如何在地图中添加UISearchBar？

Question

我正在尝试在iOS7的苹果地图上添加UISearchBar。我在How to search MKMapView with UISearchBar?看到了这个问题，但是这个代码在我的项目中不起作用，因为目前有几种方法已被弃用。

这是代码。

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
@interface ViewController : UIViewController <MKMapViewDelegate, MKAnnotation>
@property (strong, nonatomic) IBOutlet MKMapView *mapView;
@property (strong, nonatomic) IBOutlet UISearchBar *SearchBar;
@end

-(void)searchBarSearchButtonClicked:(UISearchBar *)theSearchBar
    {
        [theSearchBar resignFirstResponder];
        CLGeocoder *geocoder = [[CLGeocoder alloc] init];
        [geocoder geocodeAddressString:theSearchBar.text completionHandler:^(NSArray *placemarks, NSError *error) {
            //Error checking

            CLPlacemark *placemark = [placemarks objectAtIndex:0];
            MKCoordinateRegion region;
            region.center.latitude = placemark.region.center.latitude;
            region.center.longitude = placemark.region.center.longitude;
            MKCoordinateSpan span;
            double radius = placemark.region.radius / 1000; // convert to km

            NSLog(@"[searchBarSearchButtonClicked] Radius is %f", radius);
            span.latitudeDelta = radius / 112.0;

            region.span = span;

            [theMapView setRegion:region animated:YES];
        }];
    }