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POMKOverlay route working in Apple Breadcrumb iOS code but not in my app
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  1. POMKOverlay route working in Apple Breadcrumb iOS code but not in my app
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    copied!<p>I am working on an iOS application and want to include the Breadcrumb iOS Mapkit route functionality provided by apple as one of the feature. I have created a UIViewController in the storyboard (as a tab from a tab bar controller) and inserted a MKMapView in it. I have also connected it to the outlet in ThirdViewController shown below. The classes are shown below. I have classes CrumbPath and CrumbPathView exactly as in the Breadcrumb example at <a href="http://developer.apple.com/library/ios/#samplecode/Breadcrumb/Introduction/Intro.html" rel="nofollow">http://developer.apple.com/library/ios/#samplecode/Breadcrumb/Introduction/Intro.html</a></p> <p>Even with the same code, the mkoverlay route does not show in my app. Am I missing something important here. I am not experienced in iOS programming and may have missed something basic.</p> <p>ThirdViewController.h</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; #import &lt;MapKit/MapKit.h&gt; #import "CrumbPath.h" #import "CrumbPathView.h" @interface ThirdViewController : UIViewController &lt;MKMapViewDelegate, CLLocationManagerDelegate&gt; { @private MKMapView *map; CrumbPath *crumbs; CrumbPathView *crumbView; CLLocationManager *locationManager; } @property (nonatomic, retain) IBOutlet MKMapView *map; @property (nonatomic, retain) CLLocationManager *locationManager; @end </code></pre> <p>ThirdViewController.m</p> <pre><code>#import "ThirdViewController.h" @interface ThirdViewController () @end @implementation ThirdViewController @synthesize locationManager, map; - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.wantsFullScreenLayout = YES; self.locationManager = [[CLLocationManager alloc] init]; self.locationManager.delegate = self; self.locationManager.desiredAccuracy = kCLLocationAccuracyBest; [self.locationManager startUpdatingLocation]; [self.view addSubview:self.map]; } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. self.map = nil; self.locationManager.delegate = nil; self.locationManager = nil; } -(void) dealloc { } - (BOOL)shouldAutorotateToInterfaceOrientation (UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation == UIInterfaceOrientationPortrait); } #pragma mark - #pragma mark MapKit - (void) locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { if(newLocation) { if((oldLocation.coordinate.latitude != newLocation.coordinate.latitude) &amp;&amp; (oldLocation.coordinate.longitude != newLocation.coordinate.longitude)) { if(!crumbs) { crumbs = [[CrumbPath alloc] initWithCenterCoordinate:newLocation.coordinate]; [map addOverlay:crumbs]; MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(newLocation.coordinate, 2000, 2000); [map setRegion:region animated:YES]; } else { MKMapRect updateRect = [crumbs addCoordinate:newLocation.coordinate]; if(!MKMapRectIsNull(updateRect)) { MKZoomScale currentZoomScale = (CGFloat)(map.bounds.size.width/map.visibleMapRect.size.width); CGFloat lineWidth = MKRoadWidthAtZoomScale(currentZoomScale); updateRect = MKMapRectInset(updateRect, -lineWidth, -lineWidth); [crumbView setNeedsDisplayInMapRect:updateRect]; } } } } } - (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id&lt;MKOverlay&gt;)overlay { if(!crumbView) { crumbView = [[CrumbPathView alloc] initWithOverlay:overlay]; } return crumbView; } @end </code></pre>
 

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