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By: a guest on Jul 4th, 2012  |  syntax: None  |  size: 0.28 KB  |  hits: 12  |  expires: Never
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  1. How to check that a class has a method before calling it
  2. if([targetObject respondsToSelector:@selector(myOptionalMethod)]) {
  3.     [targetObject myOptionalMethod];
  4. }
  5.        
  6. if ([[UIApplication sharedApplication] respondsToSelector:@selector(beginBackgroundTaskWithExpirationHandler:)]) {
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