坐标返回nil，我已经在plist文件中输入了requestAlwaysAuthorization和requestWhenInUseAuthorization，但是什么也没有发生。
这是我的密码。
这段代码是怎么回事？我找不到错误在哪里。只不过是把0换成了cordinates
import UIKit
import CoreLocation
class ViewController: UIViewController,CLLocationManagerDelegate {
//Location
var seenError : Bool = false
var locationFixAchieved : Bool = false
var locationStatus : NSString = "Not Started"
var locationManager: CLLocationManager!
var userLocation : String!
var userLatitude : Double!
var userLongitude : Double!
//Current weather Outlets "Display Objects"
@IBOutlet weak var userLocationLabel: UILabel!
@IBOutlet weak var visibilityLabel: UILabel!
@IBOutlet weak var temperatureLabel: UILabel!
@IBOutlet weak var iconView: UIImageView!
@IBOutlet weak var currentTimeLabel: UILabel!
@IBOutlet weak var humidityLabel: UILabel!
@IBOutlet weak var precipitationLabel: UILabel!
@IBOutlet weak var summaryLabel: UILabel!
@IBOutlet weak var windSpeedLabel: UILabel!
@IBOutlet weak var refreshButton: UIButton!
@IBOutlet weak var refreshActivityIndicator: UIActivityIndicatorView!
//API KEY
private let apiKey = "09ca8e3e75fafbadaf4b8594dabe860e"
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
refreshActivityIndicator.hidden = true
getCurrentWeatherData()
}
//Location Code
func initLocationManager() {
seenError = false
locationFixAchieved = false
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation() }
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
locationManager.stopUpdatingLocation()
if ((error) != nil) {
if (seenError == false) {
seenError = true
print(error)
}
}
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
CLGeocoder().reverseGeocodeLocation(manager.location, completionHandler: {(placemarks, error)->Void in
let pm = placemarks[0] as! CLPlacemark
self.displayLocationInfo(pm)
})
if (locationFixAchieved == false) {
locationFixAchieved = true
var locationArray = locations as NSArray
var locationObj = locationArray.lastObject as! CLLocation
var coord = locationObj.coordinate
self.userLatitude = coord.latitude
self.userLongitude = coord.longitude
getCurrentWeatherData()
}
}
func displayLocationInfo(placemark: CLPlacemark?) {
if let containsPlacemark = placemark {
//stop updating location to save battery life
locationManager.stopUpdatingLocation()
let locality = (containsPlacemark.locality != nil) ? containsPlacemark.locality : ""
let postalCode = (containsPlacemark.postalCode != nil) ? containsPlacemark.postalCode : ""
let administrativeArea = (containsPlacemark.administrativeArea != nil) ? containsPlacemark.administrativeArea : ""
let country = (containsPlacemark.country != nil) ? containsPlacemark.country : ""
//println(locality)
//println(postalCode)
//println(administrativeArea)
//println(country)
self.userLocationLabel.text = "\(locality), \(administrativeArea)"
}
}
func locationManager(manager: CLLocationManager!,
didChangeAuthorizationStatus status: CLAuthorizationStatus) {
var shouldIAllow = false
switch status {
case CLAuthorizationStatus.Restricted:
locationStatus = "Restricted Access to location"
case CLAuthorizationStatus.Denied:
locationStatus = "User denied access to location"
case CLAuthorizationStatus.NotDetermined:
locationStatus = "Status not determined"
default:
locationStatus = "Allowed to location Access"
shouldIAllow = true
}
NSNotificationCenter.defaultCenter().postNotificationName("LabelHasbeenUpdated", object: nil)
if (shouldIAllow == true) {
NSLog("Location to Allowed")
// Start location services
locationManager.startUpdatingLocation()
} else {
NSLog("Denied access: \(locationStatus)")
}
}
func getCurrentWeatherData() -> Void {
userLocation = "\(userLatitude),\(userLongitude)"
// DC cord. = "44.029002,-92.855343"
//URL
let baseURL = NSURL(string: "https://api.forecast.io/forecast/\(apiKey)/")
let forecastURL = NSURL(string:"\(userLocation)", relativeToURL: baseURL)
// creates data object; to get and save data from online
let sharedSession = NSURLSession.sharedSession()
let downloadTask: NSURLSessionDownloadTask = sharedSession.downloadTaskWithURL(forecastURL!, completionHandler: { (location:NSURL!, response:NSURLResponse!, error: NSError!) -> Void in
// if everything goes alright (no errors then run code)
if (error == nil) {
//turn JSON dictionary to NSDictionary so it's easier to work with
let dataObject = NSData(contentsOfURL: location)
let weatherDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataObject!, options: nil, error: nil) as! NSDictionary
//bring weather dictionary from the CurrentWeather file
let currentWeather = Current(weatherDictionary: weatherDictionary)
println(weatherDictionary)
//update view with current weather information
dispatch_sync(dispatch_get_main_queue(), { () -> Void in
self.temperatureLabel.text = "\(currentWeather.temperature)"
self.iconView.image = currentWeather.icon!
self.currentTimeLabel.text = "\(currentWeather.currentTime!)"
self.humidityLabel.text = "\(currentWeather.humidity * 100)%"
self.precipitationLabel.text = "\(currentWeather.precipProbability * 100)%"
self.summaryLabel.text = "\(currentWeather.summary)"
self.windSpeedLabel.text = "\(currentWeather.windSpeed) MPH"
self.visibilityLabel.text = "\(currentWeather.visibility) Mi"
//stop refresh animation
self.refreshActivityIndicator.stopAnimating()
self.refreshActivityIndicator.hidden = true
self.refreshButton.hidden = false
})
}
else {
let networkIssueController = UIAlertController(title: "Error", message: "Network Connectivity Error! Can't load data", preferredStyle: .Alert)
println(error)
//information for ok button in alertView
let okButton = UIAlertAction(title: "OK", style: .Default, handler: nil)
networkIssueController.addAction(okButton)
//information for cancel button in alertView
let cancelButton = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
networkIssueController.addAction(cancelButton)
//if an error occurs show alert
self.presentViewController(networkIssueController, animated: true, completion: nil)
dispatch_async(dispatch_get_main_queue(), { () -> Void in
//Stop refresh animation
self.refreshActivityIndicator.stopAnimating()
self.refreshActivityIndicator.hidden = true
self.refreshButton.hidden = false
})
}
})
downloadTask.resume()
}
//refresh method
@IBAction func refresh() {
getCurrentWeatherData()
refreshButton.hidden = true
refreshActivityIndicator.hidden = false
refreshActivityIndicator.startAnimating()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
最佳答案
也许您已经在未显示的代码中处理了所有这些情况，但以下是我认为您的代码中缺少的一些内容：
我不认为你在代码中调用了initLocationManager。getCurrentWeatherData()在您的viewDidLoad()中不起作用，您需要从locationManager(didUpdateLocations)调用它。
仅将requestAlwaysAuthorization或requestWhenInUseAuthorization添加到应用程序选项是不够的。您还需要为NSLocationAlwaysUsageDescription提供文本来解释为什么需要访问。
您需要检查授权状态。如果不确定，则需要请求访问并实现回调以等待用户响应。如果您以非待定状态调用requestAuthorization，我相信该函数不会执行任何操作，也不会提供任何反馈。
对于进一步的故障排除，我建议您（1）获取授权的状态，并（2）在locationManager(didUpdateLocations)中放置print语句或断点，以查看它是否被调用。
关于ios - 位置坐标 swift 返回nil，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/29724900/