objc_cover

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Say you have this Objective-C code:

- (void)notUsed {
	return;
}

- (void)actuallyUsed {
	return;
}

// ...

[self actuallyUsed];

Thanks to /usr/bin/otool, you can get clues about potentially unused methods, like this:

$ python objc_cover.py /Users/nst/Desktop/iCalReport 
# the following methods may be unreferenced
-[MyClass notUsed]

The idea was put first by "Luke the Hiesterman" on the Apple Objective-C list.