ios - 带有自定义 UITextField 的 UIAlertController

Question

我正在尝试使用自定义 UITextField，更准确地说是 AKMaskField( here is AKMaskField project on GitHub )

但我运气不好，这是我的代码，一个简单的 UIAlertController:

 @IBAction func buttonClick(sender: AnyObject) {

    var alert = UIAlertController(title: "Vincular CPF", message: "Digite seu CPF para acumular mais pontos no seu programa de fidelidade (Somente números)", preferredStyle: UIAlertControllerStyle.Alert)

    alert.addTextFieldWithConfigurationHandler(textFieldConfig) //Line with error
    alert.addAction(UIAlertAction(title: "Cancelar", style: UIAlertActionStyle.Cancel, handler: handleCancelButton))
    alert.addAction(UIAlertAction(title: "Enviar", style: UIAlertActionStyle.Default, handler: {
            (UIAlertAction) in
            println("ok")
        }))



    self.presentViewController(alert, animated: true, completion: {


    })

}

func textFieldConfig(textField: AKMaskField){
    textField.mask = "{ddd}.{ddd}.{ddd}-{dd}"
    textField.maskTemplate = "x"
    textField.maskShowTemplate = true

    //textField.keyboardType = .NumberPad
    //textField.placeholder = "00000000000"
}

这是错误信息:

 Cannot invoke 'addTextFieldWithConfigurationHandler' with an argument list of type '((AKMaskField) -> ())'

错误很明显，我尝试了所有方法强制向下转换为 UITextField，但似乎没有任何效果。

有人知道我怎样才能做到这一点吗？

Answer 1

尝试创建另一个函数:

let config = {(textField: UITextField) in textFieldConfig((textField as? AKMaskField)!)}
alert.addTextFieldWithConfigurationHandler(config) //Line with error