如何在 ios 应用程序中跨所有视图控制器跟踪用户位置？

Question

我正在构建一个应用程序，该应用程序在应用程序打开时跟踪用户位置并使用 geofire 查询它。我想从用户可能打开的任何视图控制器中更新位置。我想知道如何做到这一点。

目前，我在主视图控制器中设置了 geofire 和位置跟踪。为了让位置跟踪在所有视图控制器中工作，我是否必须对每个单独的视图控制器进行编码以跟踪位置，或者我是否可以将代码放入例如应用程序委托文件中？

Answer 1

您可以将代码放在AppDelegate 中。也许在访问服务器时使用计时器，以便优化性能

参考这个答案： Location Manager update frequency, iphone

Answer 2

可能这段代码会有所帮助，但您必须在所有视图控制器中使用它

var LocationManager = CLLocationManager()
LocationManager.requestWhenInUseAuthorization()

if( CLLocationManager.authorizationStatus() == .authorizedWhenInUse ||
    CLLocationManager.authorizationStatus() ==  .authorizedAlways){

  print("currentLocation = \(LocationManager.location)")

 }

Answer 3

使用HSLocationManager在活动和非活动状态下进行无限位置跟踪。

Location manager that allows getting background location updates every n seconds with desired location accuracy.

Advantage:

OS will never kill our app if the location manager is currently running.

Give periodically location update when it required(range is between 2 - 170 seconds (limited by max allowed background task time))

Customizable location accuracy and time period.

Low memory consumption(Singleton class)

Less battery draining.

Answer 4

放在应用程序中delegate.swift

let locationManager = CLLocationManager()


self.locationManager.requestAlwaysAuthorization() 

// For use in foreground
self.locationManager.requestWhenInUseAuthorization()

if CLLocationManager.locationServicesEnabled() {
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
    locationManager.startUpdatingLocation()
}

//Here Get Late long.
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    guard let locValue: CLLocationCoordinate2D = manager.location?.coordinate else { return }
    print("locations = \(locValue.latitude) \(locValue.longitude)")
}

如何在 ios 应用程序中跨所有视图控制器跟踪用户位置？

How to track user location across all view controllers in an ios app?

ios

firebase

swift

geofire