如何使用CLLocationManager-Swift获取当前经度和纬度 [英] How to get current longitude and latitude using CLLocationManager-Swift

问题描述

我想使用Swift获取位置的当前经度和纬度，并通过标签显示它们。我尝试执行此操作，但标签上没有任何显示。

I want to get the current longitude and latitude of a location using Swift and display them via labels. I tried to do this but nothing displays on the labels.

import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate{

    @IBOutlet weak var longitude: UILabel!
    @IBOutlet weak var latitude: UILabel!
    let locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()
        if (CLLocationManager.locationServicesEnabled()) {
            locationManager.delegate = self
            locationManager.desiredAccuracy = kCLLocationAccuracyBest
            locationManager.requestWhenInUseAuthorization()
            locationManager.startUpdatingLocation()
        } else {
            println("Location services are not enabled");
        }
    }

    // MARK: - CoreLocation Delegate Methods

    func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
         locationManager.stopUpdatingLocation()
         removeLoadingView()
         if (error) != nil {
             print(error)
          }
     }

    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
        var locationArray = locations as NSArray
        var locationObj = locationArray.lastObject as CLLocation
        var coord = locationObj.coordinate
        longitude.text = coord.longitude
        latitude.text = coord.latitude
        longitude.text = "\(coord.longitude)"
        latitude.text = "\(coord.latitude)"
    }
}

推荐答案

恕我直言，当您寻找的解决方案漂亮时，您就使代码复杂化了

IMHO, you are over complicating your code when the solution you are looking is pretty simple.

我已经使用以下代码完成了此操作：

I have done it by using the following code:

首先创建 CLLocationManager 和请求授权

var locManager = CLLocationManager()
locManager.requestWhenInUseAuthorization()

然后检查用户是否允许授权。

then check if the user allowed authorization.

var currentLocation: CLLocation!

if 
   CLLocationManager.authorizationStatus() == .authorizedWhenInUse ||
   CLLocationManager.authorizationStatus() ==  .authorizedAlways
{         
    currentLocation = locManager.location        
}

使用它就可以了

label1.text = "\(currentLocation.coordinate.longitude)"
label2.text = "\(currentLocation.coordinate.latitude)"

您将它们设置为 label.text 的想法是正确的，但是我能想到的唯一原因是用户未给予您许可，这就是为什么您当前的位置数据将为零。

Your idea of setting them to the label.text is correct, however the only reason I can think of is that the user is not giving you permission and that is why your current Location data will be nil.

但是您需要调试并告诉我们。
也不需要 CLLocationManagerDelegate 。

However you would need to debug and tell us that. Also the CLLocationManagerDelegate is not necessary.

希望这会有所帮助。问问是否有疑问。

Hopefully this helps. Ask away if you have doubts.

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