swift富文本 swift一个label不同颜色字体

• 此方法适用于textFiled的占位字符
• textView
• UILabel
• UIButton需要文字的地方都可以

func FuWenBen() -> NSMutableAttributedString {
        
        //定义富文本即有格式的字符串
        let attributedStrM : NSMutableAttributedString = NSMutableAttributedString()
        
        //        左上角星星
        let xingxing = NSAttributedString.init(string: "*", attributes: [NSAttributedString.Key.backgroundColor : UIColor.black , NSAttributedString.Key.foregroundColor : UIColor.red , NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 20) ,NSAttributedString.Key.baselineOffset : (20)])
        
        let wo = NSAttributedString.init(string: "我", attributes: [NSAttributedString.Key.backgroundColor : UIColor.gray , NSAttributedString.Key.foregroundColor : UIColor.green , NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 30)])
        
        let shi : NSAttributedString = NSAttributedString(string: "是", attributes: [NSAttributedString.Key.foregroundColor  : UIColor.purple, NSAttributedString.Key.font : UIFont.systemFont(ofSize: 12)])
        
        //帅逼
        let shuaibi : NSAttributedString = NSAttributedString(string: "帅逼", attributes: [NSAttributedString.Key.foregroundColor : UIColor.lightGray, NSAttributedString.Key.font : UIFont.systemFont(ofSize: 38)])
        
        //图片
        let smileImage  = UIImage.init(named: "tupian")
        let textAttachment : NSTextAttachment = NSTextAttachment()
        textAttachment.image = smileImage
        textAttachment.bounds = CGRect(x: 0, y: -4, width: 22, height: 22)
        
        attributedStrM.append(xingxing)
        attributedStrM.append(wo)
        attributedStrM.append(shi)
        attributedStrM.append(shuaibi)
        attributedStrM.append(NSAttributedString(attachment: textAttachment))
        
        return attributedStrM
    }

　　

　　效果如下：