iOS实用宏

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宏

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__attribute__((unavailable("Invoke the designated initializer")))

__attribute__((objc_designated_initializer))

用法

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@interface ZOCNewsViewController : UIViewController

- (instancetype)initWithNews:(ZOCNews *)news ZOC_DESIGNATED_INITIALIZER;
- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil ZOC_UNAVAILABLE_INSTEAD(initWithNews:);
- (instancetype)init ZOC_UNAVAILABLE_INSTEAD(initWithNews:);

@end