将地图限制在特定范围内？

Question

有没有办法设置地图边界并实际限制用户只能在这些边界内平移？

最接近我需要的是 mapView.fitBounds 方法，但它似乎根本没有限制平移。我做错了什么或者这个方法没有做我需要的吗？

我正在使用 SKMaps iOS SDK 版本 2.5

谢谢！

Answer 1

虽然没有对此的直接支持，但您可以通过解决方法实现相同的 "effect"：

Answer 2

这是我编写的一些代码 (based on this answer) 以将用户绑定在由左上角坐标和右下角坐标定义的边界框内。

在我的 viewDidLoad 中像这样启动 mapView 对象后

mapView = [[SKMapView alloc] initWithFrame:CGRectMake( 0.0f, 0.0f,  CGRectGetWidth(self.view.frame), CGRectGetHeight(self.view.frame) )];

//Setting the zoom limit, (totally optional)
SKMapZoomLimits zoomLimits;
zoomLimits.mapZoomLimitMin = 15.153500;
zoomLimits.mapZoomLimitMax = 21;
mapView.settings.zoomLimits = zoomLimits;

//Creating our bounding box by specifying a top left point, and a bottom right
CLLocationCoordinate2D topLeftBoundary;
topLeftBoundary.longitude = 21.174489;
topLeftBoundary.latitude = 39.777993;

CLLocationCoordinate2D botRightBoundary;
botRightBoundary.longitude = 21.191678;
botRightBoundary.latitude = 39.765834;

_boundaries = [SKBoundingBox boundingBoxWithTopLeftCoordinate:topLeftBoundary bottomRightCoordinate:botRightBoundary];
}

然后我定义isInBoundingBox方法。

-(BOOL) isInBoundingBox: (SKCoordinateRegion)regionBox {
    if (_boundaries.topLeftCoordinate.latitude < regionBox.center.latitude || _boundaries.bottomRightCoordinate.latitude > regionBox.center.latitude ||
    _boundaries.topLeftCoordinate.longitude > regionBox.center.longitude || _boundaries.bottomRightCoordinate.longitude < regionBox.center.longitude)
    {
        return false;    
    }
return true;
}

然后在我们的 didChangeToRegion 方法中，我们这样做：

- (void)mapView:(SKMapView*)curMapView didChangeToRegion:(SKCoordinateRegion)region{
    //NSLog(@" @@@@@@@@ did change to ZOOM LEVEL: %f and lat: %f, long: %f",region.zoomLevel, region.center.latitude, region.center.longitude);

    BOOL inBoundingBox = [self isInBoundingBox:region];
    if (inBoundingBox) {
        // if mapRegion is valid save it
        _lastValidRegion = region;
    } else {
        // if mapRegion is invalid reposition the map inside the bounding box
        [mapView setVisibleRegion:_lastValidRegion];
    }
}

将地图限制在特定范围内？

Limit a map to certain bounds?

ios

skmaps