我需要在地图上为不同的 cat_ID 显示不同的注释。在这个问题中，我只包括两个类别。
let item = json["data"].arrayValue
var count = 0
initMK()
dispatch_async(dispatch_get_main_queue()) {
while count < item.count{
let lat = item[count]["comp_lat"].stringValue
let lng = item[count]["comp_lng"].stringValue
if item[count]["ct_id"].stringValue == "783"{
self.state = "Jachthavens"
let poi = MKPointAnnotation()
let coordinates = CLLocationCoordinate2D(latitude: Double(lat)!, longitude: Double(lng)!)
poi.coordinate = coordinates
poi.title = item[count]["comp_name_pub"].stringValue
poi.subtitle = "Jachthavens"
//poi.id
self.mapView.addAnnotation(poi)
self.mapView.reloadInputViews()
}else if item[count]["ct_id"].stringValue == "788"{
self.state = "Watersportwinkels"
let poi = MKPointAnnotation()
let coordinates = CLLocationCoordinate2D(latitude: Double(lat)!, longitude: Double(lng)!)
poi.coordinate = coordinates
poi.title = item[count]["comp_name_pub"].stringValue
poi.subtitle = "Watersportwinkels"
self.mapView.addAnnotation(poi)
self.mapView.reloadInputViews()
}
count = count + 1
}
}
///////// 这是我设置不同图像的 viewForAnnotation 方法，只有在 (state == "Watersportwinkels") 和 (state == "Jachthavens") 时才会出现问题。结果，我在地图上只能看到“Jachthavens”图像，但信息窗口上的详细信息是正确的。
让标识符 = "MyPin"
if annotation.isKindOfClass(MKUserLocation) {
return nil
}
let detailButton: UIButton = UIButton(type: UIButtonType.DetailDisclosure)
// Reuse the annotation if possible
var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier)
if annotationView == nil
{
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: "pin")
annotationView!.canShowCallout = true
if(state == "track")
{
annotationView!.image = UIImage(named: "startpin")
}
else if(state == "pause")
{
annotationView!.image = UIImage(named: "pausepin")
}
else if(state == "stop")
{
annotationView!.image = UIImage(named: "endpin")
}else if (state == "Jachthavens") {
annotationView!.image = UIImage(named: "jachthavenpin")
let deleteButton = UIButton(type: UIButtonType.Custom) as UIButton
deleteButton.frame.size.width = 35
deleteButton.frame.size.height = 35
deleteButton.backgroundColor = UIColor.whiteColor()
deleteButton.setImage(UIImage(named: "jachthaven"), forState: .Normal)
deleteButton.addTarget(self, action: #selector(ViewController.infoClicked(_:)), forControlEvents: .TouchUpInside)
annotationView!.leftCalloutAccessoryView = deleteButton
annotationView?.annotation = annotation
}else if (state == "Watersportwinkels"){
annotationView!.image = UIImage(named: "watersportwinkelspin")
let deleteButton = UIButton(type: UIButtonType.Custom) as UIButton
deleteButton.frame.size.width = 35
deleteButton.frame.size.height = 35
deleteButton.backgroundColor = UIColor.whiteColor()
deleteButton.setImage(UIImage(named: "watersportwinkels"), forState: .Normal)
deleteButton.addTarget(self, action: #selector(ViewController.infoClicked(_:)), forControlEvents: .TouchUpInside)
annotationView!.leftCalloutAccessoryView = deleteButton
annotationView?.annotation = annotation
}
}
else
{
annotationView!.annotation = annotation
}
return annotationView
}