swift label不同颜色

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.rangeOfString(ranStr)

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

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

let label = UILabel()

label.frame = CGRectMake(10, 100, WIDTH-20, 30)

label.attributedText = attrstring

self.view.addSubview(label)