Stanford University, CS193p, Lecture 3, Page 45
I read this too
The Objective-C Programming documentation, Selectors
Still can’t understand any of both
Can someone explain it more clearly? It would be better if it’s in a C/C++ way 🙂
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Stanford University, CS193p, Lecture 3, Page 45
I read this too
The Objective-C Programming documentation, Selectors
Still can’t understand any of both
Can someone explain it more clearly? It would be better if it’s in a C/C++ way 🙂
In short: it’s a method name.
In Objective-C, a method call works differently than in, say, C++. Ever method call in Objective-C really is a call to the C function
objc_msgSendor a variant of it. This function then decides how to actually make the method call. The first argument to this function is the object pointer (self), the second is the selector (_cmd, the method name). Additional arguments are the method arguments. Nowobjc_msgSendlooks up which compiled method needs to be called for the selector and then jumps to it. So the selector “selects” which method of the object gets called.