如何在IOS中制作带有圆形边框的填充UILabel

Posted 2023-03-06

【中文标题】如何在IOS中制作带有圆形边框的填充UILabel

【英文标题】：How can I make a padded UILabel with rounded border in IOS

【发布时间】：2021-07-22 20:34:40

【问题描述】：

我在这里找到了构建填充标签的解决方案 https://***.com/a/58876988/826946 并在此处看到了一个使用 IBInspectable 使其易于从 InterfaceBuilder 中使用的答案：https://***.com/a/32368958/826946。我还希望同一个类能够在一个包中指定边框（宽度、颜色和角半径）。

【参考方案1】：

我正在这里建立一个填充标签的解决方案，在这里找到： https://***.com/a/58876988/826946 以及此处找到的 IBInspectable 的使用：https://***.com/a/32368958/826946，最后是此处的边框内容：https://***.com/a/50364841/826946 请注意，背景颜色仍然可以按照您已经可以在 Interface Builder 中为标签设置的常规方式设置

    import UIKit

    @IBDesignable class PaddedAndBorderedLabel: 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
        @IBInspectable var borderColor : UIColor = UIColor.black
        @IBInspectable var borderWidth : CGFloat = 1
        @IBInspectable var cornerRadius : CGFloat = 5
        
        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 func textRect(forBounds bounds:CGRect,
                           limitedToNumberOfLines n:Int) -> CGRect 
            let b = bounds
            let UIEI = UIEdgeInsets(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
            let tr = b.inset(by: UIEI)
            let ctr = super.textRect(forBounds: tr, limitedToNumberOfLines: 0)
            // that line of code MUST be LAST in this function, NOT first
            return ctr
                    

        override func draw(_ rect: CGRect) 
            layer.borderColor = borderColor.cgColor
            layer.borderWidth = borderWidth
            layer.cornerRadius = cornerRadius
            layer.masksToBounds = true
            super.draw(rect)