Question

我在HomeViewController上获取位置然后我想将它传递给其他NextViewController，但它总是不返回任何内容。

HomeViewController - 声明

struct MyVariables {

static var  fetchedLat = String()
static var fetchedLong = String()
}

class HomeViewController: UIViewController,UITableViewDataSource,UITableViewDelegate, CLLocationManagerDelegate, NSFetchedResultsControllerDelegate {

var location: CLLocation!{
    didSet{
        lat = "\(location.coordinate.latitude)"
        long = "\(location.coordinate.longitude)"
    }
}

 func locationManager(manager: CLLocationManager, didUpdateLocations  locations: [CLLocation])
{
    let locValue:CLLocationCoordinate2D = manager.location!.coordinate
    MyVariables.fetchedLat = String("\(locValue.latitude)")
    MyVariables.fetchedLong = String("\(locValue.longitude)")
    print("locations = \(locValue.latitude) \(locValue.longitude)")
    location = (locations ).last
    locationManager.stopUpdatingLocation()
}


override func viewDidLoad() {
    super.viewDidLoad()

    self.locationManager.requestAlwaysAuthorization()

    self.locationManager.requestWhenInUseAuthorization()

    if CLLocationManager.locationServicesEnabled()
    {
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
        locationManager.startUpdatingLocation()
    }
}

NextViewController - ViewDidLoad

    MyVariables.fetchedLat = outputLat
    MyVariables.fetchedLong = outputLong

如果有更好的方法，请告诉我，以便我可以访问Lat＆amp;在我的应用程序中的所有其他ViewController中很长。

Answer 1

定义var传递的数据：CLLocationManger？全局在HomeViewController类

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        //let cell = tableView.cellForRowAtIndexPath(indexPath)
        index = indexPath.row

        performSegueWithIdentifier("yourSegue", sender: self)

    }
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)       
 {
        if segue.identifier == "yourSegue"
        {
        let destVC = segue.destinationViewController as! NextViewController 
        destVC.locationData = passedData // both are of Type CLLocationManager
        }

    }

在NextViewController中，在类中全局声明： -

var locationData:CLLocationManager?

然后在NextViewController中访问

 locationData.location.coordinate.latitude

 locationData.location.coordinate.longitude

注意： - 不要传递纬度和经度，而是传递CLLocationManager本身，因为您可以访问CLLocationManager的所有属性，即纬度，经度，坐标等

将位置传递给其他视图控制器

1 个答案: