使用 MapKit 将视图集中到用户位置的按钮

Question

MapKit 中是否有专门的按钮将相机置于用户位置的中心？还是我必须手动创建按钮并切换 mapView.showsUserLocation = true?

Answer 1

您需要获取用户位置坐标并设置区域。

- (IBAction)centerMapOnUserButtonClicked:(id)sender {
MKCoordinateSpan span = MKCoordinateSpanMake(0.0001f, 0.0001f);
    CLLocationCoordinate2D coordinate = self.mapView.userLocation.coordinate;
    MKCoordinateRegion region = {coordinate, span};

    MKCoordinateRegion regionThatFits = [self.mapView regionThatFits:region];
    NSLog(@"Fit Region %f %f", regionThatFits.center.latitude, regionThatFits.center.longitude);

    [self.mapView setRegion:regionThatFits animated:YES];
}

解决方案 2：

MKUserTrackingBarButtonItem *trackButton = [[MKUserTrackingBarButtonItem alloc] initWithMapView:mapView];   
[trackButton setTarget:self];
[trackButton setAction:@selector(track:)];

[toolbar setItems:[NSArray arrayWithObjects:trackButton, nil] animated:YES];

Swift 4:

let trackButton = MKUserTrackingBarButtonItem.init(mapView: mapView)
trackButton.target = self
trackButton.action = #selector(ViewController.track)

toolbar.items?.append(trackButton)

Answer 2

来晚了，啊，不过我刚找到函数：

CLLocationManager.requestLocation()

因此，一旦您正确设置了您的 locationManager（使用 requestAlwaysAuthorization），您就可以在您想要将地图以您自己的位置为中心的任何地方调用它:)

Answer 3

这种方式运行良好（Swift），您可以自定义按钮：

class YourViewController{
   ...
   @IBOutlet weak var mapView:MKMapView
   ...

   override func viewDidLoad() {
      super.viewDidLoad()
      ...
      addMapTrackingButton()
   }

   func addMapTrackingButton(){
      let image = UIImage(named: "trackme") as UIImage?
      let button   = UIButton(type: UIButtonType.System) as UIButton
      button.frame = CGRectMake(5, 5, 35, 35)
      button.setImage(image, forState: .Normal)
      button.backgroundColor = .clearColor()
      button.addTarget(self, action: #selector(YourViewController.centerMapOnUserButtonClicked), forControlEvents:.TouchUpInside)
      self.mapView.addSubview(button)
   }

   func centerMapOnUserButtonClicked() {
      self.mapView.setUserTrackingMode( MKUserTrackingMode.Follow, animated: true)
   }
   ...
}

Swift 4:

func addMapTrackingButton(){
    let image = UIImage(named: "trackme") as UIImage?
    let button   = UIButton(type: UIButtonType.custom) as UIButton
    button.frame = CGRect(origin: CGPoint(x:5, y: 25), size: CGSize(width: 35, height: 35))
    button.setImage(image, for: .normal)
    button.backgroundColor = .clear
    button.addTarget(self, action: #selector(ViewController.centerMapOnUserButtonClicked), for:.touchUpInside)
    mapView.addSubview(button)
}

@objc func centerMapOnUserButtonClicked() {
    mapView.setUserTrackingMode(MKUserTrackingMode.follow, animated: true)
}

使用 MapKit 将视图集中到用户位置的按钮

Button to center view to user location using MapKit

mapkit

ios

swift