How to call stopObserving() from navigator.geolocation properly?

user_3935035 0
Viewed 1853

I observer the position of a user like so

_someFunc() {
    navigator.geolocation.watchPosition((position) => {
        ...
    )};
}

_someFunc() is called in an _onPress(). In another onPress() I want to stop the watchPosition. Doing that, I use the stopObserving like (badly?) documented here. On another onPress() I simply call 

_anotherSomeFunc() {
    navigator.geolocation.stopObserving();
}

However, that gives me the warning:

Called stopObserving without existing subscriptions.

I have no idea what to make of it. What kind of subscriptions?

react-native geolocation android javascript ios
1 Answers

You should save the watchId returned by navigator.geolocation.watchPosition , and then call clearWatch:

watchId = navigator.geolocation.watchPosition((position) => {
        ...
    }
);

...

navigator.geolocation.clearWatch(watchId);
navigator.geolocation.stopObserving();
user_11207840
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