mkmapview MKUserLocation AnnotationView

Question

我试图为我的地图上的注释创建自定义注释视图。我是通过修改协议MKMapViewDelegate和覆盖函数mapView:viewForAnnotation:来做到这一点的。这一切都有效，唯一的问题是我还将showsUserLocation设置为TRUE，这意味着我在mapView:viewForAnnotation:方法中得到的一个“注释”是类MKUserLocation。

我不想让userlocation注释有我的自定义注释视图，我希望那个注释视图显示默认的userlocation注释视图！如何返回用户位置的默认用户位置注释视图或将其排除在注释(mapView:viewForAnnotation:中的注释中)之外？

我试图在UserLocation方法中捕获mapView:viewForAnnotation:，但是我不知道该返回什么！(在本例中，我将返回一个标准的MKAnnotationView，但这看起来并不像默认的UserLocation注释(显然是)。

    if (![[annotation class] isEqual:[MKUserLocation class]]) {

        MKAnnotationView *view = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"customAnnotation"];
        // edit the custom view
        return view;
    }

    MKAnnotationView *view = [[MKAnnotationView alloc] init];
    return view;

Answer 1

要显示用户位置的默认注释，只需在这种情况下返回nil，我是这样做的：

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    // use your custom annotation
    if ([annotation isKindOfClass:[MyAnnotationClass class]]) {
        ...

        return annotationView;
    }

    // use default annotation
    return nil;
}

Answer 2

在viewForAnnotation方法中编写这段代码。在这里，var 'map‘是您的MKMapview的出口；

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



        //Annoation View for current Location

        if(map.userLocation != annotation)

        {
            UIImage *image = [UIImage imageNamed:@"image.png"];
            annotation.image = image;

            return annotation; 


        }

        //Annotation View for current location

         return nil;

    }

Answer 3

创建自定义AnnotationView

#import <MapKit/MapKit.h>

@interface AnnotationView : MKPlacemark

@property (nonatomic, readwrite, assign) CLLocationCoordinate2D coordinate;

@property (nonatomic, strong) NSString *title;
@property (nonatomic, strong) NSString *subtitle;

// you can put here any controllers that you want. (such like UIImage, UIView,...etc)

@end

在.m file中

#import "AnnotationView.h"

@implementation AnnotationView

- (id)initWithCoordinate:(CLLocationCoordinate2D)coordinate addressDictionary:(NSDictionary *)addressDictionary
{
    if ((self = [super initWithCoordinate:coordinate addressDictionary:addressDictionary]))
    {
        self.coordinate = coordinate;
    }
    return self;
}

@end

//使用注释在相关的#import "AnnotationView.h"中添加.m file

CLLocationCoordinate2D pCoordinate ;
pCoordinate.latitude = LatValue;
pCoordinate.longitude = LanValue;

// Create Obj Of  AnnotationView class  

AnnotationView *annotation = [[AnnotationView alloc] initWithCoordinate:pCoordinate addressDictionary:nil] ;

    annotation.title = @"I m Here";
    annotation.subtitle = @"This is Sub Tiitle";

[self.mapView addAnnotation:annotation];

上面的AnnotationView**.**是如何创建的简单示例。