我想做一个从DateTime src到DateTime? dest的快速简单映射DateTime? dest DateTime? dest这样,如果src == DateTime.MinValue它将设置dest = null 。 有没有一种不需要制作新映射解析器的快速简便的方法来做到这一点? ...
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我正在学习Swift,并且想创建一个MKMapKit的子类来封装某些特定功能,例如检查两点之间的距离并创建自定义注释,并将所有地图代码分成一个类。
我创建了一个类:
class GameMapViewController: MKMapView, MKMapViewDelegate{...}
我在主视图控制器中的代码中初始化类(并将其作为子视图添加到情节提要上的视图,以便可以更轻松地控制它的位置):
gameMap = GameMapViewController(container: mapViewHolder)
当我想从自定义注释中触发segue时,一切设置都正常,并且所有工作都可以进行:
func mapView(mapView: MKMapView!, didSelectAnnotationView view: MKAnnotationView!) {...}
当我点击注释标注时, didSelectAnnotationView
会被调用,但是我没有正在寻找的方法performSegueWithIdentifier
,所有针对类似问题的解决方案都建议我使用...。
(我尝试过将MapKit View放在情节提要上,并更改其类以使用GameMapViewController
但没有GameMapViewController
任何init函数)
我在猜测如何初始化自定义类?
MainViewController.swift:
override func viewDidLoad() {
super.viewDidLoad()
....
// Create the game map
gameMap = GameMapViewController(container: mapViewHolder)
mapViewHolder.addSubview(gameMap)
...
}
GameMapViewController.swift:
import UIKit
import MapKit
class GameMapViewController: MKMapView, MKMapViewDelegate{
var spanQuestion:MKCoordinateSpan = MKCoordinateSpanMake(180, 180)
var spanAnswer:MKCoordinateSpan = MKCoordinateSpanMake(180, 180)
var hasUserCityLocationGuess: Bool = false
var containingView: UIView
override init(){
println ("GameMapViewController init")
containingView = UIView()
super.init(frame: CGRect(x: 0, y: 0, width: 1000, height: 1000))
self.delegate=self
var latDeltaAnswer:CLLocationDegrees = 50
var lngDeltaAnswer:CLLocationDegrees = 50
spanAnswer = MKCoordinateSpanMake(latDeltaAnswer, lngDeltaAnswer)
var latDeltaQuestion:CLLocationDegrees = 180
var lngDeltaQuestion:CLLocationDegrees = 180
spanQuestion = MKCoordinateSpanMake(latDeltaQuestion, lngDeltaQuestion)
}
required init(coder aDecoder: NSCoder) {
containingView = UIView()
super.init(coder: aDecoder)
self.delegate = nil
println ("GameMapViewController init with decoder")
}
convenience init(container: UIView) {
println ("GameMapViewController convenience")
self.init()
self.delegate = self
containingView = container
}
func mapViewDidFinishLoadingMap(mapView: MKMapView!) {
println("mapViewDidFinishLoadingMap")
}
func mapViewWillStartLoadingMap(mapView: MKMapView!) {
self.frame = CGRect (x: 0, y: 0, width: containingView.frame.width, height: containingView.frame.height)
self.contentMode = UIViewContentMode.ScaleAspectFill
superview?.sizeToFit()
var guessPlaceRecognizer = UILongPressGestureRecognizer(target: self, action: "guessPlace:")
guessPlaceRecognizer.minimumPressDuration = 1.0
mapView.addGestureRecognizer(guessPlaceRecognizer)
mapView.mapType = MKMapType.Satellite
}
func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! {
if overlay is MKCircle {
var circleRenderer = MKCircleRenderer(overlay: overlay)
circleRenderer.strokeColor = UIColor.redColor()
circleRenderer.fillColor = UIColor(red: 255, green: 0, blue: 0, alpha: 0.1)
circleRenderer.lineWidth = 1
//userOverlayCircleRender = circleRenderer
return circleRenderer
} else {
return nil
}
}
func guessPlace(gestureRecognizer:UIGestureRecognizer){
let guessPlaceFirst = NSUserDefaults.standardUserDefaults().boolForKey("guess_place_preference")
if guessPlaceFirst {
var touchPoint = gestureRecognizer.locationInView(self)
var newCoord:CLLocationCoordinate2D = self.convertPoint(touchPoint, toCoordinateFromView: self)
var userAnnotation = UserPointAnnotation()
userAnnotation.coordinate = newCoord
self.addAnnotation(userAnnotation)
var getLat: CLLocationDegrees = newCoord.latitude
var getLon: CLLocationDegrees = newCoord.longitude
var circleCenter: CLLocation = CLLocation(latitude: getLat, longitude: getLon)
addRadiusCircle(circleCenter)
hasUserCityLocationGuess = true
}
}
func showCity() {
let location = CLLocationCoordinate2D(latitude: (currentCity["latitude"]! as CLLocationDegrees), longitude: (currentCity["longitude"]! as CLLocationDegrees))
let region:MKCoordinateRegion = MKCoordinateRegionMake(location, self.spanAnswer)
let city: String = currentCity["city"]! as String
let conditions: String = currentCity["description"] as String
let country: String = currentCity["country"]! as String
let address = "\(city), \(country)"
let cityAnnotation = CityPointAnnotation()
cityAnnotation.title = address
cityAnnotation.subtitle = "\(conditions)"
cityAnnotation.coordinate = location
self.setRegion(region, animated: true)
self.addAnnotation(cityAnnotation)
self.selectAnnotation(cityAnnotation, animated: true)
}
func cityInfoClick(sender:UIButton){
//sender.performSegueWithIdentifier("segueCityWebView")
}
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
// Handle any custom annotations.
if annotation is CityPointAnnotation {
// Try to dequeue an existing pin view first.
let reuseId = "CityPointAnnotationView"
var annotationView = self.dequeueReusableAnnotationViewWithIdentifier(reuseId)
if annotationView == nil {
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
annotationView.image = UIImage(named: "marker.png")
annotationView.rightCalloutAccessoryView = UIButton.buttonWithType(.InfoDark) as UIButton
annotationView.canShowCallout = true
return annotationView;
} else {
annotationView.annotation = annotation
}
return annotationView
}
return nil;
}
func mapView(mapView: MKMapView!, didSelectAnnotationView view: MKAnnotationView!) {
println("didSelectAnnotationView")
}
func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
println("calloutAccessoryControlTapped1")
///////////////////
// I want to do a segue here
// but nothing has the method performSegueWithIdentifier (self, mapView, control....)
///////////////////
}
func resetMap(){
self.removeAnnotations(self.annotations)
self.removeOverlays(self.overlays)
var region:MKCoordinateRegion = MKCoordinateRegionMake(self.centerCoordinate, spanQuestion)
self.setRegion(region, animated: true)
hasUserCityLocationGuess = false
}
func addRadiusCircle(location: CLLocation){
var radius = NSUserDefaults.standardUserDefaults().doubleForKey("guess_place_radius") as CLLocationDistance
var circle = MKCircle(centerCoordinate: location.coordinate, radius: radius )
self.removeOverlays(self.overlays)
self.addOverlay(circle)
}
func doGeoCode( cityObject:PFObject ) -> Bool {
....
}
func userCityLocationGuess(userGuessTemp:Int)->NSDictionary {
....
}
}
这是因为您混淆了视图和视图控制器。 您有一个视图( MKMapView
子类,但您正在命名该视图并尝试将其用作控制器。它也可以完成控制器的工作。
因此,您实际上应该有一个拥有并配置地图视图(纯MKMapView
)的视图控制器,然后它可以与segue交互。
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