摘要：
From http://willonboy.tk/?p=971主要利用ObjectiveC的C API中函数:void objc_setAssociatedObject(id object, const void *key, id value, objc_AssociationPolicy policy)id objc_getAssociatedObject(id object, const void *key)原理详细参见官方的ObjectiveC Runtime Reference.好了,现在直接写怎么做了.1.在定义类别之前, 引入runtime.#import <objc/run 阅读全文
