SWIFT中获取当前经伟度

import UIKit
import CoreLocation  //添加引用

class ViewController: UIViewController,CLLocationManagerDelegate {

    let locationManager:CLLocationManager = CLLocationManager() //实例化一个CLLocationManager对象

    override func viewDidLoad() {
        super.viewDidLoad()

        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest //设置为最高的精度
        if(ios8()){
            locationManager.requestAlwaysAuthorization()  //如果是IOS8及以上版本需调用这个方法
        }
        
        locationManager.startUpdatingLocation()  //start updating location
    }
    
    func ios8() -> Bool {
        var versionCode:String = UIDevice.currentDevice().systemVersion
        let start:String.Index = advance(versionCode.startIndex, 0)
        let end:String.Index = advance(versionCode.startIndex, 1)
        let range = Range<String.Index>(start: start, end: end)
        let version = NSString(string: UIDevice.currentDevice().systemVersion.substringWithRange(range)).doubleValue
        return version >= 8.0
    }
    //重写这个方法获取位置
    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!){
        let location:CLLocation = locations[locations.count - 1] as! CLLocation //得到数组中的最后一个元素
        if location.horizontalAccuracy > 0 {
            let latitude = location.coordinate.latitude  //得到经伟度
            let longtitude = location.coordinate.longitude

            locationManager.stopUpdatingLocation() //stop updating location
        }
        
    }
    //重写当发生错误时要调用的方法
    func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!){
        println(error)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}