关于 swift：自定义图像作为带有两个不同颜色图像的注释图钉

Custom image as annotation pin with two different colour images

我正在尝试为我的图钉注释添加自定义图像，并为某些注释更改自定义图像的颜色。颜色变了。但是，图像不显示。而是显示默认引脚。

这是我的代码：

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class MyPointAnnotation : MKPointAnnotation {
var pinTintColor: UIColor?
}

class ViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate{
@IBOutlet weak var map: MKMapView!

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {

var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier:”myAnnotation”) as? MKPinAnnotationView

if annotationView == nil {
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier:”myAnnotation”)
annotationView?.canShowCallout = true
} else {
annotationView?.annotation = annotation
}

if annotation is MKUserLocation {
return nil
}

if let annotation = annotation as? MyPointAnnotation {
annotationView?.pinTintColor = annotation.pinTintColor
annotationView?.image = UIImage(named:”BLog.png”)
}

return annotationView
}

override func viewDidLoad() {
super.viewDidLoad()
self.map.delegate = self

let annotation1 = MyPointAnnotation()
annotation1.coordinate = CLLocationCoordinate2DMake([LatArray], [LonArray])
annotation1.title = NameArray
annotation1.pinTintColor = .red

let annotation2 = MyPointAnnotation()
annotation2.coordinate = CLLocationCoordinate2DMake([LatArray2], [LonArray2])
annotation2.title = NameArray2
annotation2.pinTintColor = .green
}
}

图像”BLog.png” 位于主包中。
我已将 MKMapView 分配为委托。

但图像仍然不会改变。

您需要使用 MKAnnotationView 而不是 MKPinAnnotationView 为您的 pin 注释添加自定义图像。

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func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKUserLocation {
return nil
}

if // Image pin // {
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier:”image”)
if annotationView == nil {
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier:”image”)
annotationView?.canShowCallout = true
annotationView?.image = UIImage(named:”BLog.png”)

let rightButton: AnyObject! = UIButton(type: UIButtonType.detailDisclosure)
annotationView?.rightCalloutAccessoryView = rightButton as? UIView
}
else {
annotationView?.annotation = annotation
}
return annotationView
} else {
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier:”myAnnotation”) as? MKPinAnnotationView
if annotationView == nil {
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier:”myAnnotation”)
annotationView?.canShowCallout = true
} else {
annotationView?.annotation = annotation
}
if let annotation = annotation as? MyPointAnnotation {
annotationView?.pinTintColor = annotation.pinTintColor
}
return annotationView
}
}

来源：https://www.codenong.com/49164637/

Custom image as annotation pin with two different colour images

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