Swift UIAlertController Getting Text Field Text

问题

I need to get the text from the text fields in my alert view when the Input button is pressed.

func inputMsg() {

    var points = ""
    var outOf = ""

    var alertController = UIAlertController(title: "Input View", message: "Please Input Your Grade", preferredStyle: UIAlertControllerStyle.Alert)

    let actionCancle = UIAlertAction(title: "Cancle", style: UIAlertActionStyle.Cancel) { ACTION in

        println("Cacle")
    }
    let actionInput = UIAlertAction(title: "Input", style: UIAlertActionStyle.Default) { ACTION in

        println("Input")
        println(points)
        println(outOf)
    }

    alertController.addAction(actionCancle)
    alertController.addAction(actionInput)
    alertController.addTextFieldWithConfigurationHandler({(txtField: UITextField!) in
        txtField.placeholder = "I got"
        txtField.keyboardType = UIKeyboardType.NumberPad
        points = txtField.text
        })



    alertController.addTextFieldWithConfigurationHandler({(txtField: UITextField!) in
        txtField.placeholder = "Out Of"
        txtField.keyboardType = UIKeyboardType.NumberPad
        outOf = txtField.text
    })
    presentViewController(alertController, animated: true, completion: nil)
}

回答1:

The UIAlertController has a textFields property. That's its text fields. Any of your handlers can examine it and thus can get the text from any of the text fields.

回答2:

As requested here is an implementation solution.

alertController.addAction(UIAlertAction(title: "Submit", style: UIAlertActionStyle.Default,handler: {
            (alert: UIAlertAction!) in
            if let textField = alertController.textFields?.first as? UITextField{
                println(textField.text)
            }
        }))

As stated above, the alertController has a property called textFields. You can conditionally unwrap that property to safely access a text field if you have added one. In this case since there is only one text field I just did the unwrap using the first property. Hope it helps.

来源：https://stackoverflow.com/questions/26305975/swift-uialertcontroller-getting-text-field-text

标签

xcode

swift

uialertcontroller