Return user's latitude and longitude asynchronously

Question

func getCurrectLocationInfo()-> String {

    var strFormattedAddress : String = ""
    locationManager.requestWhenInUseAuthorization()
    var currentLoc: CLLocation!
    if(CLLocationManager.authorizationStatus() == .authorizedWhenInUse ||
    CLLocationManager.authorizationStatus() == .authorizedAlways) {
       currentLoc = locationManager.location
       print(currentLoc.coordinate.latitude)
       print(currentLoc.coordinate.longitude)
        let latString = String(currentLoc.coordinate.latitude)
        let longString = String(currentLoc.coordinate.longitude)

    }
    self.getaddress(pdblLatitude: latString, withLongitude: longString) { address in
        print(address)
        strFormattedAddress = address

        return strFormattedAddress
    }
}

How to return the current lat long of the user asynchronously. Please guide. Here in above code it is returning empty string

Don't you get `Use of unresolved identifier` error for `latString` and `longString`? — vadian, Jun 08 '20 at 06:26
It is. You try to return something from an asynchronous task. The API is different but the issue is exactly the same. — vadian, Jun 08 '20 at 06:28
every asynchronous task or thing is not same, you can't define everything under same name — iPhone 7, Jun 08 '20 at 06:34
An escaping completion handler is an escaping completion handler regardless of the used parameter types. — vadian, Jun 08 '20 at 06:46

Frankenstein · Accepted Answer · 2020-06-08T05:58:49.033

0

Since the function is asynchronous, you need to modify your function with a completion block, like this:

func getCurrectLocationInfo(completion: @escaping (String) -> Void) {

    var strFormattedAddress : String = ""
    locationManager.requestWhenInUseAuthorization()
    var currentLoc: CLLocation!
    if(CLLocationManager.authorizationStatus() == .authorizedWhenInUse ||
    CLLocationManager.authorizationStatus() == .authorizedAlways) {
       currentLoc = locationManager.location
       print(currentLoc.coordinate.latitude)
       print(currentLoc.coordinate.longitude)
        let latString = String(currentLoc.coordinate.latitude)
        let longString = String(currentLoc.coordinate.longitude)

    }
    self.getaddress(pdblLatitude: latString, withLongitude: longString) { address in
        print(address)
        strFormattedAddress = address
        completion(strFormattedAddress)
    }
}

And you need to call it like this:

LocationManager.shared.getCurrectLocationInfo) { locationInfo in 
    strPlaceSearched = locationInfo
}

edited Jun 08 '20 at 05:58

answered Jun 08 '20 at 05:42

Frankenstein

15,732
4
22
47

Escaping closure captures non-escaping parameter 'completion' – iPhone 7 Jun 08 '20 at 05:45
Check now, I've just updated. – Frankenstein Jun 08 '20 at 05:48
can you please guide what's wrong in my call "strPlaceSearched = LocationManager.shared.getCurrectLocationInfo(completion {success in })" – iPhone 7 Jun 08 '20 at 05:55
Did it work? I'd added how to use the method in my answer. – Frankenstein Jun 08 '20 at 06:15
i have fixed the calling method issue myself as well. – iPhone 7 Jun 08 '20 at 06:21

Return user's latitude and longitude asynchronously

1 Answers1