ios - 如何显示用户定义的位置

我对斯威夫特不熟悉。
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。
通过使用此文本字段字符串，如何在map上显示此位置。
这是我的密码

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)
    }
}

谢谢

最佳答案

我假设你的视图控制器就是这样设计的。当用户点击“查找位置”按钮时，我们将把用户输入的文本转换成地址，并在地图上添加注释。

@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))
 }
 })
 }
 }