后台位置每n分钟更新一次 [英] Background location update every n minutes

问题描述

我正在编写一个需要每n分钟更新一次位置的应用程序，即使该应用程序处于后台模式，它也会将数据发送到服务器.我已经完成了很多有关此任务的链接.我发现正确的解决方案是使用计时器并将其作为后台任务.

I'm writing an application that requires location updates every n minutes and sends data to a server even when the application is in background mode. I have gone through so many links about this task. As I found the proper solution is to use a timer and make it as a background task.

对此，我有两个问题:

1. 如何实施这些常规的后台位置更新?我了解到Apple只允许在一定时间内执行后台任务.那么我该如何使长时间运行的后台计时器呢?
2. 苹果会否采用这种逻辑拒绝应用程序?

推荐答案

内部appdelegate这样的创建方法

inside appdelegate create method like this

      func getLocation()
      {
              locationManager.allowsBackgroundLocationUpdates = true
              locationManager.delegate = self
              locationManager.desiredAccuracy = kCLLocationAccuracyBest             
              locationManager.startUpdatingLocation()
      }

Appdelegate中的

内部didFinishLaunchingWithOptions方法

inside didFinishLaunchingWithOptions method in appdelegate

var n = 10 //seconds

var timer = Timer.scheduledTimer(timeInterval: n, target: self, selector: #selector(getLocation), userInfo: nil, repeats: true)

设置cllocationmanager的委托方法

set the delegate method for cllocationmanager

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
  {
    locationManager.stopUpdatingLocation()
    locationManager.delegate = nil
    //get the coordinates or do some code
  }

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