Uppercase characters in UItextfield

Question

I have a question about iOS UIKeyboard.

I have a UITextField and I would to have the keyboard with only uppercase characters.<

Answer 1

This is a different approach I used, where it does the following:

1. Enforces capitalization as soon as the character is entered
2. Catches situations where the user disables caps lock even if it textfield is set to auto caps
3. Allows for easy editing
4. Works with Swift 2.2

First, register a notification to be updated whenever any changes occur in the textfield.

    textField.addTarget(self, action: #selector(YourClassName.textFieldDidChange(_:)), forControlEvents: UIControlEvents.EditingChanged)

Then, implement textFieldDidChange.

func textFieldDidChange(textField: UITextField) {
    textField.text = textField.text?.uppercaseString
}

I chose this to avoid a situation where the user sees an uneven experience of some capitalized, but then changed once they move to the next character.