點擊一個引腳到另一個ViewController

Question

我目前有一個地圖視圖控制器設置一個引腳到一個位置。當點擊這個引腳時，我希望它能夠轉到另一個視圖控制器，但是它在運行時不會執行任何操作。有任何想法嗎？

import UIKit 
import MapKit 

class mapquiz: UIViewController { 
    @IBOutlet weak var mapView: MKMapView! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     let location = CLLocationCoordinate2DMake(33.5206608, -1.8913687) 
     mapView.setRegion(MKCoordinateRegionMakeWithDistance(location, 1500, 1500), animated: true) 

     let pin = PinAnnotation(title: "Birmingham", subtitle:"Second largest city" , coordinate: location) 
     mapView.addAnnotation(pin) 

     func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
      if(segue.identifier == "newView") { 
       var UserViewController = (segue.destination as! UserViewController) 
      } 
     } 
    } 
} 

Answer 1

使用委託方法 - didSelectAnnotationView並做進一步處理

Answer 2

的MKMapViewDelegate有一個名爲mapView(_:didSelect:)方法。你可以在這個方法中執行一個segue。另外，您應該覆蓋prepare(for:sender:)，而不是在viewDidLoad()之內。

import UIKit 
import MapKit 

class mapquiz: UIViewController { 

    @IBOutlet weak var mapView: MKMapView! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     mapView.delegate = self 

     let location = CLLocationCoordinate2DMake(33.5206608, -1.8913687) 
     mapView.setRegion(MKCoordinateRegionMakeWithDistance(location, 1500, 1500), animated: true) 

     let pin = PinAnnotation(title: "Birmingham", subtitle:"Second largest city" , coordinate: location) 
     mapView.addAnnotation(pin) 
    } 

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) { 
     if segue.identifier == "newView" { 
      let userViewController = segue.destination as! UserViewController 
      // TODO: something 
     } 
    } 
} 

extension mapquiz: MKMapViewDelegate { 

    func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) { 
     performSegue(withIdentifier: "newView", sender: nil) 
    } 
}