針對不同引腳標註的不同信息

Question

我在我的mapview上放置了兩個不同的引腳。我有每個信息按鈕。信息按鈕將延續到具有圖像視圖（用於保存該地點的圖片）和文本標籤（用於保存關於該地點的信息）的UIViewController。

我的問題是我怎樣才能生成的信息和圖片取決於哪個引腳註釋按鈕被選中。最後一個函數是爲了延續到信息視圖控制器而使用的函數。

class GetToTheStart: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate { 
//map view outlet 
@IBOutlet weak var mapView: MKMapView! 

//defining use of location manager 
let myLocMgr = CLLocationManager() 




    override func viewDidLoad() { 
    super.viewDidLoad() 

    //setting up location request 
    myLocMgr.desiredAccuracy = kCLLocationAccuracyBest 
    myLocMgr.requestWhenInUseAuthorization() 
    myLocMgr.startUpdatingLocation() 
    myLocMgr.delegate = self 
    mapView.delegate = self 

    // coordinates of desired locations for pins 
    var zoo1 = CLLocationCoordinate2DMake(53.347439, -6.291820) 
    var town1 = CLLocationCoordinate2DMake(53.347247, -6.290865) 

    //setting up pin 1 annotation (the zoo) 
    var zoopin = MKPointAnnotation() 
    zoopin.coordinate = zoo1 
    zoopin.title = "Dublin Zoo" 
    zoopin.subtitle = "This this the zoo" 
    mapView.addAnnotation(zoopin) 

    //setting up pin 2 annotation (the town) 
    var townpin = MKPointAnnotation() 
    townpin.coordinate = zoo1 
    townpin.title = "Dublin town" 
    townpin.subtitle = "This this the town" 
    mapView.addAnnotation(townpin) 
} 


    //setting up Pin callout button for segue 
    func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? { 
    if annotation is MKUserLocation { 
    } 
    let reuseIdentifier = "pin" 
    var pin = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseIdentifier) as? MKPinAnnotationView 
    if pin == nil { 
     pin = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseIdentifier) 
     pin!.pinColor = .Red 
     pin!.canShowCallout = true 
     pin!.rightCalloutAccessoryView = UIButton(type: .DetailDisclosure) 
    } else { 
     pin!.annotation = annotation 
    } 
    return pin 
} 



    //performing segue from info button to infoViewController 
    func mapView(mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) { 
    performSegueWithIdentifier("info", sender: view) 
} 

Answer 1

爲此，您需要覆蓋下面的方法。在這裏我們將得到annotationView，它將觸發segue。

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
    if (segue.identifier == "info") { 
     if let annotation = sender as? MKAnnotationView { 
      let detailViewController = segue.destinationViewController as! DetailViewController 
      detailViewController.titleText = annotation.annotation?.title ?? "" 
      detailViewController.detaileText = annotation.annotation?.subtitle ?? "" 
     } 
    } 
} 

而在detailViewController是一樣的infoViewController，在這裏我有兩個標籤和我有兩個公共變量。這只是爲了避免錯誤，因爲此時我們沒有標籤對象。

這是我的DetailViewController的代碼。

import UIKit 

class DetailViewController: UIViewController { 

@IBOutlet weak var titleLabel: UILabel! 
@IBOutlet weak var detailLabel: UILabel! 


var titleText: String? { didSet { updateUI() } } 
var detaileText: String? { didSet { updateUI() } } 

override func viewDidLoad() { 
    super.viewDidLoad() 
    updateUI() 
} 

private func updateUI() { 
    self.titleLabel?.text = self.titleText 
    self.detailLabel?.text = self.detaileText 
} 
}