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POsetting custom UIButton style according to its state
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copied!<p>I am creating a custom UIButton in my program (not in IB) and I would like it to show different images on different states, so I did :</p> <pre><code>UIImage *learnImg=[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"01" ofType:@"png"]]; self.learn=[[UIButton buttonWithType:UIButtonTypeCustom] retain]; [self.learn setFrame:CGRectMake(148, 108,254,97)]; [[self.learn imageView] setContentMode:UIViewContentModeScaleAspectFit]; [self.learn setImage:learnImg forState:UIControlStateNormal]; UIImage *learnSelected=[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"02" ofType:@"png"]]; [self.learn setImage:learnSelected forState:UIControlEventTouchDown]; [self.learn addTarget:self action:@selector(loadLearn:) forControlEvents:UIControlEventTouchUpInside]; </code></pre> <p>The problem is, the two images have different sizes so when I click on the button, the position of the button got 'translated' (I believe this is due to the 'setFrame' behaviour since the xy location should be relative).</p> <p>I couldn't think of a way to fix this, all I want is to make sure the button is right at the position during whatever states it's in. Is there anyway that I can set a complete set of style for each button state (frame, images etc)? Or any other thoughts?</p> <p>Thank you!</p> <p><em>I finally worked this around by re-setting the center of the button through two action events: UIControlEventTouchDown and UIControlEventTouchCancel. Thanks all for the comments.</em></p>

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