iOS - 訪問地圖

地圖對我們來說始終有助於找到地方。地圖使用 MapKit 框架整合到 iOS 中。

涉及的步驟

步驟 1 - 建立一個基於簡單檢視的應用程式。

步驟 2 - 選擇專案檔案，然後選擇目標，再新增 MapKit.framework。

步驟 3 - 我們還應該新增 Corelocation.framework。

步驟 4 - 將 MapView 新增到 ViewController.xib 中，並建立一個 ibOutlet，將其命名為 mapView。

步驟 5 - 透過選擇檔案 → 新建 → 檔案... → 選擇 Objective C 類，再單擊下一步，建立一個新檔案。

步驟 6 - 將類命名為 MapAnnotation，並將“子類”設定為 NSObject。

步驟 7 - 選擇建立。

步驟 8 - 按如下方式更新 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

步驟 9 - 按如下方式更新 MapAnnotation.m −

#import "MapAnnotation.h"

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

步驟 10 - 按如下方式更新 ViewController.h −

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

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

步驟 11 - 按如下方式更新 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;
   
   // 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

輸出

當執行應用程式時，我們將獲得如下所示的輸出 −

當向上滾動地圖時，我們將獲得如下所示的輸出 −