set UITextField as non editable - Objective C

Question

    [Number.editable = NO];
    [Number resignFirstResponder];
    [Password.editable = NO];
    [Password resignFirstResponder];

I am getting the

Answer 1

Firstly, the [...] aren't needed if you're not sending a message.

Number.editable = NO;
[Number resignFirstResponder];
Password.editable = NO;
[Password resignFirstResponder];

But this is not the cause of error. The .editable property is only defined for UITextView, not UITextField. You should set the .enabled property for a UITextField (note that a UITextField is a UIControl).

Number.enabled = NO;
...