/*
 * ZGIJKKVOController.h
 *
 * Copyright (c) 2014 Bilibili
 * Copyright (c) 2014 Zhang Rui <bbcallen@gmail.com>
 *
 * This file is part of ijkPlayer.
 *
 * ijkPlayer is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * ijkPlayer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with ijkPlayer; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#import <Foundation/Foundation.h>

@interface ZGIJKKVOController : NSObject

- (id)initWithTarget:(NSObject *)target;

- (void)safelyAddObserver:(NSObject *)observer
               forKeyPath:(NSString *)keyPath
                  options:(NSKeyValueObservingOptions)options
                  context:(void *)context;
- (void)safelyRemoveObserver:(NSObject *)observer
                  forKeyPath:(NSString *)keyPath;

- (void)safelyRemoveAllObservers;

@end
