iOS控制中心音乐控件在iOS 11更新中停止工作(remoteControlReceivedWithEvent不称为iOS 11)
iOS控制中心音乐控件在iOS 11更新中停止工作(remoteControlReceivedWithEvent不称为iOS 11)
提问于 2017-09-26 16:38:19
在iOS 11更新之前，我遇到了iOS控制中心音乐控制方面的问题，“播放暂停”按钮已经启用并正常工作，就像预期的那样。
然而，在iOS 11中，它停止了工作。经过一项研究，我发现在IOS 11中，remoteControlReceivedWithEvent从未被调用过，但在较早的iOS版本(如iOS 9)中，它通常被调用。
我在AppDelegate.m上设置了事件
- (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;
}
}
}此外，我还订阅另一个类中的远程事件，以控制播放/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)];
}
}我想知道为什么不再工作了，我在API中签入了文档，但是我没有看到任何变化。
注意:我检查下列链接时没有运气
iOS - UIEventTypeRemoteControl events not received
https://forums.developer.apple.com/thread/84204
Unable to receive remoteControlReceivedWithEvent - objective c - ios
remoteControlReceivedWithEvent in AVAudio is not being called
回答 2
Stack Overflow用户
回答已采纳
发布于 2017-10-03 19:49:32
最后，我使用remoteCommandCenter和play和pause按钮来解决这个问题，而不是tooglePlayPauseCommand。
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];
}
}];
}Stack Overflow用户
发布于 2017-12-20 01:44:58
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.");
}];
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/46431723
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