Classes/MapViewController.m

/*
     File: MapViewController.m
 Abstract: Secondary view controller used to display the map and found annotations.
  Version: 1.0
 
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 */
 
#import "MapViewController.h"
#import "PlaceAnnotation.h"
 
@interface MapViewController ()
@property (nonatomic, weak) IBOutlet MKMapView *mapView;
@property (nonatomic, strong) PlaceAnnotation *annotation;
@end
 
@implementation MapViewController
 
- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    
    self.navigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;
    
    // adjust the map to zoom/center to the annotations we want to show
    [self.mapView setRegion:self.boundingRegion];
    
    if (self.mapItemList.count == 1)
    {
        MKMapItem *mapItem = [self.mapItemList objectAtIndex:0];
        
        self.title = mapItem.name;
        
        // add the single annotation to our map
        PlaceAnnotation *annotation = [[PlaceAnnotation alloc] init];
        annotation.coordinate = mapItem.placemark.location.coordinate;
        annotation.title = mapItem.name;
        annotation.url = mapItem.url;
        [self.mapView addAnnotation:annotation];
        
        // we have only one annotation, select it's callout
        [self.mapView selectAnnotation:[self.mapView.annotations objectAtIndex:0] animated:YES];
        
        // center the region around this map item's coordinate
        self.mapView.centerCoordinate = mapItem.placemark.coordinate;
    }
    else
    {
        self.title = @"All Places";
        
        // add all the found annotations to the map
        for (MKMapItem *item in self.mapItemList)
        {
            PlaceAnnotation *annotation = [[PlaceAnnotation alloc] init];
            annotation.coordinate = item.placemark.location.coordinate;
            annotation.title = item.name;
            annotation.url = item.url;
            [self.mapView addAnnotation:annotation];
        }
    }
}
 
- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    [self.mapView removeAnnotations:self.mapView.annotations];
}
 
- (NSUInteger)supportedInterfaceOrientations
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
        return UIInterfaceOrientationMaskAll;
    else
        return UIInterfaceOrientationMaskAllButUpsideDown;
}
 
 
#pragma mark - MKMapViewDelegate
 
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    MKPinAnnotationView *annotationView = nil;
    if ([annotation isKindOfClass:[PlaceAnnotation class]])
    {
        annotationView = (MKPinAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:@"Pin"];
        if (annotationView == nil)
        {
            annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"Pin"];
            annotationView.canShowCallout = YES;
            annotationView.animatesDrop = YES;
        }
    }
    return annotationView;
}
 
@end