Swift UIlabel 的高级用法，文本显示表情，图片

可以定义一个UIlabel的扩展代码如下class CPSPFMarkLabel: UILabel { convenience init(text: String) { self.init(frame:CGRect.zero) let markLabelText = " 清明时节雨纷纷☺" + text self.textAlignment = .center self.textColor = UIConstants.AppFontColor self.font = UIConstants.DefaultFont15 self.backgroundColor = UIConstants.AppWhiteColor let markAttribute = NSMutableAttributedString(string: markLabelText) markAttribute.addAttribute(NSAttributedStringKey.foregroundColor, value:UIConstants.AppRedColor, range: NSRange(location: 6,length: text.count)) //以上是富文本显示 let arkattch = NSTextAttachment() //定义一个attachment markattch.image = UIImage(named: “image_timing”)//初始化图片 markattch.bounds = CGRect(x: 0, y: -1, width: 15, height: 15) //初始化图片的 bounds let markattchStr = NSAttributedString(attachment: markattch) // 将attachment 加入富文本中 markAttribute.insert(markattchStr, at: 0)// 将markattchStr 加入原有文字的某个位置 self.attributedText = markAttribute }}