- (void)addNotificationCenters {
//注冊觀察者監(jiān)聽是否完成播放
[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(moviePlayDidEnd)name:AVPlayerItemDidPlayToEndTimeNotificationobject:nil];
//監(jiān)控狀態(tài)屬性，注意AVPlayer也有一個(gè)status屬性，通過監(jiān)控它的status也可以獲得播放狀態(tài)
[self.playV.playItemaddObserver:selfforKeyPath:@"status"options:NSKeyValueObservingOptionNewcontext:nil];
//監(jiān)控網(wǎng)絡(luò)加載情況屬性
[self.playV.playItemaddObserver:selfforKeyPath:@"loadedTimeRanges"options:NSKeyValueObservingOptionNewcontext:nil];
}
//監(jiān)聽執(zhí)行的方法(緩沖進(jìn)度)
- (void)observeValueForKeyPath:(NSString*)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void*)context {
AVPlayerItem*playerItem = object;
if([keyPathisEqualToString:@"loadedTimeRanges"]) {
NSArray*loadedTimeRanges = [[self.playV.playercurrentItem]loadedTimeRanges];
CMTimeRangetimeRange = [loadedTimeRanges.firstObjectCMTimeRangeValue];//獲取緩沖區(qū)域
floatstartSeconds =CMTimeGetSeconds(timeRange.start);
floatdurationSeconds =CMTimeGetSeconds(timeRange.duration);
NSTimeIntervalresult = startSeconds + durationSeconds;//計(jì)算緩沖總進(jìn)度
NSLog(@"當(dāng)前緩沖%.2f", result);
}
}