How to disable pasting in a TextField in Swift?

Question

I\'ve got a TextField with a numberPad and the function runs only if it contains numbers.

The user will crash the app if they paste letters

Answer 1

You can create an extension for UITextField and override canPerformAction:

override public func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
        return (action != "paste:") 
}