当我们点击MKAnnotationView进入源码的时候，我们可以看到在#if TARGET_OS_IPHONE在iphone上面是继承的UIView,这样我们就看Iphone上面的属性。annotation，image，centerOffset，canShowCallout，leftCalloutAccessoryView，rightCalloutAccessoryView等属性。下面我自定义一个大头针的标注对象，把上面的属性都显示出来看哈。这些属性到底是什么。下面是官方的自定义大头针
@interfaceSFAnnotation :NSObject
@property(nonatomic,readwrite)CLLocationCoordinate2Dcoordinate;
+ (MKAnnotationView*)createViewAnnotationForMapView:(MKMapView*)mapView annotation:(id)annotation;
@end
实现
@implementationSFAnnotation
- (NSString*)title
{
return@"这个是标题";
}
// optional
- (NSString*)subtitle
{
return@"这个是子标题";
}
+ (MKAnnotationView*)createViewAnnotationForMapView:(MKMapView*)mapView annotation:(id)annotation
{
MKAnnotationView*returnedAnnotationView =
[mapViewdequeueReusableAnnotationViewWithIdentifier:NSStringFromClass([SFAnnotationclass])];
if(returnedAnnotationView ==nil)
{
returnedAnnotationView =
[[MKAnnotationViewalloc]initWithAnnotation:annotation
reuseIdentifier:NSStringFromClass([SFAnnotationclass])];
returnedAnnotationView.canShowCallout=YES;//这个是标注附件是否显示。这必须要是YES。不然点击标注没有任何效果
returnedAnnotationView.centerOffset=CGPointMake( returnedAnnotationView.centerOffset.x+ returnedAnnotationView.image.size.width/2, returnedAnnotationView.centerOffset.y- returnedAnnotationView.image.size.height/2);
}
else
{
returnedAnnotationView.annotation= annotation;
}
returnreturnedAnnotationView;
}
@end
在UIViewController中的代码
- (void)viewDidLoad {
[superviewDidLoad];
_mapView=[[MKMapViewalloc]initWithFrame:CGRectMake(0,0,320,400)];
_mapView.delegate=self;
[self.viewaddSubview:_mapView];
SFAnnotation*annation=[[SFAnnotationalloc]init];
[annationsetCoordinate:CLLocationCoordinate2DMake(30.23423,104.345354)];
[_mapViewaddAnnotation:annation];
SFAnnotation*annation2=[[SFAnnotationalloc]init];
[annation2setCoordinate:CLLocationCoordinate2DMake(30.63423,104.645354)];
[_mapViewaddAnnotation:annation2];
[_mapViewshowAnnotations:@[annation,annation2]animated:YES];
}
- (nullableMKAnnotationView*)mapView:(MKMapView*)mapView viewForAnnotation:(id)annotation{
MKAnnotationView*returnAnnotationView=nil;
if([annotationisKindOfClass:[SFAnnotationclass]])
{
returnAnnotationView = [SFAnnotationcreateViewAnnotationForMapView:self.mapViewannotation:annotation];
returnAnnotationView.image= [UIImageimageNamed:@"flag.png"];//这是标注显示图片
UIImageView*sfIconView = [[UIImageViewalloc]initWithImage:[UIImageimageNamed:@"SFIcon"]];
returnAnnotationView.leftCalloutAccessoryView= sfIconView;//左标注附件视图
UIButton*rightButton = [UIButtonbuttonWithType:UIButtonTypeDetailDisclosure];
[rightButtonaddTarget:selfaction:@selector(buttonAction)forControlEvents:UIControlEventTouchUpInside];
returnAnnotationView.rightCalloutAccessoryView= rightButton;//右标注附件视图
}
returnreturnAnnotationView;
}
-(void)buttonAction{
NSLog(@"右标注附件视图被点击");
}
效果图如下
