Lockscreen中的iPod控件适用于自己的应用程序 [英] iPod Controls in Lockscreen for own App

问题描述

如何在我自己的应用程序中使用锁屏iPod控件？

How can I use the Lock Screen iPod Controls for my own App?

我尝试了MPNowPlayingInfoCenter，但是如果我设置了信息，它将不会显示在任何地方;不在锁屏上，也不在AppleTV上播放。

I tried MPNowPlayingInfoCenter, but if I set the information it won't be displayed anywhere; Not on the lock-screen and not in airplay on AppleTV.

我使用AVPlayer播放我的音频文件。

I use the AVPlayer to play my audio files.

推荐答案

查看远程控制多媒体文档。

以下是如何在 UIViewController中监听远程控制事件子类。首先，让您的控制器参与响应者链，否则事件将被转发给应用程序代表：

Here’s how to listen for remote control events in a UIViewController subclass. First, make your controller participate in the responder chain, otherwise the events will be forwarded to the app delegate:

- (BOOL)canBecomeFirstResponder
{
    return YES;
}

在适当的情况下，告诉应用程序开始接收事件并使控制器成为第一个响应者：

Where appropriate, tell the application to start receiving events and make your controller the first responder:

// maybe not the best place but it works as an example
- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    [self becomeFirstResponder];
}

然后回复：

- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {

    if (receivedEvent.type == UIEventTypeRemoteControl) {

        switch (receivedEvent.subtype) {

            case UIEventSubtypeRemoteControlTogglePlayPause:
                [self playOrStop: nil];
                break;

            case UIEventSubtypeRemoteControlPreviousTrack:
                [self previousTrack: nil];
                break;

            case UIEventSubtypeRemoteControlNextTrack:
                [self nextTrack: nil];
                break;

            default:
                break;
        }
    }
}

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