Question

I’ve been trying to implement a UIMapView Icon like the one in this picture. Does anybody know how this app is creating that thumbnail?

Edit

Attempting to implement this with the following code:

CLLocationCoordinate2D restaurantLocation = CLLocationCoordinate2DMake(Latitude, Longitude);
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(restaurantLocation, 1000, 1000);

_mapView.region = region;
_mapView.hidden = NO;

_annotation = [[MKPointAnnotation alloc] init];
_annotation.coordinate = restaurantLocation;
//annotation.title = _restaurantInformation 

[_mapView addAnnotation:_annotation];


UIGraphicsBeginImageContext(_mapView.frame.size);
[_mapView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *mapImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

CGSize newSize;
newSize.width = 50; // any width u want
newSize.height= 80; // any height u want
UIGraphicsBeginImageContext(newSize);
[mapImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)]; 
_mapThumbnail.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

Answer 1

Annotation in Mapview with location should be in centre. Now

UIGraphicsBeginImageContext(mapView.frame.size);
[mapView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *mapImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

For creating thumbnail of mapImage resize according

CGSize newSize;
newSize.width = 50; // any width you want
newSize.height= 80; // any height you want
UIGraphicsBeginImageContext(newSize);
[mapImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)]; 
UIImage* thumbnail = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

Another Way is

You can try Google Static Maps API

Here’s sample code

NSString *urlString = @"http://maps.googleapis.com/maps/api/staticmap?center=Berkeley,CA&zoom=14&size=200x200&sensor=false";
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlString]];
UIImage *thumbnail= [UIImage imageWithData:data];
[yourImageView setImage:thumbnail];

Through this you can get static image based on your coordinates.