如何自定义MKMapView上的大头针显示的地理位置信息

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

{

MKPinAnnotationView *pinview = nil

if (annotation != mapView.userLocation) {

static NSString *defaultId = @"目的地"

pinview = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultId]

if (pinview == nil) {

pinview = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultId] autorelease]

pinview.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]

pinview.pinColor = MKPinAnnotationColorPurple

pinview.canShowCallout = YES

pinview.animatesDrop = YES

pinview.draggable = YES

pinview.selected = YES

}

}

else

{

[mapView.userLocation setTitle:@"I'm here"]

}

return pinview

}

给pinview的pinview.rightCalloutAccessoryView添加一个按钮，实现委托方法

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control

增加按钮的点击响应，切换到一个新的视图，来展示完整的信息

一、先来认识一个协议MKAnnotation

官方文档告诉我们，所有标注的类必须遵守这个协议。所以可以了解，标注这个概念在逻辑属性和视图上是分开的。先来看下这个协议声明了哪些方法：

@protocol MKAnnotation <NSObject>

@property (nonatomic, readonly) CLLocationCoordinate2D coordinate//地理坐标位置

@optional

@property (nonatomic, readonly, copy) NSString *title//标题

@property (nonatomic, readonly, copy) NSString *subtitle//副标题

//拖动时调用

- (void)setCoordinate:(CLLocationCoordinate2D)newCoordinate

@end

二、创建一个系统标注大头针

- (void)viewDidLoad {

[super viewDidLoad]

//初始化地图

mapView =[[MKMapView alloc]initWithFrame:self.view.frame]

//设置代理

mapView.delegate=self

//设置位置

mapView.region=MKCoordinateRegionMake(CLLocationCoordinate2DMake(39.26, 116.3), MKCoordinateSpanMake(1.8, 1))

mapView.mapType=MKMapTypeStandard

//初始化一个大头针类

MKPointAnnotation * ann = [[MKPointAnnotation alloc]init]

//设置大头针坐标

ann.coordinate=CLLocationCoordinate2DMake(39.26, 116.3)

ann.title=@"我"

ann.subtitle=@"看这里"

[mapView addAnnotation:ann]

[self.view addSubview:mapView]

}

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