[ios6] 基于CoreLocation 的地图demo-优快云博客

本文详细介绍了如何在iOS应用中自定义MKMapView的Callout样式及使用自定义的Annotation对象来展示地图上的标记信息。通过实现MKMapViewDelegate协议，我们可以灵活地控制地图视图的行为和外观。

自定义showCallout 左右view

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation{
    MKAnnotationView *aView=[mapView dequeueReusableAnnotationViewWithIdentifier:@"testMapView"];
    if(!aView){
        aView=[[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:@"testMapView"];
//这里是用的MKPinAnnotationView 初始化 当然也可以用MKAnnotationView 只是用MKAnnotationView就必须对MKAnnotationView对象.image赋值 否则 没有图钉显示标记位置
        aView.canShowCallout=YES;
        //设置是否显示ShowCallout
        
        }
    aView.annotation=annotation;
    UIImageView *imageV=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 30, 30)];
//0,0,30,30是组不错的数据。
    imageV.image=[UIImage imageNamed:@"Default.png"];
    aView.leftCalloutAccessoryView=imageV;


//    aView.image=[UIImage imageNamed:@"Default.png"];

//    aView.image用于修改在地图上标记的图钉


    return aView;

}


实现MKMapViewDelegate协议
并设置当前mapView.delegate

关于annotation

MyAnnotation 用于作为放入MapView annotation数组的对象[放入此数组的id需旅行 <MKAnnotation>协议]
此协议是 readOnly的几个属性的"get"方法实现。因为readOnly 所以无法对其赋值。故传入一个“辞典” 然后在对应的“get”方法中去 词典中去相应的数据。

MyAnnotation.h

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
@interface MyAnnotation : NSObject<MKAnnotation>


+(MyAnnotation*)initWithNSMutableDictionary:(NSMutableDictionary *)ns;

@end


MyAnnotation.m


#import "MyAnnotation.h"

@interface MyAnnotation()
@property NSMutableDictionary *save;

@end

@implementation MyAnnotation

@synthesize save=_save;

+ (MyAnnotation *)initWithNSMutableDictionary:(NSMutableDictionary *)ns{
    MyAnnotation *ma=[[MyAnnotation alloc]init];
    ma.save=ns;
    return ma;
}

#pragma mark - <Annotation>

-(NSString *)title{
    return [self.save objectForKey:@"title"];
}

-(NSString *)subtitle{
    return [self.save objectForKey:@"subTitle"];

}

-(CLLocationCoordinate2D)coordinate{
    CLLocationCoordinate2D result;
    result.latitude=20.0;//纬度
    result.longitude=30.0;//经度
    return result;
}

@end

VC相关

当mapView或annotations 被设置时则执行更新。刷新界面
保证数据同步展示在屏幕。

#import "ViewController.h"
#import <MapKit/MapKit.h>
#import "MyAnnotation.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet MKMapView *myMapView;
@property (strong,nonatomic) NSArray *annotations;
@end

@implementation ViewController

@synthesize myMapView=_myMapView;
@synthesize annotations=_annotations;

-(void)setAnnotations:(NSArray *)annotations{
    if(_annotations!=annotations){
        _annotations=annotations;
        [self update];
    }
}

-(void)setMyMapView:(MKMapView *)myMapView{
    if(_myMapView!=myMapView){
        _myMapView=myMapView;
        [self update];
    }
}

- (void)update{
    if(self.myMapView.annotations){
        [self.myMapView removeAnnotations:self.myMapView.annotations];
    }
    if(self.annotations){
        [self.myMapView addAnnotations:self.annotations];
    }
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSMutableDictionary *nsTemp=[[NSMutableDictionary alloc]init];
    [nsTemp setObject:@"poolo's title" forKey:@"title"];
    [nsTemp setObject:@"poolo's SubTitle" forKey:@"subTitle"];
    self.annotations=@[[MyAnnotation initWithNSMutableDictionary:nsTemp]];
	 
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end