When a new object is created and initialized why do we use id? Can’t we use (NSObject*)?
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When a new object is created and initialized why do we use id? Can’t we use (NSObject*)?
Not every object in Objective C is
NSObject. There are other root classes (for example,NSProxy), that are not derived fromNSObject.idmeans absolutely any object. Everything is Objective C that can receive messages (includingClass) can be passed asidwithout type warnings.NSObject*is only useful on objects that are actually derived fromNSObject. If you pass something that is not derived from it, type checker will complain.