After copy, when we do Pointer difference check ,for NSDate variable failed.
@interface TestDef : NSObject<NSCopying>
TestDef *original = [[TestDef alloc] init];
TestDef *copied = [original copy];
After copy, when we do Pointer difference check, for NSDate variable failed.
Your test isn’t valid.
NSDate objects are immutable, so
-copy is allowed to just increment the reference count. Moreover, on modern systems you’ll find that
NSDate is actually implemented using tagged pointers, so it doesn’t even allocate memory.
Share and Enjoy
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware
let myEmail = "eskimo" + "1" + "@apple.com"