从UIAlertController访问输入 [英] Access input from UIAlertController

问题描述

我有一个UIAlertController，当他们在TouchID屏幕上选择输入密码时会提示用户。如何在屏幕上显示后恢复用户的输入？

I've got a UIAlertController which is prompted to the user when they choose "Enter Password" on the TouchID screen. How do I recover the user's input after presenting this on screen?

let passwordPrompt = UIAlertController(title: "Enter Password", message: "You have selected to enter your passwod.", preferredStyle: UIAlertControllerStyle.Alert)
passwordPrompt.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Default, handler: nil))
passwordPrompt.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))

passwordPrompt.addTextFieldWithConfigurationHandler({(textField: UITextField!) in
                        textField.placeholder = "Password"
                        textField.secureTextEntry = true
                        })

presentViewController(passwordPrompt, animated: true, completion: nil)

我知道OK按钮应该有一个处理程序，但是现在这段代码并没有真正做任何事情，但我想显示文本的输出FIEL d通过println。这真的只是一个测试应用程序，让我学习Swift和一些新的API。

I know the OK button should probably have a handler, but right now this code doesn't really do anything, but I want to display the output of the text field through a println. This is really just a test app for me to learn Swift and some new API stuff.

推荐答案

我知道评论已发布到回答这个问题，但答案应该明确解决方案。

I know comments have been posted to answer the question, but an answer should make the solution explicit.

@IBOutlet var newWordField: UITextField
func wordEntered(alert: UIAlertAction!){
    // store the new word
    self.textView2.text = deletedString + " " + self.newWordField.text
}
func addTextField(textField: UITextField!){
    // add the text field and make the result global
    textField.placeholder = "Definition"
    self.newWordField = textField
}

// display an alert
let newWordPrompt = UIAlertController(title: "Enter definition", message: "Trainging the machine!", preferredStyle: UIAlertControllerStyle.Alert)
newWordPrompt.addTextFieldWithConfigurationHandler(addTextField)
newWordPrompt.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Default, handler: nil))
newWordPrompt.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: wordEntered))
presentViewController(newWordPrompt, animated: true, completion: nil)

这会显示一个带有文本字段和两个操作按钮的提示。完成后它会读取文本字段。

This displays a prompt with a text field and two action buttons. It reads the text field when done.

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