在 UILabel 上设置 insets

Question

我正在尝试在 UILabel 中设置一些插图。它工作得很好，但现在 UIEdgeInsetsInsetRect 已被 CGRect.inset(by:) 取代，我不知道如何解决这个问题。

当我尝试将 CGRect.inset(by:) 与我的插图一起使用时，我收到消息称 UIEdgeInsets 无法转换为 CGRect。

我的代码

class TagLabel: UILabel {
    
    override func draw(_ rect: CGRect) {
        let inset = UIEdgeInsets(top: -2, left: 2, bottom: -2, right: 2)
        
        super.drawText(in: CGRect.insetBy(inset))
//        super.drawText(in: UIEdgeInsetsInsetRect(rect, inset)) // Old code
    }

}

有人知道如何设置 UILabel 的插图吗？

Answer 1

请更新您的代码如下

 class TagLabel: UILabel {

    override func draw(_ rect: CGRect) {
        let inset = UIEdgeInsets(top: -2, left: 2, bottom: -2, right: 2)
        super.drawText(in: rect.insetBy(inset))
    }
}

Answer 2

恕我直言，您还必须更新 intrinsicContentSize:

class InsetLabel: UILabel {

    let inset = UIEdgeInsets(top: -2, left: 2, bottom: -2, right: 2)

    override func drawText(in rect: CGRect) {
        super.drawText(in: rect.inset(by: inset))
    }

    override var intrinsicContentSize: CGSize {
        var intrinsicContentSize = super.intrinsicContentSize
        intrinsicContentSize.width += inset.left + inset.right
        intrinsicContentSize.height += inset.top + inset.bottom
        return intrinsicContentSize
    }

}

Answer 3

this code differs from the accepted answer because the accepted answer uses insetBy(inset) and this answer uses inset(by: inset). When I added this answer in iOS 10.1 and Swift 4.2.1 autocomplete DID NOT give you rect.inset(by: ) and I had to manually type it in. Maybe it does in Swift 5, I'm not sure

对于 iOS 10.1 和 Swift 4.2.1 使用 rect.inset(by:)

这个：

override func draw(_ rect: CGRect) {

    let inset = UIEdgeInsets(top: -2, left: 2, bottom: -2, right: 2)

    super.drawText(in: rect.inset(by: inset))
}

Answer 4

Swift 5 将方法 drawText(...) 替换为 draw(...)

extension UILabel {

open override func draw(_ rect: CGRect) {
    let inset = UIEdgeInsets(top: -2, left: 2, bottom: -2, right: 2)
    super.draw(rect.inset(by: inset))
    
}}

在 UILabel 上设置 insets

Set insets on UILabel

ios

uiedgeinsets

swift

我的代码