How to find out what UITextField caused a UIKeyboardWillShowNotification?

Question

I am trying to use a customized keyboard in my application, but I am hitting problems when trying to restrict it to one particular UITextField.

I based my code on this X

Answer 1

That project works great, but when I add an extra UITextField, the custom key gets put into the keyboard for that text field too.

You can set the keyboard type for a UITextField instance, e.g.:

[myTextField setKeyboardType:UIKeyboardTypeDefault];

or:

myTextField.keyboardType = UIKeyboardTypeDefault;

Search the Xcode help on UITextInputTraits Protocol for a list of UIKeyboardType constants.