iPhone ios4 - 播放背景音频流时更换iPod基座图标 [英] iPhone ios4 - Replacing iPod dock icon whilst playing background audio stream

问题描述

我已经知道如何在ios4上播放后台音频，但是我注意到一些应用程序也用他们自己的应用程序图标替换了iPod底座图标。 （例如，Last.fm& Spotify）。

I've figured out how I can get audio playing in the background on ios4, however I've noticed that some apps also replace the iPod dock icon with their own app icon. (Last.fm & Spotify for example).

他们也可以使用停靠媒体控件暂停和恢复他们的流。

They are also able to use the dock media controls to pause and resume their streams.

有谁知道怎么做？

谢谢

推荐答案

您必须轻松响应远程控制事件。这也让您可以通过耳机控制您的应用。

It's easy you have to respond to the Remote Control Events. This also lets you control your app with the headset.

In say say viewDidLoad call：

In lets say viewDidLoad call:

[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];

你必须同时回复

- (BOOL)canBecomeFirstResponder {
return YES;
}

和

- (void)remoteControlReceivedWithEvent:(UIEvent *)event {
    switch (event.subtype) {
        case UIEventSubtypeRemoteControlTogglePlayPause:
            if (audio.rate == 0.0) {
                [audio play];
            } else {
                [audio pause];
            }
            break;
        case UIEventSubtypeRemoteControlPlay:
            [audio play];
            break;
        case UIEventSubtypeRemoteControlPause:
            [audio pause];
            break;
        default:
            break;
    }
}

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