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简介
地图总是帮助我们找到地方。地图整合到 iOS MapKit框架工作。
涉及的步骤
1. 创建一个简单的应用程序
2. 选择项目文件，然后选择目标，添加MapKit.framework
3. 我们还应该加上Corelocation.framework
4.添加一个IBOutlet ViewController.xib 创建一个MapView，并将它命名为MapView类
5. 现在创建一个新的文件，通过选择 File-> New -> File... -> select Objective C 类然后点击下一步
6. 命名类名为 MapAnnotation 并继承自 NSObject
7. 选择创建
8. 更新内容 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. 现在更新 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. 现在更新 ViewController.h 如下
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
@interface ViewController : UIViewController<MKMapViewDelegate>
{
MKMapView *mapView;
}
@end |
12. 现在更新 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 |
输出
现在，当我们运行程序时，我们会得到的输出如下所示。
当我们地图滚动起来，如下图所示，我们将得到的输出。
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