我想将一个数组复制到另一个数组:
NSMutableArray *itemsCopy = [[NSMutableArray alloc] initWithArray:self.items copyItems:YES];
但我得到错误:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Item copyWithZone:]: unrecognized selector sent to instance 0x5a74900'
*** Call stack at first throw:
(
0 CoreFoundation 0x025afc99 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x026fd5de objc_exception_throw + 47
2 CoreFoundation 0x025b17ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x02521496 ___forwarding___ + 966
4 CoreFoundation 0x02521052 _CF_forwarding_prep_0 + 50
5 CoreFoundation 0x025108fa -[NSObject(NSObject) copy] + 42
6 CoreFoundation 0x025ab732 -[NSArray initWithArray:range:copyItems:] + 290
7 CoreFoundation …