[英]Add Annocation in Alamofire closure
我正在嘗試在地圖上添加來自服務器的位置和標題標簽的注釋,我嘗試這樣做
Services.MyService(pagingParams: pagingparam1, completed: {ret in
self.getAdverts = ret
for elements in self.getAdverts{
let coordinates : CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: CLLocationDegrees(elements.LOCATIONS[0])!, longitude: CLLocationDegrees(elements.LOCATIONS[1])!)
pinCords.coordinate = coordinates
pinCords.title = String(elements.PRICE!)
self.map.addAnnotation(pinCords)
}
})
在 MKMapViewDelegate 中,我嘗試顯示 annocations :
extension MapViewController: MKMapViewDelegate {
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKUserLocation == true
{
return nil
}
let av = MKAnnotationView(annotation: annotation, reuseIdentifier: "offercount")
let annoIcon = UIImageView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
annoIcon.contentMode = .scaleAspectFit
annoIcon.image = UIImage(named: "cancel-red")
lbl.text = annotation.title!
lbl.backgroundColor = UIColor.clear
lbl.textAlignment = .center
lbl.textColor = .white
lbl.alpha = 1
lbl.numberOfLines = 1
lbl.adjustsFontSizeToFitWidth = true
lbl.font = UIFont.systemFont(ofSize: 12)
lbl.layer.masksToBounds = true
av.backgroundColor = AreaColors.advertColor
av.canShowCallout = true
av.frame = CGRect(x: 0, y: 0, width: annoIcon.frame.size.width + lbl.frame.size.width + 4, height: 20)
av.layer.cornerRadius = av.layer.bounds.height/4
let pinlbl = UILabel(frame: CGRect(x:av.layer.bounds.width/2-10, y:av.layer.bounds.height-10, width:20, height:20))
pinlbl.layer.masksToBounds = true
pinlbl.layer.cornerRadius = 20
pinlbl.backgroundColor = AreaColors.advertColor
av.addSubview(pinlbl)
av.addSubview(annoIcon)
av.addSubview(lbl)
return av
}
只有 1 annocation.title
出現其他人沒有。 但是當我點擊任何注釋時,我可以看到標題。
我認為問題是異步關閉,但我真的沒有解決它。 難道我做錯了什么?
看起來您正在重用lbl
並將其添加到每個注釋中,因此您只能在最后一個注釋中看到它。 您必須為每個注釋創建新的UILabel
並將其添加為子視圖,就像使用pinlbl
,因為您現在擁有的是從前一個注釋中刪除lbl
並將其重新添加到下一個注釋,直到它停止並將其保留在地圖上的最后一個注釋中。
只需更改以下內容
annoIcon.image = UIImage(named: "cancel-red")
// create new label here
let lbl = UILabel()
// the rest of your code can stay the same
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