我尝试使用swift创建一个iOS应用,在地图视图上创建注释。在大多数情况下,我已经完成了它,但是,我正在尝试创建一个自定义视图,当用户点击引脚时弹出该视图。以下是放置注释的代码:
let point = MKPointAnnotation()
//This isn't the actual location
let location = CLLocationCoordinate2DMake(1, 1)
point.coordinate = location
point.title = "Title"
point.subtitle = "Description"
map.addAnnotation(point)
map.centerCoordinate = point.coordinate
let mapCamera = MKMapCamera()
mapCamera.centerCoordinate = location
mapCamera.altitude = 300
mapCamera.heading = 180
self.map.camera = mapCamera
此代码将引脚放在正确的位置。但是,假设我有一个具有红色背景的MKAnnotationView对象:
let pointDesc = MKAnnotationView()
pointDesc.backgroundColor = UIColor.redColor()
如何将该视图添加到MKPointAnnotation。最初我认为map.addSubview(pointDesc)
会起作用。但它没有。
有人有任何建议吗?
答案 0 :(得分:3)
您需要在自己设计视图的地方实施viewForAnnotation
。这是我的应用程序的代码片段,它使用红色删除按钮创建一个简单的视图。您可能会了解如何根据需要实现该目标:
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
if annotation is PinAnnotation { // PinAnnotation is my custom annotation class
let pinAnnotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myPin")
pinAnnotationView.pinColor = .Purple
pinAnnotationView.draggable = true
pinAnnotationView.canShowCallout = true
pinAnnotationView.animatesDrop = true
let deleteButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton
deleteButton.frame.size.width = 44
deleteButton.frame.size.height = 44
deleteButton.backgroundColor = UIColor.redColor()
deleteButton.setImage(UIImage(named: "trash"), forState: .Normal)
pinAnnotationView.leftCalloutAccessoryView = deleteButton
return pinAnnotationView
}
return nil
}