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Am reading the book “Objective-C Programming” by Big Nerd Ranch, and am not sure about the differentiation.
Context: NSLog() is an Objective-C function (not a method!) that works a lot like printf(). In NSLog(), however, the format string is actually an instance of NSString.
A method is just a function that is defined as part of a class. A plain function, such as
NSLogorprintf, does not belong to a class.