打印坐标信息给用户，Swift

问题描述：

我正在处理一个地图应用程序，到目前为止我有能力丢弃引脚（引脚称为存储器）。我希望在新场景中显示每个丢弃引脚的引脚坐标信息，以便用户可以看到其引脚丢弃的概览。我会如何去做这件事？打印坐标信息给用户，Swift

我已经设置了主视图控制器并添加了一个模态显示的新场景。到目前为止，我有以下代码管理位置和滴/存储针数据：

@IBOutlet weak var addButton: UIBarButtonItem! 
// Add button action 
@IBAction func addButton(sender: AnyObject) { 
    let annotation = MKPointAnnotation() 
    annotation.coordinate = CLLocationCoordinate2D(latitude: self.placesMap.userLocation.coordinate.latitude, longitude: self.placesMap.userLocation.coordinate.longitude) 
    self.placesMap.addAnnotation(annotation) 
    self.locationManager.startUpdatingLocation() 
} 

// Location function 
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { 
    let location = locations.last 
    let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude) 
    let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.004, longitudeDelta: 0.004)) 
    self.placesMap?.setRegion(region, animated: true) 
    self.locationManager.stopUpdatingLocation() 
    let locationDictionary:[String:Double] = ["latitude":center.latitude,"longitude":center.longitude] 
    var locationArray = [[String:Double]]() 
    if NSUserDefaults.standardUserDefaults().objectForKey("locationArray") != nil { 
     locationArray = NSUserDefaults.standardUserDefaults().objectForKey("locationArray") as! [[String:Double]] 
    } 
    locationArray.append(locationDictionary) 
    NSUserDefaults.standardUserDefaults().setObject(locationArray, forKey: "locationArray") 
    NSUserDefaults.standardUserDefaults().synchronize() 
} 

func locationManager(manager: CLLocationManager, didFailWithError error: NSError) 
{ 
    print("Error code: " + error.localizedDescription) 
}

答

取决于将在其中进行SEGUE，您可以在locationArray传递给performSegueWithIdentifier发件人的说法，或使其的属性你查看控制器。无论采用哪种方式，您都可以通过UIViewController的prepareForSegue方法将已丢弃引脚数组注入新场景。

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
    super.prepareForSegue(segue, sender: sender) 
    guard let identifier = segue.identifier else { return } 
    switch identifier { 
    case "newScene": 
     let controller = segue.destinationViewController as! NewSceneViewController 
     controller.arrayOfDroppedPins = locationArray 
     // or, controller.arrayOfDroppedPins = sender as! [[String:Double]] 
     // if you pass in locationArray as the sender 
    default: 
     break 
    } 
}

然后在新的场景视图控制器中定义一个属性arrayOfDroppedPins。

打印坐标信息给用户，Swift

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