如何显示用户定义的位置

Question

• 我是swift的新手。
• 当用户在文本字段中输入任何位置时，请指导我如何在地图上显示location。

• 使用此文本字段字符串如何在map上显示此位置。 这是我的代码

  import UIKit
  import CoreLocation
  import MapKit
  class DetailViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {
  
  var manager:CLLocationManager!
  var myLocations: [CLLocation] = []
  
  
  required init(coder aDecoder: NSCoder)
  {
      super.init(coder: aDecoder)
  }
  
  override func viewDidLoad() {
      super.viewDidLoad()
  //Setup our Location Manager
      manager = CLLocationManager()
      manager.delegate = self
      manager.desiredAccuracy = kCLLocationAccuracyBest
      manager.requestAlwaysAuthorization()
      manager.startUpdatingLocation()
      //Setup our Map View
      theMap.delegate = self
      theMap.mapType = MKMapType.Satellite
      theMap.showsUserLocation = true
  
  }
  func locationManager(manager:CLLocationManager, didUpdateLocations locations:[AnyObject]) {
      theLabel.text = "\(locations[0])"
      myLocations.append(locations[0] as CLLocation)
  
      let spanX = 0.007
      let spanY = 0.007
      var newRegion = MKCoordinateRegion(center: theMap.userLocation.coordinate, span: MKCoordinateSpanMake(spanX, spanY))
      theMap.setRegion(newRegion, animated: true)
      if (myLocations.count > 1){
          var sourceIndex = myLocations.count - 1
          var destinationIndex = myLocations.count - 2
          let c1 = myLocations[sourceIndex].coordinate
          let c2 = myLocations[destinationIndex].coordinate
          var a = [c1, c2]
          var polyline = MKPolyline(coordinates: &a, count: a.count)
          theMap.addOverlay(polyline)
      }
  }
  

感谢

Answer 1

我假设您的视图控制器是如何设计的。当用户点击＆＃34;查找位置＆＃34;按钮我们将用户输入的文本转换为地址并在地图上放置注释。

@IBOutlet var userinput: UITextField!
@IBAction func findlocation(sender: AnyObject) {
if(userinput.text == "")
 {
 //location cannot be empty.Show an alert to notify user
 }
 else
 {
  var address:String = userinput.text as String // 1 Infinite Loop, CA, USA
 var geocoder = CLGeocoder()
 geocoder.geocodeAddressString(address, {(placemarks: [AnyObject]!, error: NSError!) -> Void in
 if let placemark = placemarks?[0] as? CLPlacemark {
       self.mapView.addAnnotation(MKPlacemark(placemark: placemark))
 }
 })
 }
 }