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Key-value µÄ¼à¿ØÊÇÒ»¸ö MVC Ó¦ÓÃÖзdz£ÓÐÓõļ¼Êõ£¬µ«½Ó¿Ú³óª¹ÅÀÏ¡£KVOController £¨À´×Ô Facebook£©¹¹½¨ÁËÒ»¸ö»ùÓÚ Cocoa µÄ time-tested key-value ¼à¿ØÊµÏÖ£¬Ìṩ¼òµ¥·½±ã¡¢Ḭ̈߳²È«µÄ API¡£ºÃ´¦°üÀ¨£º

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ʹÓ÷½·¨£º[code]// create KVO controller with observer
FBKVOController *KVOController = [FBKVOController controllerWithObserver:self];
// observe clock date property
[KVOController observe:clock keyPath:@"date" options:NSKeyValueObservingOptionInitial|NSKeyValueObservingOptionNew block:^(ClockView *clockView, Clock *clock, NSDictionary *change) {
// update clock view with new value
clockView.date = change[NSKeyValueChangeNewKey];
}];[/code]ÒªÇó£º

iOS 6 or later. OS X 10.7 or later .

Èí¼þÏêÇ飺https://github.com/facebook/KVOController

ÏÂÔØµØÖ·£ºhttps://github.com/facebook/KVOController/releases

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