繁体   English   中英

如何在MKMapView中居我当前的位置?

[英]How to center my current location in MKMapView?

我通过使用showUserLocation启用在MKMapView显示current location 我还想将mapview集中到用户当前位置以及缩放的位置图。 请帮我解决这个问题,因为我在stackoverflow上没有得到任何其他类似问题的帮助。

我的代码如下:

- (void)viewDidLoad {
  [super viewDidLoad];
  [mapView setMapType:MKMapTypeStandard];
  [mapView setZoomEnabled:YES];
  [mapView setScrollEnabled:YES];
  [mapView setCenterCoordinate:mapView.userLocation.location.coordinate animated:YES];
  [mapView setDelegate:self];
}

要以用户位置为中心,您可以使用以下代码:

[mapView setCenterCoordinate:mapView.userLocation.location.coordinate animated:YES];

要放大特殊位置,您应该研究区域( MKCoordinateRegion )的计数和工作方式,计算区域的值并使用调用显示它:

[mapView setRegion:myRegion animated:YES];

示例WorldCities显示了区域显示的基础知识。

MKCoordinateRegion region;
    MKCoordinateSpan span;
    span.latitudeDelta = 0.2;     // 0.0 is min value u van provide for zooming
    span.longitudeDelta= 0.2;

    CLLocationCoordinate2D location = [self addressLocation];
    region.span=span;
    region.center =location;     // to locate to the center
    if(addAnnotation != nil) {
        [mapView removeAnnotation:addAnnotation];
        [addAnnotation release];
        addAnnotation = nil;
    }
    addAnnotation = [[AddressANnotation alloc] initWithCoordinate:location];
    [mapView addAnnotation:addAnnotation];
    [mapView setRegion:region animated:TRUE];
    [mapView regionThatFits:region];

这有助于我在地图视图的中心显示位置。

对于MKMapView

self.mapView.showsUserLocation = YES;
self.mapView.userTrackingMode = MKUserTrackingModeFollow;
-(void) removeZoom:(float)deltaValue
{
    MKCoordinateRegion region;
    region.center.latitude =  self.locationManager.location.coordinate.latitude;
    region.center.longitude = self.locationManager.location.coordinate.longitude;

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    region.span.latitudeDelta = deltaValue;
    region.span.longitudeDelta = deltaValue;
    region = [mapViewSelf regionThatFits:region];
    [mapViewSelf setRegion:region animated:YES];
    [UIView commitAnimations];

}

暂无
暂无

声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM