I'm trying to draw a path (with MKMapView
). But I have:
NSInvalidArgumentException ', reason:' *** - [NSMutableOrderedSet addObject:]: object can not be nil '.
I have this button action with a NSTimer
that calls the function stop
@IBAction func startRoute(sender: UIButton) {
// Timer stop() function
// Each 4 seconds
timer = NSTimer.scheduledTimerWithTimeInterval(4.0, target: self, selector: #selector(ViewController.stop), userInfo: nil, repeats: true)
}
And this is my stop()
function, which puts a "Start Point" and it is going adding the current location to the vector called points
of type var points: [CLLocationCoordinate2D] = []
and draw the path with the addOverlay.
func stop() {
if (self.initialFlag == 0) {
// Put flag to 1
self.initialFlag = 1
// Add a Annotation
let sourceAnnotation = MKPointAnnotation()
sourceAnnotation.title = "Start Point"
sourceAnnotation.coordinate = (self.locationManager.location?.coordinate)!
self.mapView.showAnnotations([sourceAnnotation], animated: true)
}
// Get current point location
let currentLocation = CLLocationCoordinate2DMake((self.locationManager.location?.coordinate.latitude)!,(self.locationManager.location?.coordinate.longitude)!);
// We add points every 4 seconds then draw the map points
self.points.append(currentLocation)
// Draw the path
geodesic = MKGeodesicPolyline(coordinates: &points[0], count: points.count)
// And I have the error in this line below.
self.mapView.addOverlay(self.geodesic, level: .AboveRoads)
}
Hey it looks like if you don't have enought coordinates to create MKGeodesicPolyline it throws an error, My solution was it
if points.count > 1{
geodesic = MKGeodesicPolyline(coordinates: &points[0], count: points.count)
self.mapView.addOverlay(self.geodesic, level: .AboveRoads)
}
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