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OC - 地图操作

地图对无涯教程找到位置始终很有帮助。使用MapKit框架将Map集成到iOS中。

涉及步骤

步骤1 - 创建一个基于视图的简单应用程序。

步骤2 - 选择您的项目文件，然后选择目标，然后添加MapKit.framework。

步骤3 - 无涯教程还应该添加Corelocation.framework。

步骤4 - 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..."，然后选择" Objective C class"，然后单击"Next"。

无涯教程网

步骤6 - 将类命名为MapAnnotation，将"sub class of"命名为NSObject。

步骤7 - 选择创建。

步骤8 - 如下更新MapAnnotation.h-

#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

步骤9 - 如下更新 MapAnnotation.m -

#import "MapAnnotation.h"

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

步骤10 - 如下更新 ViewController.h -

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>

@interface ViewController : UIViewController<MKMapViewDelegate> {
   MKMapView *mapView;
}
@end

步骤11 - 如下更新 ViewController.m -

#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;
   
   //将注释添加到我们的地图视图
   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];
}

//添加地图标注点时，缩放到它（1500范围）
- (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