iOS访问地图


地图总是有助于我们找到地点。使用MapKit框架将地图集成到iOS中。

涉及的步骤

第1步 - 创建一个简单的基于视图的应用程序。

第2步 - 选择项目文件,然后选择目标,然后添加MapKit.framework。

第3步 - 我们还应该添加Corelocation.framework。

第4步 - 将MapView添加到ViewController.xib并创建一个ibOutlet并将其命名为mapView。

步骤5 - 选择文件→新建→文件...→创建新文件→选择目标C类,然后单击下一步。

第6步 - 将类命名为MapAnnotation,将“sub class of”命名为NSObject。

第7步 - 选择创建。

第8步 - 更新MapAnnotation.h如下:

#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

第9步 - 更新 MapAnnotation.m 如下 -

#import "MapAnnotation.h"

@implementation MapAnnotation
-(id)initWithTitle:(NSString *)title andCoordinate:
 (CLLocationCoordinate2D)coordinate2d {
   self.title = title;
   self.coordinate =coordinate2d;
   return self;
}
@end

第10步 - 更新 ViewController.h 如下 -

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
@interface ViewController : UIViewController<MKMapViewDelegate> {
   MKMapView *mapView;
}
@end

第11步 - 更新 ViewController.m 如下 -

#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

输出

当我们运行应用程序时,我们将获得如下所示的输出 -

iOS教程

当我们向上滚动地图时,我们将获得如下所示的输出 -

iOS教程