用于音频录制应用程序的iOS多任务处理

本文介绍了用于音频录制应用程序的iOS多任务处理的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在编写一个记录音频的应用程序。我正在研究在录音时支持多任务的可行性（在后台）。

I am writing an application that records audio. I am looking into the feasibility of supporting multitasking while doing audio recordings (in the background).

答案似乎是 no 我到目前为止已阅读过，特别是因为该程序旨在释放切换时使用的所有系统资源。

The answer seems to be a no from what I've read so far, especially since the program is meant to release any system resources being used when switched out.

所以我想知道，是否有可能让当我的应用程序继续在后台捕获音频时，用户切换到iOS中的另一个应用程序？

So I am wondering, is it possible to let the user switch to another application in iOS while my application continues to capture audio in the background?

推荐答案

你可以。 Skype会这样做。

You can. Skype does this.

你可能需要设置< key> UIBackgroundModes< / key>< array>< string> audio< / Info.plist中的字符串>< / array> ，您需要确保音频会话处于活动状态/正在运行/切换应用之前的任何内容（假设您不会突然启动录制/播放音乐/当你的应用在后台播放时。）

You presumably need to set <key>UIBackgroundModes</key><array><string>audio</string></array> in Info.plist, and you need to make sure that the audio session is active/running/whatever before you switch apps (the assumption is that you won't suddenly start recording/playing music/whatever when your app is in the background).

文档说audio允许你在后台播放音频，但这可能也适用于录制音频。如果它不起作用，你可以尝试一些事情：

The docs say that "audio" lets you play audio in the background, but presumably this also applies to recording audio. If it doesn't work, there are a few things you could try:

• 设置voip和audio。
• 播放静音（这可能是最容易使用音频队列API）。