ios - UILabel 边框和填充

Question

我想在我的标签内添加填充，以便在标签和边框之间留出空格。我为此创建了一个从 UILabel 扩展的类。

UILabelPadding.swift:

import UIKit

class UILabelPadding: UILabel {

    let padding = UIEdgeInsets(top: 30, left: 30, bottom: 30, right: 30)
    override func drawText(in rect: CGRect) {
        super.drawText(in: UIEdgeInsetsInsetRect(rect, padding))
    }

   override var intrinsicContentSize : CGSize {
        let superContentSize = super.intrinsicContentSize
        let width = superContentSize.width + padding.left + padding.right
        let heigth = superContentSize.height + padding.top + padding.bottom
        return CGSize(width: width, height: heigth)
    }

    override func sizeThatFits(_ size: CGSize) -> CGSize {
        let superSizeThatFits = super.sizeThatFits(size)
        let width = superSizeThatFits.width + padding.left + padding.right
        let heigth = superSizeThatFits.height + padding.top + padding.bottom
        return CGSize(width: width, height: heigth)
    }


}

我将 myLabel 的类型从 UILabel 更改为 UILabelPadding。在我的 UIViewController 中，我设置了 myLabel 的文本，调用了 sizeToFit()，然后我将边框和背景颜色添加到 myLabel:

   myLabel.text = "label test"
   myLabel.sizeToFit()
    //background + border
    myLabel.layer.borderColor  = UIColor(red: 27/255, green: 100/255, blue: 90/255,  alpha: 1.0).cgColor
    myLabel.layer.backgroundColor = UIColor(red: 27/255, green: 100/255, blue: 90/255,  alpha: 1.0).cgColor
    myLabel.layer.cornerRadius = 9
    myLabel.layer.masksToBounds = true
    myLabel.layer.borderWidth = 1

添加了边框和背景色，但填充不起作用。当我调试时，永远不会调用 sizeThatFits()。

有什么帮助吗？

Answer 1

我解决了这个问题!

对于那些面临同样问题的人:

1- 创建一个继承自 UILabel 的类:

UILabelPadding.swift:

class UILabelPadding: UILabel {

    let padding = UIEdgeInsets(top: 2, left: 8, bottom: 2, right: 8)
    override func drawText(in rect: CGRect) {
        super.drawText(in: rect.inset(by: padding))
    }

    override var intrinsicContentSize : CGSize {
        let superContentSize = super.intrinsicContentSize
        let width = superContentSize.width + padding.left + padding.right
        let heigth = superContentSize.height + padding.top + padding.bottom
        return CGSize(width: width, height: heigth)
    }



}

2- 将标签类型设置为 UILabelPadding 并确保该类型也在 Storyboard中设置。