Error in drawing polyLine in ios

Question

I am creating an app, that should display a route between two points.

MKPolyline *routeLine = [MKPolyline polylineWithCoordinates:locations count:2];
[mapView addOverlay:routeLine];

The two locations are stored in the array "locations".

I am getting an error

Implicit conversion of Objective-C pointer type 'NSMutableArray *' to C pointer type 'CLLocationCoordinate2D *' requires a bridged cast

Please help me over this.
Thanks in advance.

Answer 1

This method requires a parameter of type CLLocationCoordinate2D array. You will have to make an array of type CLLocationCoordinate2D. Code will look some kind of this:

CLLocationCoordinate2D *coordsArray = malloc(sizeof(CLLocationCoordinate2D) * locations.count);

int i = 0;
for (CLLocation *loc in locations) {
    coordsArray[i] = loc.coordinate;
    i++;
}

MKPolyline * routeLine = [MKPolyline polylineWithCoordinates:coordsArray 
                        count:locations.count];

free(coordinateArray);

[mapView addOverlay:routeLine];