Are keys and values in an NSDictionary ordered?

Question

I mean: Is the order of keys and values in an NSDictionary always the same like how they were specified when initializing the NSDictionary? Or should I better maintain a sep

Answer 1

In fact, you can't even rely on the order being the same when running the program in two different devices, even if it's the exact same program and the exact same version of the operating system.

For example, if you run the program on an iPad Air, the ordering of the elements inside NSDictionary may be different than when running the same program on an iPad Retina, even if the iOS version is exactly the same.

In short, the ordering of elements in NSDictionary must never be relied on. You must always assume they may be in any unspecified order, which may be different on different devices.