Daniel Bocksteger - 1 year ago 73

iOS Question

Is it possible to get the current iPads direction like North, East, South, or West for example by CLLocationManager?

Answer Source

This is for rotating pin in which direction its move so might be it will helpful for you and by pin angle you will get ipad direction.

```
-(void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading {
// Use the true heading if it is valid.
CLLocationDirection direction = newHeading.magneticHeading;
CGFloat radians = -direction / 180.0 * M_PI;
self.strAccuracy = [NSString stringWithFormat:@"%.1fmi",newHeading.headingAccuracy];
[lblAccuracy setText:self.strAccuracy];
//Rotate Bearing View
[self rotateBearingView:bearingView radians:radians];
//For Rotate Niddle
CGFloat angle = RadiansToDegrees(radians);
[self setLatLonForDistanceAndAngle];
[self rotateArrowView:arrowView degrees:(angle + fltAngle)];
}
-(void)rotateArrowView:(UIView *)view degrees:(CGFloat)degrees
{
CGAffineTransform transform = CGAffineTransformMakeRotation(DegreesToRadians(degrees));
view.transform = transform;
}
-(void)setLatLonForDistanceAndAngle
{
dblLat1 = DegreesToRadians(appDelegate.dblLatitude);
dblLon1 = DegreesToRadians(appDelegate.dblLongitude);
dblLat2 = DegreesToRadians(objClsProductSearch.dblLatitude);
dblLon2 = DegreesToRadians(objClsProductSearch.dblLongitude);
fltLat = dblLat2 - dblLat1;
fltLon = dblLon2 - dblLon1;
}
-(float)getAngleFromLatLon
{
//Calculate angle between two points taken from http://www.movable-type.co.uk/scripts /latlong.html
double y = sin(fltLon) * cos(dblLat2);
double x = cos(dblLat1) * sin(dblLat2) - sin(dblLat1) * cos(dblLat2) * cos(dblLon2);
CGFloat angle = RadiansToDegrees(atan2(y, x));
return angle;
}
```