iOS开发小结 - 让你的APP后台运行

<AVFoundation/AVFoundation.h>

#pragma mark - 音频播放，让后台一直运行
//播放器
- (AVAudioPlayer *)audioPlayer {
if (_audioPlayer == nil) {
dispatch_queue_t dispatchQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(dispatchQueue, ^(void) {
NSError *audioSessionError = nil;
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
//激活会话
[audioSession setActive:true error:nil];
if ([audioSession setCategory:AVAudioSessionCategoryPlayback error:&audioSessionError]){
NSLog(@"成功设置音频对话.");
} else {
NSLog(@"设置音频对话失败");
}

NSBundle *mainBundle = [NSBundle mainBundle];
NSString *filePath = [mainBundle pathForResource:@"timeBlankSound" ofType:@"mp3"];
NSData *fileData = [NSData dataWithContentsOfFile:filePath];
NSError *error = nil;

_audioPlayer = [[AVAudioPlayer alloc] initWithData:fileData error:&error];

if (_audioPlayer != nil){
_audioPlayer.delegate = self;
//让它无限循环播放
[_audioPlayer setNumberOfLoops:-1];
if ([_audioPlayer prepareToPlay] && [_audioPlayer play]){
NSLog(@"成功播放");
} else {
NSLog(@"播放失败");
}
}
});
}
return _audioPlayer;
}

[self.audioPlayer play];