Checking if an object has been released before sending a message to it
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by Tom Irving
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or by Tom Irving
Published on 2010-06-02T00:28:15Z
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2010/06/02
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I've only recently noticed a crash in one of my apps when an object tried to message its delegate and the delegate had already been released.
At the moment, just before calling any delegate methods, I run this check:
if (delegate && [delegate respondsToSelector:...]){
[delegate ...];
}
But obviously this doesn't account for if the delegate isn't nil, but has been deallocated.
Besides setting the object's delegate to nil in the delegate's dealloc method, is there a way to check if the delegate has already been released just incase I no longer have a reference to the object.
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