当手机突然来电话时,音乐播放不会自动停止,避免影响接听电话,我们还需要手动做中断处理
最早的打算处理是通过AVAudioPlayer的AVAudioPlayerDelegate代理方法实现,中断相关的代理方法有:
- (void)audioPlayerBeginInterruption:(AVAudioPlayer *)player NS_DEPRECATED_IOS(2_2, 8_0);
- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withOptions:(NSUInteger)flags NS_DEPRECATED_IOS(6_0, 8_0);
- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withFlags:(NSUInteger)flags NS_DEPRECATED_IOS(4_0, 6_0);
- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player NS_DEPRECATED_IOS(2_2, 6_0);
目前已经过期,在API中会提示使用AVAudioSession代替
/* AVAudioPlayer INTERRUPTION NOTIFICATIONS ARE DEPRECATED - Use AVAudioSession instead. */
点进AVAudioSession中,翻到最下面的找到AVAudioSessionDelegate代理方法
#pragma mark -- AVAudioSessionDelegate protocol --
/* The AVAudioSessionDelegate protocol is deprecated. Instead you should register for notifications. */
__TVOS_PROHIBITED
@protocol AVAudioSessionDelegate <NSObject>
@optional
- (void)beginInterruption; /* something has caused your audio session to be interrupted */
/* the interruption is over */
- (void)endInterruptionWithFlags:(NSUInteger)flags NS_AVAILABLE_IOS(4_0); /* Currently the only flag is AVAudioSessionInterruptionFlags_ShouldResume. */
- (void)endInterruption; /* endInterruptionWithFlags: will be called instead if implemented. */
/* notification for input become available or unavailable */
- (void)inputIsAvailableChanged:(BOOL)isInputAvailable;
@end
协议注释中提到AVAudioSessionDelegate protocol也过期了,建议我们使用notifications
接下来就通过通知的方式,对音乐播放器做打断处理
回到之前封装的音乐播放工具类,在init方法中添加监听通知
// 监听事件中断通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(audioSessionInterruptionNotification:) name:AVAudioSessionInterruptionNotification object:nil];
在监听到中断事件通知时,通过通知中的
notification.userInfo[AVAudioSessionInterruptionOptionKey]的Value可以判断当前中断的开始和结束,Value为NSNumber类型,所以判断时需要转为本数据类型
当中断开始时,停止播放
当中断结束时,继续播放
// 监听中断通知调用的方法
- (void)audioSessionInterruptionNotification:(NSNotification *)notification{
/*
监听到的中断事件通知,AVAudioSessionInterruptionOptionKey
typedef NS_ENUM(NSUInteger, AVAudioSessionInterruptionType)
{
AVAudioSessionInterruptionTypeBegan = 1, 中断开始
AVAudioSessionInterruptionTypeEnded = 0, 中断结束
}
*/
int type = [notification.userInfo[AVAudioSessionInterruptionOptionKey] intValue];
switch (type) {
case AVAudioSessionInterruptionTypeBegan: // 被打断
[self.audioPlayer pause]; // 暂停播放
break;
case AVAudioSessionInterruptionTypeEnded: // 中断结束
[self.audioPlayer play]; // 继续播放
break;
default:
break;
}
}
