Ios 在Alamofire闭包中添加注释
我正在尝试在地图上添加注释,其中的位置和标题标签来自服务器,我尝试这样做Ios 在Alamofire闭包中添加注释,ios,swift,annotations,mkmapview,Ios,Swift,Annotations,Mkmapview,我正在尝试在地图上添加注释,其中的位置和标题标签来自服务器,我尝试这样做 Services.MyService(pagingParams: pagingparam1, completed: {ret in self.getAdverts = ret for elements in self.getAdverts{ let coordinates : CLLocationCoordinate2D = CL
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,我尝试显示注释:
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
}
绿色视图中有一个标签,图像在下面
只有1个annocation.title
出现,其他人没有。但是,当我单击任何注释时,我都可以看到标题
我认为问题在于异步闭包,但我真的没有解决它。我做错了什么吗?看起来您正在重用
lbl
并将其添加到每个批注中,因此您只能在最后一个批注中看到它。您必须为每个注释创建新的UILabel
,并将其作为子视图添加,方法与使用pinlbl
相同,因为您现在要做的是从上一个注释中删除lbl
,然后将其重新添加到下一个注释中,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
谢谢,我做了很多工作。我使用annocation.title将价格数据发送到annocation,当我单击annocation时,将显示annocation title。我只是用它来发送数据到它里面。如何删除它?您不需要删除它,只需为**MKAnnotationView**的标题创建
UILabel
的新实例即可。可以在注释中传递数据。title
查看我的更新答案。