Mapbox提供了有关自定义注释图像和自定义注释视图的方便文档:
https://www.mapbox.com/ios-sdk/examples/annotation-views/ https://www.mapbox.com/ios-sdk/examples/marker-image/
然而,似乎无法将这些想法组合在一起并自定义注释视图的图像。基本上我希望做的是有一张照片的注释(用户选择),它也有一个可以在点击时动画的边框。
有没有人遇到这个限制?
答案 0 :(得分:4)
MGLAnnotationView
继承自UIView
,因此您可能用于向视图添加图片的大部分技术也适用于此处。
一种简单的方法是将UIImageView
添加为自定义MGLAnnotationView
子类中的子视图:
class CustomImageAnnotationView: MGLAnnotationView {
var imageView: UIImageView!
required init(reuseIdentifier: String?, image: UIImage) {
super.init(reuseIdentifier: reuseIdentifier)
self.imageView = UIImageView(image: image)
self.addSubview(self.imageView)
self.frame = self.imageView.frame
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override init(frame: CGRect) {
super.init(frame: frame)
}
}
然后在mapView:viewForAnnotation:
中使用该子类:
func mapView(_ mapView: MGLMapView, viewFor annotation: MGLAnnotation) -> MGLAnnotationView? {
guard annotation is MGLPointAnnotation else {
return nil
}
let imageName = "someImageThatYouHaveAddedToYourAppBundle"
// Use the image name as the reuse identifier for its view.
let reuseIdentifier = imageName
// For better performance, always try to reuse existing annotations.
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseIdentifier)
// If there’s no reusable annotation view available, initialize a new one.
if annotationView == nil {
annotationView = CustomImageAnnotationView(reuseIdentifier: reuseIdentifier, image: UIImage(named: imageName)!)
}
return annotationView
}
答案 1 :(得分:0)
func mapView(_ mapView: MGLMapView, imageFor annotation: MGLAnnotation) -> MGLAnnotationImage? {
var annotationImage : MGLAnnotationImage? = nil
annotationImage = MGLAnnotationImage(image:UIImage(named: "imageyouwanttoset", reuseIdentifier: annotation.title)
return annotationImage
}