“uppercaseString” and “lowercaseString” on UITextField crash in Swift

Question

I have a small application which has 1 ViewController with: 2 Outlets (one UITextField and one UILabel) and 1 Action that is triggered whe

Answer 1

This is a known issue with beta 1 and it has being fixed. You are using a button to update the label field but there is no need to use a button for that. You can choose to connect your IBAction to your text Field's Sent Events Editing Changed to make it change with a real time as you type preview.

Swift Compiler • @objc enums no longer cause the compiler to crash when used from another file. (19775284) • Fixed a use after free crash in lowercaseString and uppercaseString. (19801253)

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var label: UILabel!

    @IBOutlet weak var textField: UITextField!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func changeText(sender: AnyObject) {
        label.text = textField.text.lowercaseString
    }

}

sample