Swift - 实现UILable的文字描边（艺术字）

本篇文章主要实现艺术字、给UILable添加内边距~

效果图如下：

代码如下：

var textInsets: UIEdgeInsets = UIEdgeInsets(top: 0, left: 16, bottom: 0, right: 16)
override func drawText(in rect: CGRect) {
    //先描边填充
    let context = UIGraphicsGetCurrentContext()
            
    context?.setLineWidth(宽度)
    context?.setLineJoin(.round)
    context?.setTextDrawingMode(.fillStroke)
    self.textColor = 颜色
    super.drawText(in: rect.inset(by: textInsets))

    //再描边
    context?.setLineWidth(宽度)
    context?.setLineJoin(.round)
    context?.setTextDrawingMode(.stroke)
    self.textColor = 颜色
    super.drawText(in: rect.inset(by: textInsets))
            
    //填充字体颜色
    context?.setTextDrawingMode(.fill)
    context?.setLineJoin(.round)
    self.textColor = 颜色
    super.drawText(in: rect.inset(by: textInsets))
}

//这里主要是用来增加UILabel的内边距
override func textRect(forBounds bounds: CGRect, limitedToNumberOfLines numberOfLines: Int) -> CGRect {
    let insets = textInsets
    var rect = super.textRect(forBounds: bounds.inset(by: insets),limitedToNumberOfLines: numberOfLines)
        
    rect.origin.x -= insets.left
    rect.origin.y -= insets.top
    rect.size.width += (insets.left + insets.right)
    rect.size.height += (insets.top + insets.bottom)
    return rect
}