IOS - 訪問地圖

簡介

地圖總是幫助我們找到地方。地圖整合到 iOS MapKit框架工作。

涉及的步驟

1. 創建一個簡單的應用程序

2. 選擇項目文件，然後選擇目標，添加MapKit.framework

3. 我們還應該加上Corelocation.framework

4.添加一個IBOutlet ViewController.xib 創建一個MapView，並將它命名爲MapView類

5. 現在創建一個新的文件，通過選擇 File-> New -> File... -> select Objective C 類然後點擊下一步

6. 命名類名爲 MapAnnotation 並繼承自 NSObject

7. 選擇創建

8. 更新內容 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

9. 現在更新 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

11. 現在更新 ViewController.h 如下

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

12. 現在更新 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 yiibai 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

現在，當我們運行程序時，我們會得到的輸出如下所示。

當我們地圖滾動起來，如下圖所示，我們將得到的輸出。