[英]Add Annocation in Alamofire closure
我正在尝试在地图上添加来自服务器的位置和标题标签的注释,我尝试这样做
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,我尝试显示 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
出现其他人没有。 但是当我点击任何注释时,我可以看到标题。
我认为问题是异步关闭,但我真的没有解决它。 难道我做错了什么?
看起来您正在重用lbl
并将其添加到每个注释中,因此您只能在最后一个注释中看到它。 您必须为每个注释创建新的UILabel
并将其添加为子视图,就像使用pinlbl
,因为您现在拥有的是从前一个注释中删除lbl
并将其重新添加到下一个注释,直到它停止并将其保留在地图上的最后一个注释中。
只需更改以下内容
annoIcon.image = UIImage(named: "cancel-red")
// create new label here
let lbl = UILabel()
// the rest of your code can stay the same
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.