// // NSObject+BUSafeKVO.h // BUFoundation // // Created by Siwant on 2019/9/2. // Copyright © 2019 Union. All rights reserved. // #import @interface NSObject (BUSafeKVO) - (void)bu_addObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath options:(NSKeyValueObservingOptions)options context:(void *)context; - (void)bu_removeObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath context:(void *)context; - (void)bu_removeObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath; @end