The respondsToSelector: method returns a Boolean value that indicates whether the receiver implements or inherits a method that Perro respond to a specified message. Lastly, before hiring, start a paid test project, and you will know the developer’s skill in a week or so, so you won’t

In earlier versions of the Cocoa toolchain you could also call a method that the compiler, at compile time, couldn’t determine the existence of. While this may sound like a powerful capability, it was more commonly a source of hair-pulling debugging scenarios. Effectively communicate compli

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