swift label不同颜色、不同字体

let string = "点击注册按钮,即表示您已同意隐私条款和服务协议"

let ranStr = "同意"

let attrstring:NSMutableAttributedString = NSMutableAttributedString(string:string)

let str = NSString(string: string)

let theRange = str.range(of: ranStr)

attrstring.addAttribute(NSForegroundColorAttributeName, value: UIColor.red, range: theRange)

attrstring.addAttribute(NSFontAttributeName, value: UIFont.systemFont(ofSize: 14), range: theRange)

label.attributedText = attrstring