Checking to see if an optional protocol method has been implemented

iphone objective-c delegates protocols

respondsToSelector: is part of the NSObject protocol. Including NSObject in MyProtocol should solve your problem:

@protocol MyProtocol <NSObject>@optional-(void)optionalProtocolMethod:(id)anObject;@end

iphone objective-c delegates protocols

What I do is applying the following recipe:

if(self.delegate && [self.delegate respondsToSelector:@selector(closed)]){    [self.delegate closed];}

Where 'closed' is the method that I wanted to call.

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