iPhone - "Class" may not respond to "method"

Question

I am building a simple Navigation-based app using tables.

I have a custom "UITableViewCell" to customize the table cell data attached below.

@interface NewsCell : UITableViewCell 
{
    IBOutlet UILabel *newsTitle;
}
- (void)setNewsLabel:(NSString *)title;
@end

And then in my RootViewController, I set the text of the label "newsTitle" in "cellForRowAtIndexPath" method as follows.

static NSString *MyIdentifier = @"MyIdentifier";
MyIdentifier = @"NewsCell";

NewsCell *cell = (NewsCell *)[tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if(cell == nil) 
{
   [[NSBundle mainBundle] loadNibNamed:@"NewsCell" owner:self options:nil];
   cell = newsCell;
}

[cell setNewsLabel:@"hello testing"];
return cell;

When I run this, the app runs fine, but I get "NewsCell may not respond to '-setNewsLabel:'" warning.

Please help! Thank you.

Is the identifier string in xib as the same as "MyIdentifier"? — AechoLiu, Sep 01 '10 at 13:42

score 1 · Answer 1 · answered Sep 01 '10 at 14:48

In RootViewController.m, you need to `#import "NewsCell.h".

Or, stick #import "NewsCell.h" in your project's PCH (pre-compiled header) file.

The underlying issue is that the compiler only knows about methods that it has previously seen when parsing the header files (or ones in the PCH).

tobiasbayer · Answer 2 · 2010-09-01T13:40:44.187

0

Where does the variable newsCell come from? Is it really of type NewsCell?

edited Sep 01 '10 at 13:40

answered Sep 01 '10 at 13:24

tobiasbayer

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... cleaned, but still getting this warning. very strange. – ericbae Sep 01 '10 at 13:39
Hi tob, I declared "newsCell" in the RootViewController.h @interface RootViewController : UITableViewController { IBOutlet NewsCell *newsCell; } – ericbae Sep 01 '10 at 13:46
Did you make sure to connect the IBOutlet in IB? – MishieMoo Sep 01 '10 at 14:48

score 0 · Answer 3 · edited May 23 '17 at 12:26

0

You're creating the nib, but not assigning it to anything. See this question to create it right.

edited May 23 '17 at 12:26

Community

1
1

answered Sep 01 '10 at 13:34

MishieMoo

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I tried one of the suggested answers, but to no avail. This thing is driving me bananas! – ericbae Sep 01 '10 at 13:54
Question, were you following this tutorial: http://blancer.com/tutorials/i-phone/25543/iphone-programming-tutorial-part-6-creating-custom-uitableviewcell-using-interface-builder-uitableview/ ?? – MishieMoo Sep 01 '10 at 14:19

iPhone - "Class" may not respond to "method"

3 Answers3