May 21, 2021 iOS Development Manual
IOS maps help us locate locations, and IOS maps use the MapKit framework.
1. Create a simple View base application
2. Select the project file, then select the target, and then add MapKit.framework.
3. Add Corelocation.framework
4. Add a map view to ViewController.xib and create ibOutlet and name mapView.
5. Create a new file by selecting Objective C class with "File-New -gt; File...", click Next
6. "sub class of of" is NSObject, a class named MapAnnotation
7. Choose to create
8. Update MapAnnotation.h, as shown below
#import <Foundation/Foundation.h> #import <MapKit/MapKit.h> @interface MapAnnotation : NSObject<MKAnnotation> @property (nonatomic, strong) NSString *title; @property (nonatomic, readwrite) CLLocationCoordinate2D coordinate; - (id)initWithTitle:(NSString *)title andCoordinate: (CLLocationCoordinate2D)coordinate2d; @end
9. Update the MapAnnotation .m, as shown below
#import "MapAnnotation.h" @implementation MapAnnotation -(id)initWithTitle:(NSString *)title andCoordinate: (CLLocationCoordinate2D)coordinate2d{ self.title = title; self.coordinate =coordinate2d; return self; } @end
10. Update ViewController.h, as shown below
#import <UIKit/UIKit.h> #import <MapKit/MapKit.h> #import <CoreLocation/CoreLocation.h> @interface ViewController : UIViewController<MKMapViewDelegate> { MKMapView *mapView; } @end
11. Update the ViewController .m, as shown below
#import "ViewController.h" #import "MapAnnotation.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; mapView = [[MKMapView alloc]initWithFrame: CGRectMake(10, 100, 300, 300)]; mapView.delegate = self; mapView.centerCoordinate = CLLocationCoordinate2DMake(37.32, -122.03); mapView.mapType = MKMapTypeHybrid; CLLocationCoordinate2D location; location.latitude = (double) 37.332768; location.longitude = (double) -122.030039; // Add the annotation to our map view MapAnnotation *newAnnotation = [[MapAnnotation alloc] initWithTitle:@"Apple Head quaters" andCoordinate:location]; [mapView addAnnotation:newAnnotation]; CLLocationCoordinate2D location2; location2.latitude = (double) 37.35239; location2.longitude = (double) -122.025919; MapAnnotation *newAnnotation2 = [[MapAnnotation alloc] initWithTitle:@"Test annotation" andCoordinate:location2]; [mapView addAnnotation:newAnnotation2]; [self.view addSubview:mapView]; } // When a map annotation point is added, zoom to it (1500 range) - (void)mapView:(MKMapView *)mv didAddAnnotationViews:(NSArray *)views { MKAnnotationView *annotationView = [views objectAtIndex:0]; id <MKAnnotation> mp = [annotationView annotation]; MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance ([mp coordinate], 1500, 1500); [mv setRegion:region animated:YES]; [mv selectAnnotation:mp animated:YES]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
When you run the application, the output is as follows
When we scroll up the map, the output is as follows