我可以在播放新声音时躲避背景音频.但是我无法再次将背景音频级别恢复到最大值.当我的代表试图“解开”它只是一直被躲避.对此的正常修复是AudiosessionSetProperty,但在iOS 7中已弃用,Apple未在弃用警告或文档中提供任何提示.
我在加载视图时调用此方法.
- (void) configureAVAudioSession
{
//get your app's audioSession singleton object
AVAudioSession* session = [AVAudioSession sharedInstance];
//error handling
BOOL success;
NSError* error;
success=[session setCategory:AVAudioSessionCategoryPlayback
withOptions:AVAudioSessionCategoryOptionMixWithOthers error:&error];
if (!success)
{
NSLog(@"AVAudioSession error :%@",error);
}
else
{
}
success = [session setActive:YES error:&error];
if (!success) {
NSLog(@"Error setting active %@",error);
}
else
{
NSLog(@"succes settings active");
}
}
这是我播放音频的时候
-(void)playTimeOnGo
{
NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle]
pathForResource:@"just-like-magic"
ofType:@"mp3"]];
self.audioPlayer = [[AVAudioPlayer alloc]
initWithContentsOfURL:url
error:nil];
self.audioPlayer.delegate=(id<AVAudioPlayerDelegate>)self;
//get your app's audioSession singleton object
AVAudioSession* session = [AVAudioSession sharedInstance];
//error handling
BOOL success;
NSError* error;
success=[session setCategory:AVAudioSessionCategoryPlayback
withOptions:AVAudioSessionCategoryOptionDuckOthers error:&error];
[self.audioPlayer preparetoPlay];
[self.audioPlayer play];
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
}
完成音频以恢复背景音频和取消停止音频时,这是我的代表
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)data successfully:(BOOL)flag{
[self configureAVAudioSession];
NSLog(@"playback ended");
}
那么如何在没有弃用API的情况下再次取消背景音乐？调用[self configureAVAudioSession];显然不起作用….
解决方法
女士们,先生们,我为您提供了一个非弃用的工作示例,说明如何在iOS 7中正确使用闪避.
在您的“视图加载方法”中,调用此方法,其中bool设置为YES.这将混合背景音频并准备用于躲避
- (void) configureAVAudioSession:(bool) active
{
//get your app's audioSession singleton object
AVAudioSession* session = [AVAudioSession sharedInstance];
//error handling
BOOL success;
NSError* error;
success=[session setCategory:AVAudioSessionCategoryPlayback
withOptions:AVAudioSessionCategoryOptionMixWithOthers error:&error];
if (!success)
{
NSLog(@"AVAudioSession error :%@",error);
}
else
{
}
success = [session setActive:active error:&error];
if (!success) {
NSLog(@"Error setting active %@",error);
}
else
{
//NSLog(@"success settings active");
}
}
使用此方法播放音频文件.观察如何发生躲避..记得在每个播放新的音频警报时,在此示例中设置代理.在视图加载方法中不要设置一次.
-(void)playTimeOnGo
{
NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle]
//alertName is the name of your audio file without extention. extenstions is,doh extenstion like "mp"
pathForResource:_dataManager.optionsSettings.setStarts.alertName
ofType:_dataManager.optionsSettings.setStarts.alertExtension]];
self.audioPlayer = [[AVAudioPlayer alloc]
initWithContentsOfURL:url
error:nil];
self.audioPlayer.delegate=(id<AVAudioPlayerDelegate>)self;
//get your app's audioSession singleton object
AVAudioSession* session = [AVAudioSession sharedInstance];
//error handling
BOOL success;
NSError* error;
success=[session setCategory:AVAudioSessionCategoryPlayback
withOptions:AVAudioSessionCategoryOptionDuckOthers error:&error];
[self.audioPlayer preparetoPlay];
[self.audioPlayer play];
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
}
代表将在播放后调用此方法并调高背景音乐的音量:)请不要混淆我正在使用线程.如果你愿意,你可以调用方法,但是这会使主线程停止大约一秒甚至两秒钟.所以这对你好,不要使用线程,只需调用[self configureAVAudioSession：NO];
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)data successfully:(BOOL)flag
{
_playBackFinishedDelegateThead = [[NSThread alloc] initWithTarget:self selector:@selector(configureAVAudioSession:) object:NO];
[_playBackFinishedDelegateThead start];
}
此示例已经过100％测试并在我的应用中运行.