Swift - 经纬度位置坐标与真实地理位置相互转化

通过CoreLocation类，得到的定位信息都是以经度和纬度等表示的地理信息，通过CLGeocoder类可以将其反编码成一个地址。反之，也可根据一个地址获取经纬度。

1，通过经纬度获取地址

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import UIKit import CoreLocation import MapKit   class ViewController: UIViewController ,CLLocationManagerDelegate {       @IBOutlet weak var textView: UITextView!           override func viewDidLoad() {         super.viewDidLoad()           reverseGeocode()     }           //地理信息反编码     func reverseGeocode(){         var geocoder = CLGeocoder()         var p:CLPlacemark?         var currentLocation = CLLocation(latitude: 32.029171, longitude: 118.788231)         geocoder.reverseGeocodeLocation(currentLocation, completionHandler: {             (placemarks:[AnyObject]!, error:NSError!) -> Void in             //强制转成简体中文             var array = NSArray(object: "zh-hans")             NSUserDefaults.standardUserDefaults().setObject(array, forKey: "AppleLanguages")             //显示所有信息             if error != nil {                 //println("错误：\(error.localizedDescription))")                 self.textView.text = "错误：\(error.localizedDescription))"                 return             }             let pm = placemarks as! [CLPlacemark]             if pm.count > 0{                 p = placemarks[0] as? CLPlacemark                 //println(p) //输出反编码信息                 self.textView.text = p?.name             } else {                 println("No placemarks!")             }         })     }       override func didReceiveMemoryWarning() {         super.didReceiveMemoryWarning()     } }

2，通过地址获取经纬度

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import UIKit import CoreLocation import MapKit   class ViewController: UIViewController ,CLLocationManagerDelegate {       @IBOutlet weak var textView: UITextView!           override func viewDidLoad() {         super.viewDidLoad()           locationEncode()     }                 //地理信息编码     func locationEncode(){         var geocoder = CLGeocoder()         var p:CLPlacemark!         geocoder.geocodeAddressString("南京市新街口大洋百货", completionHandler: {             (placemarks:[AnyObject]!, error:NSError!) -> Void in                           if error != nil {                 self.textView.text = "错误：\(error.localizedDescription))"                 return             }             let pm = placemarks as! [CLPlacemark]             if pm.count > 0{                 p = placemarks[0] as! CLPlacemark                 self.textView.text = "经度：\(p.location.coordinate.longitude)   "                     + "纬度：\(p.location.coordinate.latitude)"             } else {                 println("No placemarks!")             }         })     }       override func didReceiveMemoryWarning() {         super.didReceiveMemoryWarning()     } }