//获取
- Ivar ivar = class_getInstanceVariable([VOLPlayManager class], "_info");
InfoData * infoData = object_getIvar([VOLPlayManager getInstance], ivar);
VLPKVOController *c = [self.avPlayer valueForKey:@"_playerItemKVO"]; if (c!=NULL) { [c safelyAddObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew context:KVO_AVPlayerItem_state]; }
