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Asked: 2026-06-13T09:21:49+00:00

I am transcribing some C++ code into ObjC. The operator==() that I am looking

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I am transcribing some C++ code into ObjC. The operator==() that I am looking at compares its private members one-by-one and returns true iff they are all true.

What is the equivalent implementation of operator==() in ObjC?

From browsing, I see in ObjC:

  • -isEqual
  • -isEqualTo
  • -isLike
  • == (built-in? not overrideable?)
  • any others I missed?

What is the protocol for these methods? (deep or shallow comparison, etc…?) Which one should I be using to replace an operator==() that compares all its members?

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  1. Editorial Team

    isEqual: is likely what you want to override. Also ensure that hash returns the same value for two objects that are equal.

    There isn’t really a protocol for comparison. Do whatever makes sense for your class. If you’re comparing all members in your operator==() then that’d be deep comparison and yes, use isEqual:.

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