In Objective-C, when are the class pairs - metaclass object and class object, created? Is it in the beginning of the app execution or at the point when you first instantiate the first object of a class?
In Objective-C, when are metaclass object and class object created?
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At the point that the class is added to the class hierarchy. This is generally when the app is launched, but could be later if the class is added by a dynamically loaded library or is created programatically.
The class object and metaclass have to exist at the time that
+loadis called (which is the above).