效果图

Paste_Image.png

    static func textFieldPlaceholder(textField: UITextField, message: String) {
        textField.attributedPlaceholder = NSAttributedString(string:message,attributes:[NSForegroundColorAttributeName: UIColor.whiteColor()])
    }
// 引用
  Tools.textFieldPlaceholder(findPwdByPhoneTextField, message: "请输入手机号码")

    private lazy var couponTextFiled: UITextField = {
        let couponTextFiled = UITextField()
        couponTextFiled.keyboardType = .NumberPad
        couponTextFiled.borderStyle = .RoundedRect
        couponTextFiled.autocorrectionType = .No
        couponTextFiled.font = UIFont.systemFontOfSize(14)
        let placeholder = NSAttributedString(string: "请输入优惠劵号码", attributes: [NSFontAttributeName : UIFont.systemFontOfSize(14), NSForegroundColorAttributeName : UIColor(red: 50 / 255.0, green: 50 / 255.0, blue: 50 / 255.0, alpha: 0.8)])
        couponTextFiled.attributedPlaceholder = placeholder
        return couponTextFiled
    }()