How do i correct this warning?

Question

I was searching for a Done button for the Number Pad,then i saw this question:

How to show "Done" button on iPhone number pad

I copied Archie's answer code into mine,and i get 2 warnings in this area:

- (void)textFieldDidBeginEditing:(NSNotification *)note {
    [self updateKeyboardButtonFor:[note object]];
}


- (void)keyboardWillShow:(NSNotification *)note {
    [self updateKeyboardButtonFor:[self findFirstResponderTextField]];
}

- (void)keyboardDidShow:(NSNotification *)note {
    [self updateKeyboardButtonFor:[self findFirstResponderTextField]];
}

The warnings are:

Incompatible Objective-C types initializing 'struct NSNotification *', expected 'struct UITextField *'

How can i correct that? I tried to switch with a UITextField but it all messed up

I didn't,i examined the code,but i didn't find errors. It may be that i'm new of this language.. — Phillip, Jun 14 '11 at 16:58

Deepak Danduprolu · Accepted Answer · 2011-06-14T17:00:50.390

As BoltClock suggested, it does seem a bit strange that Archie use a delegate method's name as a notification handler. The problem might be stemming from the fact that you must be adopting the UITextFieldDelegate protocol. If you've done so, remove the line observing the notification,

[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(textFieldDidBeginEditing:)
                                             name:UITextFieldTextDidBeginEditingNotification 
                                           object:nil];

and then edit make the textFieldDidBeginEditing: method while becoming the delegate of the text fields,

- (void)textFieldDidBeginEditing:(UITextField *)textField { 
    [self updateKeyboardButtonFor:textField]; 
}

Or alternatively, rename the occurrences of textFieldDidBeginEditing: with some other suitable method name

If you read the answer that the OP was referring to, it seems that post chose to use notifications instead of a text field delegate, for whatever strange reason. — BoltClock, Jun 14 '11 at 16:54

score 0 · Answer 2 · answered Jun 14 '11 at 16:53

0

textFieldDidBeginEditing is not a notification, it is a delegate method. The expected signature is - (void)textFieldDidBeginEditing:(UITextField *)aTextField

answered Jun 14 '11 at 16:53

Joshua Weinberg

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the name there doesn't matter, its called BY the textfield when editing starts, the textfield will be passed as that parameter. – Joshua Weinberg Jun 14 '11 at 16:54
Okay,i'll test and let you know. – Phillip Jun 14 '11 at 16:55

How do i correct this warning?

2 Answers2