Question

I have a mapView using xib file now when i touch in the mapview i want the latitude and longitude of that particular area so there any whey or any sample code which help me in this task.Thanks in Advance.

Answer 1

With iOS 3.2 or greater, it’s probably better and simpler to use a UIGestureRecognizer with the map view instead of trying to subclass it and intercepting touches manually.

First, add the gesture recognizer to the map view:

UITapGestureRecognizer *tgr = [[UITapGestureRecognizer alloc] 
        initWithTarget:self action:@selector(tapGestureHandler:)];
tgr.delegate = self;  //also add <UIGestureRecognizerDelegate> to @interface
[mapView addGestureRecognizer:tgr];
[tgr release];

Next, implement shouldRecognizeSimultaneouslyWithGestureRecognizer and return YES so your tap gesture recognizer can work at the same time as the map’s (otherwise taps on pins won’t get handled automatically by the map):

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer 
    shouldRecognizeSimultaneouslyWithGestureRecognizer
        :(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

Finally, implement the gesture handler:

- (void)tapGestureHandler:(UITapGestureRecognizer *)tgr
{
    CGPoint touchPoint = [tgr locationInView:mapView];

    CLLocationCoordinate2D touchMapCoordinate 
        = [mapView convertPoint:touchPoint toCoordinateFromView:mapView];

    NSLog(@"tapGestureHandler: touchMapCoordinate = %f,%f", 
        touchMapCoordinate.latitude, touchMapCoordinate.longitude);
}