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

我提到了是否有一种公共方式可以强制 MPNowPlayingInfoCenter 显示播客控件？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一个操作 - “播放/暂停/下一个/上一个”

我尝试了以下代码片段：

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];

然而它没有用。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。

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1 回答 1

6

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

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，但它是这样工作的。

试试下面的代码，这将起作用。

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:)];
于 2016-08-22T13:59:18.647 回答