我有一个UILabel,我想在顶部和底部添加空格。在限制最小高度的情况下,我将其修改为:

为了做到这一点,我使用了:

override func drawTextInRect(rect: CGRect) {
    var insets: UIEdgeInsets = UIEdgeInsets(top: 0.0, left: 10.0, bottom: 0.0, right: 10.0)
    super.drawTextInRect(UIEdgeInsetsInsetRect(rect, insets))
}

但我必须找到不同的方法,因为如果我写了超过两行,问题是一样的:


当前回答

如果你只寻找左右填充,你可以简单地在文本前后添加空白:

titleLabel.text = " \(categoryName) "

其他回答

只需使用一个UIView作为一个superview,并定义一个固定的边距标签与自动布局。

类似于其他答案,但使用func类来动态地设置填充:

class UILabelExtendedView: UILabel
{
    var topInset: CGFloat = 4.0
    var bottomInset: CGFloat = 4.0
    var leftInset: CGFloat = 8.0
    var rightInset: CGFloat = 8.0

    override func drawText(in rect: CGRect)
    {
        let insets: UIEdgeInsets = UIEdgeInsets(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
        super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
    }

    override public var intrinsicContentSize: CGSize
    {
        var contentSize = super.intrinsicContentSize
        contentSize.height += topInset + bottomInset
        contentSize.width += leftInset + rightInset
        return contentSize
    }

    func setPadding(top: CGFloat, left: CGFloat, bottom: CGFloat, right: CGFloat){
        self.topInset = top
        self.bottomInset = bottom
        self.leftInset = left
        self.rightInset = right
        let insets: UIEdgeInsets = UIEdgeInsets(top: top, left: left, bottom: bottom, right: right)
        super.drawText(in: UIEdgeInsetsInsetRect(self.frame, insets))
    }
}

在Swift 3中

最好最简单的方法

class UILabelPadded: UILabel {
     override func drawText(in rect: CGRect) {
     let insets = UIEdgeInsets.init(top: 0, left: 5, bottom: 0, right: 5)
     super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
    }

}

一个实用的解决方案是添加与主标签高度和颜色相同的空白标签。将主标签的前导/尾距设置为零,对齐垂直中心,并设置所需的宽度。

我已经尝试了Swift 4.2,希望它对你有用!

@IBDesignable class PaddingLabel: UILabel {

    @IBInspectable var topInset: CGFloat = 5.0
    @IBInspectable var bottomInset: CGFloat = 5.0
    @IBInspectable var leftInset: CGFloat = 7.0
    @IBInspectable var rightInset: CGFloat = 7.0

    override func drawText(in rect: CGRect) {
        let insets = UIEdgeInsets(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
        super.drawText(in: rect.inset(by: insets))
    }

    override var intrinsicContentSize: CGSize {
        let size = super.intrinsicContentSize
        return CGSize(width: size.width + leftInset + rightInset,
                      height: size.height + topInset + bottomInset)
    }   

    override var bounds: CGRect {
        didSet {
            // ensures this works within stack views if multi-line
            preferredMaxLayoutWidth = bounds.width - (leftInset + rightInset)
        }
    } 
}

或者你可以在这里使用CocoaPods https://github.com/levantAJ/PaddingLabel

吊舱' paddle标签','1.2'