从 Swift 中的 iOS 警报中的 TextField 获取输入值 [英] Get input value from TextField in iOS alert in Swift
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问题描述
我正在尝试使用输入生成警报消息,然后从输入中获取值.我发现了很多很好的教程如何制作输入文本字段.但我无法从警报中获取值.
I'm trying to make an alert message with input, and then get the value from the input. I've found many good tutorials how to make the input text field. but I can't get the value from the alert.
推荐答案
针对 Swift 3 及更高版本更新:
Updated for Swift 3 and above:
//1. Create the alert controller.
let alert = UIAlertController(title: "Some Title", message: "Enter a text", preferredStyle: .alert)
//2. Add the text field. You can configure it however you need.
alert.addTextField { (textField) in
textField.text = "Some default text"
}
// 3. Grab the value from the text field, and print it when the user clicks OK.
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { [weak alert] (_) in
let textField = alert.textFields![0] // Force unwrapping because we know it exists.
print("Text field: (textField.text)")
}))
// 4. Present the alert.
self.present(alert, animated: true, completion: nil)
<小时>
斯威夫特 2.x
Swift 2.x
假设您想在 iOS 上收到操作提醒:
Assuming you want an action alert on iOS:
//1. Create the alert controller.
var alert = UIAlertController(title: "Some Title", message: "Enter a text", preferredStyle: .Alert)
//2. Add the text field. You can configure it however you need.
alert.addTextFieldWithConfigurationHandler({ (textField) -> Void in
textField.text = "Some default text."
})
//3. Grab the value from the text field, and print it when the user clicks OK.
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { [weak alert] (action) -> Void in
let textField = alert.textFields![0] as UITextField
println("Text field: (textField.text)")
}))
// 4. Present the alert.
self.presentViewController(alert, animated: true, completion: nil)
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