ios - 如何向 MapKit CallOuts Swift 3 添加按钮

Question

我正在尝试向我的标注添加一个按钮，以便我可以转换到另一个 View Controller 。然而，标注不会显示附件 View ，我不确定为什么。我从 firebase 获取一些数据并将其输入到正确的数组中，然后将注释与调用一起发布。我不确定为什么按钮没有显示。

此代码发生在 ViewDidLoad(){...}

 bookRef.observeSingleEvent(of: .value, with: {snapshot in


            if let userDict = snapshot.value as? [String:AnyObject]{

                for each in userDict as [String:AnyObject]{

                    let bookLats = each.value["bookLat"] as! String

                    let bookLngs = each.value["bookLng"] as! String

                    let bookTitle = each.value["title"] as! String

                    let Author = each.value["Author"] as! String
                    let Comment = each.value["Comment"] as! String
                    let Genre = each.value["Genre"] as! String
                    let User = each.value["User"] as! String
                    let bookPhoto = each.value["bookPhoto"] as! String
                    let userID = each.value["userID"] as! String
                    let userLocation = each.value["userLocation"] as! String
                    let bookRate = each.value["bookRating"] as! String
                    let userToBePushed = each.value["pushingID"] as! String


                    self.bookLatArrayDouble.append((bookLats as NSString).doubleValue)

                    self.bookLngArrayDouble.append((bookLngs as NSString).doubleValue)

                    self.bookTitlesArray.append(bookTitle)



                }



            }



        for i in 0...(self.bookLatArrayDouble.count-1){

           let locationCoordinates = CLLocationCoordinate2D(latitude: self.bookLatArrayDouble[i], longitude: self.bookLngArrayDouble[i])


            var point = BookAnnotation(coordinate: locationCoordinates)

            point.title = self.bookTitlesArray[i]



             self.Map.addAnnotation(point)


        }

我也用过这个功能。

 func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    // If annotation is not of type RestaurantAnnotation (MKUserLocation types for instance), return nil


    var annotationView = self.Map.dequeueReusableAnnotationView(withIdentifier: "Pin")

    if annotationView == nil{
        annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "Pin")
        annotationView?.canShowCallout = true
        annotationView?.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
    }else{
        annotationView?.annotation = annotation
    }



    return annotationView
}

编辑:请求图像

Answer 1

我犯了一个非常愚蠢的错误...我忘记放入Map.delegate.self，所以该函数从未被实际调用是有道理的。该按钮现在显示谢谢大家的帮助!