[英]MKMapViewDelegate + JSON ALAMOFIRE
应用程序从“ moreViewController”上的服务器上下载纬度和经度,我有标签,当我点击图钉时,如何将正确的纬度或经度(以及图像到另一个视图)转换为该标签?
{
"latitude": 40.9233,
"longitude": 20.000,
"image" : "xxxx.xxx/xxx.jpg"
}
{
"latitude": 50.9233,
"longitude": 19.320,
"image" : "xxxx.xxx/yyy.jgp"
}
因此,我将其下载并保存到全局var test = [String:AnyObject]()
Alamofire.request("website").responseJSON { response in
print(response.result) // result of response serialization
let json = response.result.val
print("JSON: \(json)"
let jsonTab = json as? Array<Any>
for item in jsonTab as! [AnyObject] {
self.test["lat"] = item["lat"] as? Double! as AnyObject?
self.test["lng"] = item["lng"] as? Double! as AnyObject?
self.addPin(lat: self.test["lat"] as! Double, lng: self.test["lng"] as! Double)
并添加图钉
func addPin(lat:Double, lng:Double) {
let testPin = CLLocationCoordinate2D(latitude: lat, longitude: lng)
let dropPin = MKPointAnnotation()
dropPin.coordinate = testPin
dropPin.title = "test"
mapView.addAnnotation(dropPin)
}
现在添加右键并选择到下一个视图
func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
self.performSegue(withIdentifier: "more", sender: self)
}
var annotationIdentifier = ""
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
var view = mapView.dequeueReusableAnnotationView(withIdentifier: annotationIdentifier)
if view == nil {
view = MKPinAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
view?.canShowCallout = true
view?.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
} else {
view?.annotation = annotation
}
return view
}
var selectedAnnotation: MKPointAnnotation!
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.destination is moreViewController {
print("123")
let destViewController:moreViewController = segue.destination as! moreViewController
destViewController.lat = "\(latTest)"
}
}
与具有发件人的performSegue
一起使用,而不是传递当前的控制器参考,而是传递所选视图的注释。
func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
self.performSegue(withIdentifier: "more", sender: view.annotation)
}
现在,在prepareForSegue
方法中,访问此sender属性并从中获取注释。
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.destination is moreViewController {
let destViewController:moreViewController = segue.destination as! moreViewController
if let annotation = sender as? MKAnnotation {
destViewController.lat = "\(annotation.coordinate.latitude)"
destViewController.long = "\(annotation.coordinate.longitude)"
}
}
}
注意:您已经在测试字典中设置了lat
和long
值,因此它将覆盖该值,并且仅包含最后一个数组对象的lat
和long
值。
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