Question

我需要在地图中为每个注释添加一个Id以通过单击注释中的info按钮打开新的视图控制器，我的问题是准备并执行segue，我创建它，但我不知道如何通过id到segue。

我为注释创建了子类来存储来自JSON的ID

这是我的部分代码：

从JSON获取所有数据：

for location in self.locations {

  let annotation:MyAnnotation = MyAnnotation()
  annotation.title = location["truck_name"] as? String
  annotation.customTruckId = location["truck_id"] as? String
  annotation.coordinate = CLLocationCoordinate2D(latitude: (location["coor_x"] as! NSString).doubleValue, longitude: (location["coor_y"] as! NSString).doubleValue)
  self.AllMapView.addAnnotation(annotation)

  }

我创建的子类：

class MyAnnotation : MKPointAnnotation {
    var customTruckId : String?
}

问题在于segue：

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if (segue.identifier == "ShowTruckFromMap") {

            let des_VC = segue.destination as! TruckDetailsVC

            des_VC.truck_id = "How to get Id here !"
        }
    }


    func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
        if control == view.rightCalloutAccessoryView {

            performSegue(withIdentifier: "ShowTruckFromMap", sender: self)
        }
    }

由于

Answer 1

您可以在不使用Segue的情况下显示您的UIViewController。您必须首先在UIViewController中添加一个标识符：身份检查员 - ＆gt;身份 - ＆gt;故事板ID = TruckDetailsVCIdentifier

func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
        if control == view.rightCalloutAccessoryView {
           let mainStoryboard:UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
           let desController = mainStoryboard.instantiateViewController(withIdentifier: "TruckDetailsVCIdentifier") as! TruckDetailsVC
           let TruckAnnotation = view.annotation as? MyAnnotation
           desController.truck_id = (TruckAnnotation?.customTruckId!)!
           show(desController, sender: self)

        }
    }

Answer 2

我找到答案：

func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
        if control == view.rightCalloutAccessoryView {
            let mainStoryboard:UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
            let desController = mainStoryboard.instantiateViewController(withIdentifier: "TruckDetailsVC") as! TruckDetailsVC

            let TruckAnnotation = view.annotation as? MyAnnotation

            desController.truck_id = (TruckAnnotation?.customTruckId!)!

            show(desController, sender: self)

        }
    }

全部谢谢

在MapKit

2 个答案: