我们可以用什么来代替nstimer？ [英] What can we use instead of nstimer?

问题描述

我可以使用 [locationManager startUpdatingLocation] 在后台获取GPS位置，但我不知道如何安排它。我已经使用NSTimer进行调度，但其中很多人说如果应用程序进入后台，NSTimer将过期。

我想知道如何调度方法，如果我们不使用NSTimers。

解决方案

Apple提供了5种应用程序任务，可以在后台运行：

• 在后台播放音频内容给用户的应用，例如音乐播放器应用
  
• 能够随时向用户通知其位置的应用程序，例如导航应用程序。


• 支持语音网络协议（VoIP）的应用程序


• 需要下载和处理新内容的报亭应用程序






当应用程序处于后台时，请参阅此链接以获取位置更新


另请参阅本教程以获得进一步帮助




I can get the GPS location in the background using [locationManager startUpdatingLocation], but I don't know how to schedule it. I have used NSTimer for scheduling but many of them are saying that NSTimer will get expire if the application enters background.

I want to know how to schedule calling the method , if we are not using NSTimers.

解决方案

Apple provides 5 kinds of app task to run in background:

• Apps that play audible content to the user while in the background, such as a music player app
• Apps that keep users informed of their location at all times, such as a navigation app
• Apps that support Voice over Internet Protocol (VoIP)
• Newsstand apps that need to download and process new content
• Apps that receive regular updates from external accessories

Refer this link for location updates while app is in background

Also refer this tutorial for further help

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