如何从 MPRemoteCommandCenter 禁用所有 MPRemoteCommand 对象

Question

Apple doc 表示“您可以通过将其 enabled 属性设置为 NO 来禁用相应的 MPRemoteCommand 对象。”

我推荐了Is there a public way to force MPNowPlayingInfoCenter to show podcast controls?，我能够禁用/启用锁定屏幕控制上的特定命令。

但是我想禁用锁定屏幕控制中的所有控件，因为我正在播放收音机并且它不支持任何操作 - “播放/暂停/下一个/上一个”

我尝试了以下代码 sn-p:

MPRemoteCommandCenter *remoteCommandCenter = [MPRemoteCommandCenter sharedCommandCenter];
remoteCommandCenter.previousTrackCommand.enabled = NO;
[remoteCommandCenter.previousTrackCommand removeTarget:self];
remoteCommandCenter.nextTrackCommand.enabled = NO;
[remoteCommandCenter.nextTrackCommand removeTarget:self];
            
remoteCommandCenter.skipBackwardCommand.enabled = NO;
[remoteCommandCenter.skipBackwardCommand removeTarget:self];
remoteCommandCenter.skipForwardCommand.enabled = NO;
[remoteCommandCenter.skipForwardCommand removeTarget:self];
            
remoteCommandCenter.bookmarkCommand.enabled = NO;
[remoteCommandCenter.bookmarkCommand removeTarget:self];

remoteCommandCenter.playCommand.enabled = NO;
[remoteCommandCenter.playCommand removeTarget:self];
            
remoteCommandCenter.pauseCommand.enabled = NO;
[remoteCommandCenter.pauseCommand removeTarget:self];

但是没有用。禁用一切会启用锁定屏幕上的暂停、上一个、下一个按钮。 任何帮助将不胜感激。

Answer 1

是的“您可以通过将其 enabled 属性设置为 NO 来禁用相应的 MPRemoteCommand 对象。”

但是如果您禁用所有按钮，则不要删除目标或添加可能什么都不做的目标。没有文档解释为什么我们必须这样做，但它可以这样做方式。

试试下面的代码就行了。

MPRemoteCommandCenter *remoteCommandCenter = [MPRemoteCommandCenter sharedCommandCenter];
remoteCommandCenter.previousTrackCommand.enabled = NO;
remoteCommandCenter.nextTrackCommand.enabled = NO;
remoteCommandCenter.skipBackwardCommand.enabled = NO;
remoteCommandCenter.skipForwardCommand.enabled = NO;
remoteCommandCenter.bookmarkCommand.enabled = NO;
remoteCommandCenter.playCommand.enabled = NO;
remoteCommandCenter.pauseCommand.enabled = NO;


[remoteCommandCenter.previousTrackCommand addTarget:self action:@selector(actionDoNothing:)];
[remoteCommandCenter.nextTrackCommand addTarget:self action:@selector(actionDoNothing:)];
[remoteCommandCenter.skipBackwardCommand addTarget:self action:@selector(actionDoNothing:)];
[remoteCommandCenter.skipForwardCommand addTarget:self action:@selector(actionDoNothing:)];
[remoteCommandCenter.bookmarkCommand addTarget:self action:@selector(actionDoNothing:)];
[remoteCommandCenter.playCommand addTarget:self action:@selector(actionDoNothing:)];
[remoteCommandCenter.pauseCommand addTarget:self action:@selector(actionDoNothing:)];