IOS:百度地图学习2

     使用MapView须符合MKMapViewDelegate协议

    建立单视图工程，再建一个新类，该类是自定义的大头针，.h文件如下：

    

#import <Foundation/Foundation.h>

#import <MapKit/MKAnnotation.h>

@interface CustomAnnotation :NSObject<MKAnnotation>

{

    CLLocationCoordinate2D coordinate_;

NSString *title_;

NSString *subtitle_;

}

@property (nonatomic, assign) CLLocationCoordinate2D coordinate;

@property (nonatomic, copy) NSString *title;

@property (nonatomic, copy) NSString *subtitle;

@end

.m 文件如下

#import "CustomAnnotation.h"

@implementation CustomAnnotation

@synthesize coordinate =coordinate_;

@synthesize title = title_;

@synthesize subtitle =subtitle_;

-(void)dealloc

{

[ release];

        [subtitle_ release];

[super dealloc];

}

@end

根视图.h文件：

#import <UIKit/UIKit.h>

#import <MapKit/MapKit.h>

#import "CustomAnnotation.h"

@interface QQViewController :UIViewController<MKMapViewDelegate>

@property (weak, nonatomic) IBOutletMKMapView *map;

@end

根视图.m文件

#import "QQViewController.h"

@interface QQViewController ()

@end

@implementation QQViewController

- (void)viewDidLoad

{

    [superviewDidLoad];

   self.map.delegate =self;

    //设置地图格式

    self.map.mapType = MKMapTypeStandard;

    

    CLLocationCoordinate2D loc =CLLocationCoordinate2DMake(32.0500,118.78333);

    CLLocationDegrees lat = loc.latitude;

    CLLocationDegrees lon = loc.longitude;

    

    CLLocationCoordinate2D theCoordinate;

    //地图中心

    CLLocationCoordinate2D theCenter;

    theCoordinate.latitude = lat;

    theCoordinate.longitude = lon;

    //设置地图坐标显示范围

    MKCoordinateRegion theRegin;

    theCenter.latitude = lat;

    theCenter.longitude = lon;

    theRegin.center = theCenter;

    //地图缩放级别

    MKCoordinateSpan theSpan;

    theSpan.latitudeDelta =0.01;

    theSpan.longitudeDelta =0.01;

    theRegin.span = theSpan;

    [self.mapsetRegion:theRegin];

    [self.mapregionThatFits:theRegin];

    //显示用户位置

    self.map.showsUserLocation =YES;

    //创建大头针

    CustomAnnotation *nan = [[CustomAnnotationalloc]init];

    //大头针标题

    nan.title =@"增加的大头针";

   NSString *locDesc = [NSStringstringWithFormat:@"纬度:%.1f经度:%.1f",lat,lon];

    //标注的位置

    nan.coordinate = loc;

    //大头针副标题

    nan.subtitle = locDesc;

    [self.mapaddAnnotation:nan];

    

// Do any additional setup after loading the view, typically from a nib.

}

#pragma ================MKMapViewDelegate===============================

//改变大头针图表的颜色或者图片

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation

{

   MKAnnotationView *newAnimation = [[MKAnnotationView alloc]initWithAnnotation:annotationreuseIdentifier:annotation.title];

    newAnimation.canShowCallout =YES;

    newAnimation.image = [UIImageimageNamed:@"location"];

   return newAnimation;

}

运行结果：