地图按钮刷新位置 [英] Map button refresh location

问题描述

我正在为iPad的第一个快速申请工作。到目前为止，我有一个基本的地图视图，在底部工具栏中有一个按钮，我想刷新并点击用户位置一次点击。

目前我有这个代码：

  import UIKit 
 import MapKit 
 import CoreLocation 
 
 class ViewController： UIViewController，MKMapViewDelegate，CLLocationManagerDelegate {
 
 var location：CLLocation！ 
 let LocationManager = CLLocationManager（）
 
 @IBOutlet weak var mapView：MKMapView！ 
 @IBOutlet weak var refresh：UIBarButtonItem！ 
 
 @IBAction func refresh（sender：AnyObject）{
 
 let center = CLLocationCoordinate2D（纬度：location.coordinate.latitude，longitude：location.coordinate.longitude）
 
 let region = MKCoordinateRegion（center：center，span：MKCoordinateSpan（latitudeDelta：0.01，longitudeDelta：0.01））
 
 self.mapView.setRegion（region，animated：true）
} 
 
覆盖func viewDidLoad（）{
 super.viewDidLoad（）
 
 self.locationManager.delegate = self 
 
 self。 locationManager.desiredAccuracy = kCLLocationAccuracyBest 
 
 self.locationManager.requestWhenInUseAuthorization（）
 
 self.locationManager.startUpdatingLocation（）
 
 self.mapView.showsUserLocation = true 
 
} 
 
覆盖func didReceiveMemoryWarning（）{
 super.didReceiveMemoryWarning（）
 //处理可以重新创建的任何资源。 
} 
 
 //位置委托方法
 
 func locationManager（manager：CLLocationManager，didUpdateLocations locations：[CLLocation]）{
 
 let location = locations.last 
 
 let center = CLLocationCoordinate2D（纬度：location！.coordinate.latitude，longitude：location！.coordinate.longitude）
 
 let region = MKCoordinateRegion（center ：center，span：MKCoordinateSpan（latitudeDelta：1，longitudeDelta：1））
 
 self.mapView.setRegion（region，animated：true）
 
 self.locationManager.stopUpdatingLocation ）
 
} 
 
 func locationManager（manager：CLLocationManager，didFailWithError error：NSError）
 {
 print（错误代码：+ error.localizedDescription ）
} 
  

}

< >如何获得刷新按钮来做到这一点？我真的需要一些帮助，因为我是新的Swift / xcode：）

谢谢

解决方案

由于@Orkhan说你可以这样做。

如果你想做这个动作，你只需简单的Ctrl Ctrl拖动到viewController选择动作。

之后，您可以添加代码到处理程序。

  var location：CLLocation！ 
 @IBAction func refreshLocation（sender：AnyObject）{
 
 let center = CLLocationCoordinate2D（纬度：location.coordinate.latitude，longitude：location.coordinate.longitude）
 let region = MKCoordinateRegion（center：center，span：MKCoordinateSpan（latitudeDelta：0.01，longitudeDelta：0.01））
 
 self.map.setRegion（region，animated：true）
} 
 
 func locationManager（manager：CLLocationManager !, didUpdateLocations locations：[AnyObject]！）{
 self.location = locations.last as CLLocation 
} 
  

I am working on my first swift application for the iPad. Thus far I have a basic mapview with a button in the bottom toolbar, which I would like to refresh and focus onto the users location once clicked.

Currently I have this code:

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {

var location: CLLocation!
let locationManager = CLLocationManager()

@IBOutlet weak var mapView: MKMapView!
@IBOutlet weak var refresh: UIBarButtonItem!

@IBAction func refresh(sender: AnyObject) {

    let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)

    let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))

    self.mapView.setRegion(region, animated: true)
}

override func viewDidLoad() {
    super.viewDidLoad()

    self.locationManager.delegate = self

    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest

    self.locationManager.requestWhenInUseAuthorization()

    self.locationManager.startUpdatingLocation()

    self.mapView.showsUserLocation = true

}

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

// location delegate methods

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: 1, longitudeDelta: 1))

    self.mapView.setRegion(region, animated: true)

    self.locationManager.stopUpdatingLocation()

}

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

}

How can I get the refresh button to do this? I really need some help as I am new to Swift / xcode :)

Thank you

解决方案

As @Orkhan said you can do it in this way.

If you want to do the action you just simple ctrl-drag to viewController and select "Action".

After that you can add code to the handler.

    var location: CLLocation!
    @IBAction func refreshLocation(sender: AnyObject) {

    let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
    let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))

    self.map.setRegion(region, animated: true)
}

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
    self.location = locations.last as CLLocation
}

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