right: 0)

将UIButton上的文本和图像与imageEdgeInsets和titleEdgeInsets对齐

16 个答案: