Question

我创建了一个mapkit应用程序，在此显示我的位置并每次更新此位置并将此位置设置在视图中心。我更新了我的位置并使用布尔变量设置在中心。我想在我的地图上检测滚动或缩放触摸手指，当我这样做时，我的布尔变量发生了变化，并且没有将我的位置设置在中心但我不知道在mapkit上处理触摸事件。

请指导我并告诉我如何在触摸和滚动地图时更改我的变量。谢谢。这是我的代码：

@implementation ViewController
{
    CLLocationManager *locationManager;
    double latitudes;
    double longitudes;
    BOOL updateLocation;
}
@synthesize mapView;
- (void)viewDidLoad
{
    [super viewDidLoad];
    locationManager = [[CLLocationManager alloc] init];
    updateLocation = YES;
    mapView = [[MKMapView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    mapView.mapType = MKMapTypeStandard;
    mapView.zoomEnabled = YES;
    mapView.scrollEnabled = YES;
    mapView.showsUserLocation = YES;
    [mapView.userLocation setTitle:@"I'm Here"];
    [self.view addSubview:mapView];
    mapView.delegate = self;

    [self GetMyLocation];


}
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
            NSLog(@"didFailWithError: %@", error);
            UIAlertView *errorAlert = [[UIAlertView alloc]
                                       initWithTitle:@"Error" message:@"Failed to Get Your Location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [errorAlert show];
        }
        - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
            CLLocation *currentLocation = newLocation;

            if (currentLocation != nil) {
                longitudes = currentLocation.coordinate.longitude;
                latitudes = currentLocation.coordinate.latitude;
                //NSLog(@"%f,%f",longitudes,latitudes);
                //[self centerLocation];
            }
        }



#pragma mark - MKMapViewDelegate
            - (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{
                if (updateLocation) {
                    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 800, 800);
                    [self.mapView setRegion:[self.mapView regionThatFits:region] animated:NO];
                }
                else{NSLog(@"Don't Update");}
            }

Answer 1

只需使用下面的MKMapView委托方法

– mapView:regionWillChangeAnimated:
– mapView:regionDidChangeAnimated:

Answer 2

使用：

mapView:regionWillChangeAnimated:

告诉代表地图视图显示的区域即将更改。

只要当前显示的地图区域，就会调用此方法变化。在滚动期间，可以多次调用此方法报告地图位置的更新。因此，您的实施这种方法应尽量轻巧，以免影响滚动表现。

基于MKMapViewDelegate Protocol Reference

Answer 3

在 Swift 中，您应该使用以下代码

extension UIViewController: MKMapViewDelegate {
     func mapView(_ mapView: MKMapView, regionDidChangeAnimated animated: Bool) {}
}

如何通过触摸检测mapkit的滚动或缩放

3 个答案: