Question

我想在MKMapView而不是小摇滚中显示图片。有人可以在这里提供一些有用的代码，或者说明如何做到这一点？

谢谢！

修改

-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:
(id <MKAnnotation>)annotation {
MKPinAnnotationView *pinView = nil; 
if(annotation != mapView.userLocation) 
{
    static NSString *defaultPinID = @"com.invasivecode.pin";
    pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
    if ( pinView == nil ) pinView = [[MKPinAnnotationView alloc]
                                      initWithAnnotation:annotation reuseIdentifier:defaultPinID];

    pinView.pinColor = MKPinAnnotationColorGreen; 
    pinView.canShowCallout = YES;
    pinView.animatesDrop = YES;
    pinView.image = [UIImage imageNamed:@"pinks.jpg"];    //as suggested by Squatch
} 
else {
    [mapView.userLocation setTitle:@"I am here"];
}
return pinView;
}

我期待我的图片 pinks.jpg 在地图上，固定位置而不是默认的pin视图（ rock pin shaped ）。但我仍然得到了引脚的默认图像。

Answer 1

如果您想将自己的图片用于注释视图，则应创建MKAnnotationView而不是MKPinAnnotationView。

MKPinAnnotationView是MKAnnotationView的子类，因此它具有image属性，但它通常会覆盖它并绘制图像（这就是它的用途）。

所以将代码更改为：

-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation 
{
    MKAnnotationView *pinView = nil; 
    if(annotation != mapView.userLocation) 
    {
        static NSString *defaultPinID = @"com.invasivecode.pin";
        pinView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
        if ( pinView == nil ) 
            pinView = [[MKAnnotationView alloc]
                                         initWithAnnotation:annotation reuseIdentifier:defaultPinID];

        //pinView.pinColor = MKPinAnnotationColorGreen; 
        pinView.canShowCallout = YES;
        //pinView.animatesDrop = YES;
        pinView.image = [UIImage imageNamed:@"pinks.jpg"];    //as suggested by Squatch
    } 
    else {
        [mapView.userLocation setTitle:@"I am here"];
    }
    return pinView;
}

请注意，animatesDrop也已注释掉，因为该属性仅存在于MKPinAnnotationView。

中

如果您仍希望删除图像注释，则必须自己动手制作动画。您可以搜索Stack Overflow以获取“animatesdrop mkannotationview”，您将找到几个答案。以下是前两个：

Answer 2

这是 Swift 3 的答案。如果可能，它会使注释视图出列，或者如果不是，则创建一个新注释视图：

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    // Don't want to show a custom image if the annotation is the user's location.
    guard !(annotation is MKUserLocation) else {
        return nil
    }

    // Better to make this class property
    let annotationIdentifier = "AnnotationIdentifier"

    var annotationView: MKAnnotationView?
    if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationView(withIdentifier: annotationIdentifier) {
        annotationView = dequeuedAnnotationView
        annotationView?.annotation = annotation
    }
    else {
        annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
        annotationView?.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
    }

    if let annotationView = annotationView {
        // Configure your annotation view here
        annotationView.canShowCallout = true
        annotationView.image = UIImage(named: "yourImage")
    }

    return annotationView
}

Swift 2.2 ：

func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
    // Don't want to show a custom image if the annotation is the user's location.
    guard !annotation.isKindOfClass(MKUserLocation) else {
        return nil
    }

    // Better to make this class property
    let annotationIdentifier = "AnnotationIdentifier"

    var annotationView: MKAnnotationView?
    if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(annotationIdentifier) {
        annotationView = dequeuedAnnotationView
        annotationView?.annotation = annotation
    }
    else {
        let av = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
        av.rightCalloutAccessoryView = UIButton(type: .DetailDisclosure)
        annotationView = av
    }

    if let annotationView = annotationView {
        // Configure your annotation view here
        annotationView.canShowCallout = true
        annotationView.image = UIImage(named: "yourImage")
    }

    return annotationView
}

Answer 3

I agree with with answer of the Anna and i like to show how will look that in swift3.This answer it's with many other options.Like a resize the image, get a list of images from array and ect.

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
        if let annotation = annotation as? PetrolStation {
            let identifier = "pinAnnotation"
            var view: MKAnnotationView
            if let dequeuedView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)
                as? MKPinAnnotationView { // 2
                dequeuedView.annotation = annotation
                view = dequeuedView
            } else {
                // 3
                view = MKAnnotationView(annotation: annotation, reuseIdentifier: identifier)
                view.canShowCallout = true

                //here We put a coordinates where we like to show bubble with text information up on the pin image
                view.calloutOffset = CGPoint(x: -7, y: 7)


                //Here this is a array of images
                let pinImage = PetrolItem[activePlace].imgPetrol?[activePlace]

                //Here we set the resize of the image
                let size = CGSize(width: 30, height: 30)
                UIGraphicsBeginImageContext(size)
                pinImage?.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
                let resizeImage = UIGraphicsGetImageFromCurrentImageContext()
                UIGraphicsEndImageContext()
                view.image = resizeImage

                //Here we like to put into bubble window a singe for detail Informations
                view.rightCalloutAccessoryView = UIButton(type: .detailDisclosure) as UIView
               //Here we make change of standard pin image with our image
                view.image = resizeImage
            }

            return view
        }
        return nil
    }

MKMapView：自定义视图而不是注释引脚

3 个答案: