mkoverlay

问题 I am trying to learn MapKit and am now trying to add an image (not a polygon, circle, rectangle, etc.) as an overlay to the map view. I can't seem to find any sample code to help explain how to do this. So far my code in ViewController.swift is: import UIKit import MapKit import CoreLocation class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate { @IBOutlet var mapView: MKMapView! var locationManager: CLLocationManager! var mapOverlay: MKOverlay! override func

问题 I have a MKCircle on MKMapView. It is user-draggable, but if the user drags the area outside the circle, the map should be moving instead. - (IBAction)createPanGestureRecognizer:(id)sender { _mapView.scrollEnabled=NO; _panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(respondToPanGesture:)]; [_mapView addGestureRecognizer:_panRecognizer]; } -(void)respondToPanGesture:(UIPanGestureRecognizer*)sender { static CGPoint originalPoint; if (sender.state ==

问题 I try to subclass from MKOverlayPathRenderer and implement -createPath - (void)createPath { MKPolyline *line = (id)self.overlay; MKMapPoint *points = line.points; NSUInteger pointCount = line.pointCount; CGMutablePathRef path = CGPathCreateMutable(); CGPathMoveToPoint(path, NULL, points[0].x, points[0].y); for (int i = 1; i < pointCount; i++) { CGPathAddLineToPoint(path, NULL, points[i].x, points[i].y); } [self setPath:path]; } I create overlay here: CLLocationCoordinate2D coordinates[events

问题 I'm having trouble with drawing a line on the map with a stroke. (inside color and outside color) I beleive i'm on the right path and have subclassed mkOverlayView to override the drawing (needs to fill with the road size) so inside drawMapRect... CGFloat lineWidth = MKRoadWidthAtZoomScale(zoomScale); MKMapRect clipRect = MKMapRectInset(mapRect, -lineWidth, -lineWidth); ... CGContextAddPath(context, path); CGContextSetStrokeColorWithColor(context, line.color.CGColor); CGContextSetLineJoin

问题 I need the same filled space around circle on the map as in Reminders app in iOS7. I think need to use the method applyFillPropertiesToContext:atZoomScale or fillPath:inContext: . 回答1: I solved my problem: - (void)drawMapRect:(MKMapRect)mapRect zoomScale:(MKZoomScale)zoomScale inContext:(CGContextRef)context { // Fill full map rect with some color. CGRect rect = [self rectForMapRect:mapRect]; CGContextSaveGState(context); CGContextAddRect(context, rect); CGContextSetFillColorWithColor(context

问题 (Using iOS 5 and Xcode 4.2) I have an MKMapView and want to draw a circle of 1000m radius around the user location. On the surface it would seem that implementing the mapView:viewForAnnotation: map view delegate method, and adding a custom MKAnnotationView for the users location, would be a perfect solution. It would look something like this: - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation { // If it's the user location, return my custom

问题 I'm trying to figure out a way to detect which MKOverlayView (actually MKPolygonView ) was tapped and then change its color. I got it running with this code: - (void)mapTapped:(UITapGestureRecognizer *)recognizer { MKMapView *mapView = (MKMapView *)recognizer.view; MKPolygonView *tappedOverlay = nil; for (id<MKOverlay> overlay in mapView.overlays) { MKPolygonView *view = (MKPolygonView *)[mapView viewForOverlay:overlay]; if (view){ // Get view frame rect in the mapView's coordinate system

问题 I am trying to capture tap event on my MKMapView , this way I can drop a MKPinAnnotation on the point where user tapped. Basically I have a map overlayed with MKOverlayViews (an overlay showing a building) and I would like to give user more information about that Overlay when they tap on it by dropping a MKPinAnnotaion and showing more information in the callout. Thank you. 回答1: You can use a UIGestureRecognizer to detect touches on the map view. Instead of a single tap, however, I would

问题 I am trying to draw a polyline on a map in Swift 2. It all works well, but I get a compiler warning for this code: func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! { if overlay is MKPolyline { let polylineRenderer = MKPolylineRenderer(overlay: overlay) polylineRenderer.strokeColor = UIColor.redColor() polylineRenderer.lineWidth = 5 return polylineRenderer } return nil } This will give me a warning says that ' Result and parameters in mapView

问题 I am implementing an iOS application, and I want to draw a polyline between several given coordinates on the map. I wrote the code and got the polylines being drawn from my point reaching an infinite point. In other words the beginning point of the line starts from the my given lat and long point, but the end of the line is infinite and not the other point. This is my code... I filled the coordinates in a NSMutableArray called routeLatitudes . The array cells are being filled one for latitude