让一个非常简单的 Swift CoreLocation 示例工作

Question

我尝试过使用 Swift 遵循简单的 CoreLocation 示例，但我无法让事情正常进行。我已经提取了大部分代码，所以它只是为了集中问题而进行的准系统，我希望答案很快就会跳出来给某人。

import UIKit

import CoreLocation


class ViewController: UIViewController,CLLocationManagerDelegate {
@IBOutlet weak var txtLatitude: UITextField!
@IBOutlet weak var txtLongitude: UITextField!

@IBOutlet weak var cmdLocateMe: UIButton!
@IBOutlet weak var slider: UISlider!
@IBOutlet weak var txtSlider: UITextField!
@IBOutlet weak var power: UISwitch!
var locationManager: CLLocationManager!


override func viewDidLoad() {
    locationManager = CLLocationManager();
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.startUpdatingLocation();
    super.viewDidLoad()


    // Do any additional setup after loading the view, typically from a nib.
}

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


@IBAction func valueChanged(sender: UISlider) {
    if power.on{
    var val = "\(slider.value)";
    txtSlider.text = val;
    }
}


@IBAction func cmdLocateMeClicked(sender: UIButton) {


}

//Deprecated
@IBAction func cmdLocateMePressed(sender: AnyObject) {
}

//CLLocationManagerDelegate
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
    var location:CLLocation = locations[locations.count-1] as CLLocation

    println("locations = \(locations)")
    txtLatitude.text = "\(location.coordinate.latitude)";
    txtLongitude.text = "\(location.coordinate.longitude)";
}

func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
    println(error)
    txtLatitude.text = "Can't get your location!"
}

}

Answer 1

想通了——我必须授予我的应用程序在 iOS 模拟器上接收位置信息的权限（设置 -> 隐私 -> 位置）。一旦我这样做了，一切就完美了。