IOS Location Update with NSTimer [duplicate]

问题

This question already has answers here:

iPhone CLLocationManager updates every 0.5 seconds (2 answers)

Closed 5 years ago.

I want to get location updates exactly once per second. This interval is important for an animation I want to create to keep true-to-life speed over the ground. I understand that [myLocationManager startUpdatingLocation] will automatically poll "didUpdateToLocations", but it is not quite exactly once per second.

Is there any way to use NSTimer to get my location exactly once per second?

Thank you -jj

回答1:

- (void)startUpdatingLocation
    self.locationManager = [CLLocationManager new];
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
    self.locationManager.delegate = self;
    [self.locationManager startUpdatingLocation];

    NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateLocation) userInfo:nil repeats:YES];
}

- (void)updateLocation {
    CLLocation location = self.locationManager.location;
    // do all the work here
}

#pragma mark - CLLocationManagerDelegate

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
    // do nothing here
}

来源：https://stackoverflow.com/questions/23698420/ios-location-update-with-nstimer