StackOverflow2013

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POAnnotations on MapView: Coordinates
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copied!<p>I have two <code>NSString</code>s (address, and key) which contain the coordinates (longitude and latitude) in form of numbers (34,56789...):</p> <pre><code>NSString *key = [allKeys objectAtIndex:i]; NSObject *obj = [DictionaryMap objectForKey:key]; NSString *address = [NSString stringWithFormat:@"%@", obj]; CLLocationCoordinate2D anyLocation; anyLocation.latitude = [address doubleValue]; anyLocation.longitude = [key doubleValue]; MKPointAnnotation *annotationPoint2 = [[MKPointAnnotation alloc] init]; annotationPoint2.coordinate = anyLocation; annotationPoint2.title = @"Event"; annotationPoint2.subtitle = @"Microsoft's headquarters2"; [mapView addAnnotation:annotationPoint2]; </code></pre> <p>...But I can't understand why it doesn't plot in the same point as the coordinates written. I think this doesn't work:</p> <pre><code>[address doubleValue] </code></pre> <p>So I tried replacing it with:</p> <pre><code>location.latitude = NSNumber/NSString </code></pre> <p>but it gives an error.</p> <p>UPDATE:</p> <p>IN VIEW DID LOAD:</p> <pre><code> UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPressGesture:)]; [self.mapView addGestureRecognizer:longPressGesture]; [mapView.userLocation setTitle:@"I am here"]; </code></pre> <p>..then...</p> <pre><code>-(void)handleLongPressGesture:(UIGestureRecognizer*)sender { // This is important if you only want to receive one tap and hold event if (sender.state == UIGestureRecognizerStateEnded) { [self.mapView removeGestureRecognizer:sender]; } else { // Here we get the CGPoint for the touch and convert it to latitude and longitude coordinates to display on the map CGPoint point = [sender locationInView:self.mapView]; CLLocationCoordinate2D locCoord = [self.mapView convertPoint:point toCoordinateFromView:self.mapView]; // Then all you have to do is create the annotation and add it to the map MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc] init]; annotationPoint.coordinate = locCoord; annotationPoint.title = @"Microsoft"; annotationPoint.subtitle = @"Microsoft's headquarters"; [mapView addAnnotation:annotationPoint]; NSString *latitude = [[NSString alloc] initWithFormat:@"%f",locCoord.latitude]; NSString *longitude = [[NSString alloc] initWithFormat:@"%f", locCoord.longitude]; NSLog(latitude); NSLog(longitude); [[NSUserDefaults standardUserDefaults]setObject:latitude forKey:@"FolderLatitude"]; [[NSUserDefaults standardUserDefaults]setObject:longitude forKey:@"FolderLongitude"]; } } </code></pre> <p>...I then save the coordinates in a JSON file and then read them from the file.</p>

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