幾年前開源過一款音樂播放器，最近整理項目，發(fā)現其運行閃退，原來又是iOS13弄出的幺蛾子，沒辦法只有分析奔潰原因了。

//奔潰Log：
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Unsupported action method signature. Must return MPRemoteCommandHandlerStatus or take a completion handler as the second argument.'

image.png

具體來說就是方法需要實現MPRemoteCommandHandlerStatus的函數回調

eg:

...
    // 直接使用sharedCommandCenter來獲取MPRemoteCommandCenter的shared實例
    MPRemoteCommandCenter *commandCenter = [MPRemoteCommandCenter sharedCommandCenter];
    
    // 啟用播放命令 (鎖屏界面和上拉快捷功能菜單處的播放按鈕觸發(fā)的命令)
    commandCenter.playCommand.enabled = YES;
    // 為播放命令添加響應事件, 在點擊后觸發(fā)
    [commandCenter.playCommand addTarget:self action:@selector(playAction)];
...
//方法實現需要加上MPRemoteCommandHandlerStatus回調
-(MPRemoteCommandHandlerStatus)playAction
{
    [[MusicViewController sharedInstance].streamer play];
    return MPRemoteCommandHandlerStatusSuccess;
}

以上

源碼地址：
https://github.com/liunianhuaguoyanxi/ZWTMusicPlayer