IOS MapView 用法

mapView use method

 1 。地图编程接口；

 2. 可规划的路线；

 3. 设置书签标记；

 4.周边查找服务。

结构 表示 地图上一个点，一个矩形区域，一个大小。 

手机位置服务，导航

typedef struct

{

  CLLocationDegrees latitudeDelta;

  CLLocationDegrees longitudeDelta; 

} MKCoordinateSpan;

typedef struct{

   CLLocationCoordinate2D center;

   MKCoordinateSpan span;

}MKCoordinateRegion; 

1 .h file

 //  Created by denny chen on 12-7-8.

//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.

//

#import <UIKit/UIKit.h>

#import <MapKit/MapKit.h>

@interface MapKitViewViewController : UIViewController

{

    MKMapView *MKMapView;

}

@property (retain, nonatomic) IBOutlet MKMapView *mymapkit;

2 .m file

@implementation MapKitViewViewController

@synthesize mymapkit;

– (void)viewDidLoad

{

    [super viewDidLoad];

    //set display jing wei du

CLLocationCoordinate2D center;

    center.latitude=40.029915;

    center.longitude=116.347082;

    MKCoordinateSpan span;

    span.latitudeDelta=0.2;

    span.longitudeDelta=0.2;

    MKCoordinateRegion region={center,span};

    //set map center location

    [self.mymapkit setRegion:region];

}

– (void)viewDidUnload

{

    [self setMymapkit:nil];

    [super viewDidUnload];

    // Release any retained subviews of the main view.

}

– (void)dealloc {

    [mymapkit release];

    [super dealloc];

}

3 create myAnnotation.h file

#import <Foundation/Foundation.h>

#import <MAPkit/Mapkit.h>

@interface myAnnotation : NSObject <MKAnnotation>

@end 

4 create myAnnotation.m file

 #import “myAnnotation.h”

@implementation myAnnotation

-(CLLocationCoordinate2D) coordinate

{

    CLLocationCoordinate2D center;

    center.latitude=40.029915;

    center.longitude=116.347082;

    return center;

}

-(NSString *) title

{

  return @”北京大学“;

}

-(NSString *) subtitle

{

    return @”你所查寻的位置“;

}

@end

4 run reslut