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2014/10/15 ¤U¤È 10:16:13
iphone Programming Glossary: zspropertywatcherWhen does an associated object get released? http://stackoverflow.com/questions/6039309/when-does-an-associated-object-get-released method and swizzle back the original in order to call up to it. That gets really messy though. The point of the ZSPropertyWatcher class is that KVO requires a standard callback method and I don't want to replace UIImageView's in case it uses one itself... zsFrameChanged self zsShowSpinner self.image void zsImageChanged self zsShowSpinner self.image BOOL showLoadingSpinner ZSPropertyWatcher imageWatcher ZSPropertyWatcher objc_getAssociatedObject self imageWatcherKey return imageWatcher nil void setShowLoadingSpinner.. self.image void zsImageChanged self zsShowSpinner self.image BOOL showLoadingSpinner ZSPropertyWatcher imageWatcher ZSPropertyWatcher objc_getAssociatedObject self imageWatcherKey return imageWatcher nil void setShowLoadingSpinner BOOL aBool ZSPropertyWatcher..
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