how to detect click on annotation mapkit and run action - objective-c

Question

I create one app that have mapkit and I can to add specific annotations in my map and I want when to tap (click) on any annotation do one method or one action but I don't about it.
please guide me . I searching many time in google but don't give correct answer for my question.
this is my code :
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
locationManager = [[CLLocationManager alloc] init];
[self GetMyLocation];
mapView = [[MKMapView alloc]initWithFrame:CGRectMake(0, 0, 320, 500)];
mapView.mapType = MKMapTypeStandard;
mapView.zoomEnabled = YES;
mapView.scrollEnabled = YES;
mapView.showsUserLocation = YES;
[mapView.userLocation setTitle:#"I'm Here"];
[mapView.userLocation setSubtitle:#"Rahnova Corpration"];
[self.view addSubview:mapView];
[self addAnnonations];
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(handleLongPressGesture:)];
[self.mapView addGestureRecognizer:longPressGesture];
}
- (void) addAnnonations{
NSArray *title = [[NSArray alloc]initWithObjects:#"Rome",#"Chelsea", nil];
NSArray *subtitle = [[NSArray alloc]initWithObjects:#"Red",#"Blue", nil];
NSArray *latitude = [[NSArray alloc]initWithObjects:#"35.738000",#"35.739901", nil];
NSArray *longitude = [[NSArray alloc]initWithObjects:#"51.310029",#"51.312018", nil];
NSMutableDictionary *dictionary = [[NSMutableDictionary alloc]init];
[dictionary setObject:title forKey:#"title"];
[dictionary setObject:subtitle forKey:#"subtitle"];
[dictionary setObject:latitude forKey:#"latitude"];
[dictionary setObject:longitude forKey:#"longitude"];
for (int i = 0; i <= 1; i++) {
NSString *Name = [[dictionary objectForKey:#"title"]objectAtIndex:i];
NSString *SubName = [[dictionary objectForKey:#"subtitle"]objectAtIndex:i];
double Lati = [[[dictionary objectForKey:#"latitude"]objectAtIndex:i] doubleValue];
double Long = [[[dictionary objectForKey:#"longitude"]objectAtIndex:i] doubleValue];
[self SetTitle:Name SetSubtitle:SubName SetLatitude:Lati SetLongitude:Long];
}
}
- (void) SetTitle:(NSString *)title SetSubtitle:(NSString *)subtitle SetLatitude:(double)latitude SetLongitude:(double)longitude{
//create coordinate for use annotation
CLLocationCoordinate2D annoLocation;
annoLocation.latitude = latitude;
annoLocation.longitude = longitude;
Annotation *myAnnonation = [[Annotation alloc]init];
myAnnonation.coordinate = annoLocation;
myAnnonation.title = title;
myAnnonation.subtitle = subtitle;
[self.mapView addAnnotation:myAnnonation];
}
- (void) centerLocation{
//create region
MKCoordinateRegion myRegion;
CLLocationCoordinate2D center;
center.latitude = latitudes;
center.longitude = longitudes;
//span
MKCoordinateSpan span;
span.latitudeDelta = THE_SPAN;
span.longitudeDelta = THE_SPAN;
myRegion.center = center;
myRegion.span = span;
[mapView setRegion:myRegion animated:YES];
}
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle:#"Error" message:#"Failed to Get Your Location" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[errorAlert show];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
longitudes = currentLocation.coordinate.longitude;
latitudes = currentLocation.coordinate.latitude;
[self centerLocation];
}
}
#pragma mark - MKMapViewDelegate
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 800, 800);
[self.mapView setRegion:[self.mapView regionThatFits:region] animated:YES];
}

Answer 1

dude try this :
Xcode 4 iPhone SDK Tutorial - How to add different actions to each annotation-pin HD
or this :
Detecting when MKAnnotation is selected in MKMapView