背景地理位置离子3不更新

Question

离子的背景地理定位插件未更新.我想要的功能是每30秒向插件询问一个lat lng值(如果可用).问题是,它只是给我最初的值,然后背景停止.前景很好,它确实是背景.基本上我无法在后台第一次初始发送后发送请求.

gps.ts

startTracking() {

    console.log('started tracking')
    const config: BackgroundGeolocationConfig = {
      desiredAccuracy: 10,
      stationaryRadius: 20,
      distanceFilter: 30,
      debug: false, //  enable this hear sounds for background-geolocation life-cycle.
      stopOnTerminate: false
    };

    this.backgroundGeolocation.configure(config)
    .subscribe((location: BackgroundGeolocationResponse) => {


      this.zone.run(() => {
        this.lat = location.latitude
        this.lng = location.longitude
        this.bearing = location.bearing
        this.speed = location.speed
        this.accuracy = location.accuracy
        this.timestamp = location.time
      })


      this.backgroundGeolocation.finish(); // FOR IOS ONLY
      this.backgroundGeolocation.stop()

      });


  this.backgroundGeolocation.start();

  }

sendGPS(){
this.optionsService.sendGPS(gpsData).subscribe(result => {
          }
        })
}

stopTracking() {

   this.sendGPS()
}

app.component.ts

constructor(){
 this.sendGPSStart()
 this.interval()
}

sendGPSStart(){
    this.locationTracker.startTracking();
  }

  sendGPSStop(){
    this.locationTracker.stopTracking();
}

interval(){
setInterval(() => {
       this.sendGPSStart()
          this.sendGPSStop()
    }, '30000')

}

Answer 1

查看示例，例如dnchia/Ionic3-Background-Geolocation，您可以在后台配置间隔，以及定期前台发送

GPS.ts

startTracking(interval) {

    console.log('started tracking')
    const config: BackgroundGeolocationConfig = {
      desiredAccuracy: 10,
      stationaryRadius: 20,
      distanceFilter: 30,
      debug: false, //  enable this hear sounds for background-geolocation life-cycle.
      stopOnTerminate: false,
      interval: interval
    };

应用程序组件.ts

interval = 30000;

constructor() {
  this.sendGPSStart()
  this.interval()
}

sendGPSStart(){
  this.locationTracker.startTracking(this.interval);
}

sendGPSStop(){
  this.locationTracker.stopTracking();
}

interval() {
  setInterval(() => {
    this.locationTracker.sendGPS();
  }, this.interval)

}