Display a message if the app is unable to retrieve the current position within X seconds

In my current project using ionic3 and angular 4, there are times when retrieving the user's current location can be challenging due to slow internet connection. To address this issue, I would like to implement a feature where if after 30 seconds the app fails to retrieve the user's position, an alert will prompt the user to try again.

 ionViewDidLoad() {
    let loader = this.loadingCtrl.create({
      content : 'Checking Position...'
    })
    loader.present().then(()=>{
      this.geolocation.getCurrentPosition({
        enableHighAccuracy:true,
        timeout: 3000
        }).then((resp) => {
          this.userlng = resp.coords.longitude;
          this.userlat = resp.coords.latitude;
          console.log('latitude '+this.userlat+ ' longitude '+this.userlng);

        })
    })
  }

Answer №1

Utilize the timeout and catchError functions available in Angular's rxjs library to implement a 30-second timeout mechanism and handle errors if location data retrieval fails.

ionViewDidLoad() {
    let loader = this.loadingCtrl.create({
      content : 'Checking Position...'
    })
    loader.present().then(()=>{
      this.geolocation.getCurrentPosition({
        enableHighAccuracy:true,
        timeout: 3000
        }).then((resp) => {
          this.userlng = resp.coords.longitude;
          this.userlat = resp.coords.latitude;
          console.log('latitude '+this.userlat+ ' longitude '+this.userlng);

        }).pipe(timeout(30000),
            catchError(err => {
                alert(" " + err);
                throw("Error: "+ err);
    }))
    })
  }

Ensure to import the catchError and timeout functionalities from rxjs.

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