ARC下
@property (nonatomic, weak/assign) id<MyDelegate> delegate;
相当于
- (void)setDelegate:(id< MyDelegate >)delegate
{
if (_delegate != delegate) {
_delegate = delegate;
}
}
MRC下
@property (nonatomic, strong/retain/copy) id< MyDelegate > delegate;
相当于
- (void)setDelegate:(id< MyDelegate >)delegate
{
if (_delegate != delegate) {
[_delegate release];
_delegate = [delegate retain/copy];
}
}
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