我不想理解非正式议定书,直到现在我知道非正式议定书是一类,但为什么立法者没有一类的名称?
例:
#import <Cocoa/Cocoa.h>
@class FileSystemNode;
@interface AppController : NSObject { // Where is the Category ????
@private
IBOutlet NSBrowser *_browser;
FileSystemNode *_rootNode;
}
@end
Thanks.
非正式议定书not“一类”。
如果某一类别符合议定书(例如@interface MyClass <My protocol>),则保证您能够按My protocol的要求,在该类别上采用所有方法。 (除非这一类别没有实际执行这些类别[联系人可以知道,由于有活力的约束力],这是一个方案错误和 lie,但情况通常并非如此)。
而另一方面,类别则允许你采用一种已经存在的类别,并采用新的方法加以推广(例如,在现有的<条码>
因此,各类别和议定书是相互对立的。
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