iOS control center音乐控件在iOS 11更新中停止工作(remoteControlReceivedWithEvent不称为iOS 11)
我的iOS control center音乐控件有问题在iOS 11更新之前,播放暂停按钮已启用并正常工作,正如预期的那样 然而,在iOS 11中,它停止了工作。经过研究,我发现在IOS 11中从未调用remoteControlReceivedWithEvent,但在IOS 9等较旧的IOS版本中,它被正常调用 我将事件设置为iOS control center音乐控件在iOS 11更新中停止工作(remoteControlReceivedWithEvent不称为iOS 11),ios,objective-c,iphone,ios11,Ios,Objective C,Iphone,Ios11,我的iOS control center音乐控件有问题在iOS 11更新之前,播放暂停按钮已启用并正常工作,正如预期的那样 然而,在iOS 11中,它停止了工作。经过研究,我发现在IOS 11中从未调用remoteControlReceivedWithEvent,但在IOS 9等较旧的IOS版本中,它被正常调用 我将事件设置为AppDelegate.m - (BOOL)application:(UIApplication *)application didFinishLaunchingWithO
AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Enable background audio listening
// https://developer.apple.com/library/ios/qa/qa1668/_index.html
NSError *error = nil;
if (![[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:&error]) {
NSLog(@"%@", error);
}
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent {
if (receivedEvent.type == UIEventTypeRemoteControl) {
switch (receivedEvent.subtype) {
case UIEventSubtypeRemoteControlPlay:
[[NSNotificationCenter defaultCenter] postNotificationName:kCYCAppDelegatePlayPauseNotificationName object:nil];
break;
case UIEventSubtypeRemoteControlPause:
[[NSNotificationCenter defaultCenter] postNotificationName:kCYCAppDelegatePlayPauseNotificationName object:nil];
break;
case UIEventSubtypeRemoteControlTogglePlayPause:
[[NSNotificationCenter defaultCenter] postNotificationName:kCYCAppDelegatePlayPauseNotificationName object:nil];
break;
default:
break;
}
}
}
我还订阅了另一个类中的远程事件来控制播放/暂停按钮
- (void)subscribeToRemoteControlEvents {
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.1")) {
// Disables the forward/backward buttons and only shows the play button.
// You can't just enable the command, you must subscribe for this to activate, so
// the subscription in this case doesn't do anything.
[MPRemoteCommandCenter sharedCommandCenter].togglePlayPauseCommand.enabled = YES;
[[MPRemoteCommandCenter sharedCommandCenter].togglePlayPauseCommand addTarget:self action:@selector(ignore_removeCommandCenterFired)];
}
[[NSNotificationCenter defaultCenter] addObserver:self forName:kCYCAppDelegatePlayPauseNotificationName object:nil queue:nil usingBlock:^(NSNotification *note, CYCCastManager *observer) {
if (observer.isCastPlaying) {
[observer pause];
}
else {
[observer play:NO];
}
}];
}
- (void)unsubscribeFromRemoteControlEvents {
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.1")) {
[[MPRemoteCommandCenter sharedCommandCenter].togglePlayPauseCommand removeTarget:self action:@selector(ignore_removeCommandCenterFired)];
}
}
我想知道为什么它不再工作了我确实在文档中检查了API中的更改,但是我没有看到更改
注意:我没有运气检查以下链接
最后,我通过使用remoteCommandCenter、播放和暂停按钮而不是tooglePlayPauseCommand解决了这个问题
if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"11.0")){
//NOTE: this is the only way that I find to make this work on IOS 11 its seems to be that togglePlayPauseCommand is not working anymore
MPRemoteCommandCenter* commandCenter = [MPRemoteCommandCenter sharedCommandCenter];
[commandCenter.playCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
[[NSNotificationCenter defaultCenter] postNotificationName:kCYCAppDelegatePlayNotificationName object:nil];
return MPRemoteCommandHandlerStatusSuccess;
}];
[commandCenter.pauseCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
[[NSNotificationCenter defaultCenter] postNotificationName:kCYCAppDelegatePauseNotificationName object:nil];
return MPRemoteCommandHandlerStatusSuccess;
}];
[[NSNotificationCenter defaultCenter] addObserver:self forName:kCYCAppDelegatePlayNotificationName object:nil queue:nil usingBlock:^(NSNotification *note, CYCCastManager *observer) {
if (!observer.isCastPlaying) {
[observer play:NO];
}
}];
[[NSNotificationCenter defaultCenter] addObserver:self forName:kCYCAppDelegatePauseNotificationName object:nil queue:nil usingBlock:^(NSNotification *note, CYCCastManager *observer) {
if (observer.isCastPlaying) {
[observer pause];
}
}];
}
只是被胡安的回答修改了
if(@available(iOS 11, *)) {
MPRemoteCommandCenter* commandCenter = [MPRemoteCommandCenter sharedCommandCenter];
[commandCenter.playCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
[[NSNotificationCenter defaultCenter] postNotificationName:@"RemotePlayCommandNotification" object:nil];
return MPRemoteCommandHandlerStatusSuccess;
}];
[commandCenter.pauseCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
[[NSNotificationCenter defaultCenter] postNotificationName:@"RemotePauseCommandNotification" object:nil];
return MPRemoteCommandHandlerStatusSuccess;
}];
[[NSNotificationCenter defaultCenter] addObserverForName:@"RemotePlayCommandNotification" object:nil queue:nil usingBlock:^(NSNotification * _Nonnull note) {
NSLog(@"Clicked the play button.");
}];
[[NSNotificationCenter defaultCenter] addObserverForName:@"RemotePauseCommandNotification" object:nil queue:nil usingBlock:^(NSNotification * _Nonnull note) {
NSLog(@"Clicked the pause button.");
}];
}