Annotation with canShowCallout switch viewController - objective-c

Question

I have a problem. I search with google apis to places and let me create a annotation pin on the map. The data is stored in a dict. I try THESE position to transfer with a callout including the data to another ViewController.
Here are Parts of my code:
.h file:
#import <MapKit/MapKit.h>
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import "MapPoint.h"
#define kGOOGLE_API_KEY #"MyGoogleAPIsKey"
#define kBgQueue dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
#interface FirstViewController : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate>
{
CLLocationManager *locationManager;
CLLocationCoordinate2D currentCentre;
BOOL firstLaunch;
int currenDist;
}
- (IBAction)myButton:(UIBarButtonItem *)sender;
- (IBAction)myPosition:(UIBarButtonItem *)sender;
#property (strong, nonatomic) IBOutlet MKMapView *mapView;
#end
.m file:
#implementation FirstViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//Make this controller the delegate for the map view.
self.mapView.delegate = self;
// Ensure that you can view your own location in the map view.
[self.mapView setShowsUserLocation:YES];
//Instantiate a location object.
locationManager = [[CLLocationManager alloc] init];
//Make this controller the delegate for the location manager.
[locationManager setDelegate:self];
//Set some parameters for the location object.
[locationManager setDistanceFilter:kCLDistanceFilterNone];
[locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
firstLaunch=YES;
[_mapView setCenterCoordinate:_mapView.userLocation.coordinate];
}
-(void)plotPositions:(NSArray *)data {
// 1 - Remove any existing custom annotations but not the user location blue dot.
for (id<MKAnnotation> annotation in _mapView.annotations)
{
if ([annotation isKindOfClass:[MapPoint class]])
{
[_mapView removeAnnotation:annotation];
}
}
// 2 - Loop through the array of places returned from the Google API.
for (int i=0; i<[data count]; i++)
{
//Retrieve the NSDictionary object in each index of the array.
NSDictionary* place = [data objectAtIndex:i];
// 3 - There is a specific NSDictionary object that gives us the location info.
NSDictionary *geo = [place objectForKey:#"geometry"];
// Get the lat and long for the location.
NSDictionary *loc = [geo objectForKey:#"location"];
// 4 - Get your name and address info for adding to a pin.
NSString *name = [place objectForKey:#"name"];
NSString *vicinity = [place objectForKey:#"vicinity"];
// 4.5 - Get id for detailed view.
NSString *myId = [place objectForKey:#"id"];
// Create a special variable to hold this coordinate info.
CLLocationCoordinate2D placeCoord;
// Set the lat and long.
placeCoord.latitude=[[loc objectForKey:#"lat"] doubleValue];
placeCoord.longitude=[[loc objectForKey:#"lng"] doubleValue];
// 5 - Create a new annotation.
MapPoint *placeObject = [[MapPoint alloc] initWithName:name address:vicinity coordinate:placeCoord];
[_mapView addAnnotation:placeObject];
NSLog(#"%#", myId);
}
}
-(void)button:(id)sender
{
//here is my main problem ...
}
if i done a misstake or something else tell me that please.
I am grateful for any answer!
okay forget to say I am really new to Obj-C so every tip is usefull for me!
Regards Curtis

Answer 1

As #Anna Karenina said, you can implement the accessory view delegate BUT you must remember to put a UIControl or this method will not be called. Otherwise that view needs to handle its own touch events.
from the documentation:
If the view you specify is also a descendant of the UIControl class,
you can use the map view’s delegate to receive notifications when your
control is tapped. If it does not descend from UIControl, your view is
responsible for handling any touch events within its bounds.
reference