Ios remoteControlReceivedWithEvent在模拟器中工作,但在设备中不工作
我正在开发一个应用程序,可以播放iPod库中的音乐。我正在通过MPMediaPlayerController播放音乐,方法是从表中检索所选项目并将其传递给局部视图控制器:Ios remoteControlReceivedWithEvent在模拟器中工作,但在设备中不工作,ios,ios8,uiresponder,remote-control,mpmediaplayercontroller,Ios,Ios8,Uiresponder,Remote Control,Mpmediaplayercontroller,我正在开发一个应用程序,可以播放iPod库中的音乐。我正在通过MPMediaPlayerController播放音乐,方法是从表中检索所选项目并将其传递给局部视图控制器: MPMediaItem *item = (MPMediaItem *)self.detailItem; MPMediaItemCollection *collection = [[MPMediaItemCollection alloc] initWithItems:@[item]]; [self.musicPlayer set
MPMediaItem *item = (MPMediaItem *)self.detailItem;
MPMediaItemCollection *collection = [[MPMediaItemCollection alloc] initWithItems:@[item]];
[self.musicPlayer setQueueWithItemCollection:collection];
[self.musicPlayer play];
开始播放音乐。我已在我的Info.plist中设置以下值以启用后台使用:
UIBackgroundModes
>Item 0 - audio
这就行了。当我关闭应用程序时,音乐会一直播放。因此,现在我正试图让控制中心的音频控件向我的应用程序发送消息,因此在阅读了一些内容后,我发现我需要做一些事情。因此,我创建了UIResponder的子类,并添加了以下行:
- (BOOL)canBecomeFirstResponder {
return YES;
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)event {
NSLog(@"CustomApp:remoteControlReceivedWithEvent:%@", event.description);
}
我将我的AppDelegate设置为自定义UIResponder的子类,其中我有:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[MainWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.mainViewController = [[BrowserViewController alloc] initWithNibName:nil bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:self.mainViewController];
self.window.rootViewController = navigationController;
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
return YES;
}
还有这个
- (void)applicationDidEnterBackground:(UIApplication *)application {
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
}
现在,我之所以在这里,是因为它在模拟器中工作,而不是在设备中,我不知道为什么。如果我在模拟器中启动它,打开控制中心并开始按音频控件,则自定义UIResponder中的NSLog会在调试器中显示,但在设备上不会显示。实际上,播放/暂停按钮不起任何作用,如果我按下下一个或上一个按钮,它会转到iPod应用程序上的下一个或上一个曲目并开始播放
这个等式似乎少了一些小东西,但我无法理解。我已经尽可能地搜索了文档,但找不到与此情况相关的任何内容,而且关于此特定功能的文档似乎非常有限。在您的rootViewController中:
- (void)viewDidLoad:(BOOL)animated
{
[super viewDidAppear:animated];
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *setCategoryError = nil;
BOOL success = [audioSession setCategory:AVAudioSessionCategoryPlayback withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker error:&setCategoryError];
if (success) {
NSError *activationError = nil;
success = [audioSession setActive:YES error:&activationError];
if (!success) {
NSLog(@"%@", activationError);
}
}
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
[[UIApplication sharedApplication] endReceivingRemoteControlEvents];
[self resignFirstResponder];
}
- (BOOL)canBecomeFirstResponder
{
return YES;
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)event
{
if (event.type == UIEventTypeRemoteControl) {
NSLog(@"Remote control event %i subtype %i", event.type, event.subtype);
// example for headphones
switch (event.subtype) {
case UIEventSubtypeRemoteControlPlay:
break;
case UIEventSubtypeRemoteControlPause:
break;
case UIEventSubtypeRemoteControlStop:
break;
case UIEventSubtypeRemoteControlTogglePlayPause:
break;
case UIEventSubtypeRemoteControlNextTrack:
break;
case UIEventSubtypeRemoteControlPreviousTrack:
break;
case UIEventSubtypeRemoteControlEndSeekingBackward:
break;
case UIEventSubtypeRemoteControlEndSeekingForward:
break;
default:
break;
}
}
}
用Danilo的答案在
viewDidLoad()
中尝试此代码
-(void)viewDidLoad:(BOOL)animated
{
NSError *setCategoryErr = nil;
NSError *activationErr = nil;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback withOptions:0 error:&setCategoryErr];
[[AVAudioSession sharedInstance] setActive: YES error: &activationErr];
}
我知道这个答案很古老,但我在iOS 10中也遇到了同样的问题。我的模拟器正确显示了锁屏音频控制,但实际设备没有。对我来说,修复方法是确保在设置AVAudioSession的类别时,我没有分配选项:AVAudioSessionCategoryOptionMixWithOthers 这足以使我的设备不显示锁屏音频控件。因此,最终我的解决方案如下:
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker|AVAudioSessionCategoryOptionAllowAirPlay|AVAudioSessionCategoryOptionAllowBluetooth|AVAudioSessionCategoryOptionAllowBluetoothA2DP error:&error];
谢谢你的回复。我从其他地方删除了所有用于此的代码,并像您所说的那样将其放在我的rootViewController中。尽管如此,我还是可以在模拟器中通过拉起控制中心并按下play/pause next/previous(播放/暂停下一个/上一个)来实现这一点,我可以看到NSLog打印出来,但当我在设备上启动它时,它对我的应用程序不做任何操作,并尝试控制播放音乐的最后一个应用程序。还有什么我可能遗漏的吗?在viewDidLoad中,尝试在[super viewDidLoad]
AVAudioSession*audioSession=[AVAudioSession sharedInstance]之后立即添加此代码;n错误*setCategoryError=nil;BOOL success=[audioSession setCategory:AVAudioSessionCategoryPlayback with options:AVAudioSessionCategoryOptionDefaultToSpeaker错误:&setCategoryError];if(success){NSError*activationError=nil;success=[audioSession setActive:YES错误:&activationError];if(!success){[self-trackLog:@“Radio无可用的audioSession!”错误:activationError];}
在viewDidLoad NSError*SetCategorYer=nil中尝试此操作;N错误*激活器R=无;[[AVAudioSession sharedInstance]设置类别:AVAudioSessionCategoryPlayback with options:0错误:&SetCategorYer];[[AVAudioSession sharedInstance]设置活动:是错误:&激活器];