如何在多个位置放置引脚mapkit swift

Question

我正尝试使用字符串数组将引脚添加到映射。但它只显示一个引脚不显示地图上的第二个引脚。

func getDirections(enterdLocations:[String]) { 
    let geocoder = CLGeocoder() 
    // array has the address strings 
    for (index, item) in enterdLocations.enumerated() { 
    geocoder.geocodeAddressString(item, completionHandler: {(placemarks, error) -> Void in 
     if((error) != nil){ 
      print("Error", error) 
     } 
     if let placemark = placemarks?.first { 

      let coordinates:CLLocationCoordinate2D = placemark.location!.coordinate 

      let dropPin = MKPointAnnotation() 
      dropPin.coordinate = coordinates 
      dropPin.title = item 
      self.myMapView.addAnnotation(dropPin) 
      self.myMapView.selectAnnotation(dropPin, animated: true) 
    } 
    }) 
    } 

} 

和我通话功能

@IBAction func findNewLocation() 
{ 
    var someStrs = [String]() 
    someStrs.append("6 silver maple court brampton") 
    someStrs.append("shoppers world brampton") 
    getDirections(enterdLocations: someStrs) 
} 

Answer 1

你只有一个针回来，因为你仅配置了一个let geocoder = CLGeocoder()所以只是动议到for循环，它会像这样：

func getDirections(enterdLocations:[String]) { 
    // array has the address strings 
    var locations = [MKPointAnnotation]() 
    for item in enterdLocations { 
     let geocoder = CLGeocoder() 
     geocoder.geocodeAddressString(item, completionHandler: {(placemarks, error) -> Void in 
      if((error) != nil){ 
       print("Error", error) 
      } 
      if let placemark = placemarks?.first { 

       let coordinates:CLLocationCoordinate2D = placemark.location!.coordinate 

       let dropPin = MKPointAnnotation() 
       dropPin.coordinate = coordinates 
       dropPin.title = item 
       self.myMapView.addAnnotation(dropPin) 
       self.myMapView.selectAnnotation(dropPin, animated: true) 

       locations.append(dropPin) 
       //add this if you want to show them all 
       self.myMapView.showAnnotations(locations, animated: true) 
      } 
     }) 
    } 
} 

我添加了位置var locations数组，它将保存所有注释，以便您可以使用self.myMapView.showAnnotations(locations, animated: true)来显示所有注释...所以r如果不需要，请留意