Question

我想在两个坐标之间显示一个地图。我已经使用此代码显示包含两个坐标的地图的矩形。但是我的坐标都没有显示，而是显示了除坐标之外的两个坐标之间的区域。我该怎么做才能包括我的两个坐标？

    let coordinate1 = CLLocationCoordinate2DMake(28.53, 77.39)
    let coordinate2 = CLLocationCoordinate2DMake(29.13,76.69)
    // convert them to MKMapPoint
    let p1 = MKMapPointForCoordinate (coordinate2);
    let p2 = MKMapPointForCoordinate (coordinate1);

    let mapRect = MKMapRectMake(fmin(p1.x,p2.x), fmin(p1.y,p2.y), fabs(p1.x-p2.x), fabs(p1.y-p2.y));
    mapView.setVisibleMapRect(mapRect, animated: true)

Answer 1

你可以尝试下面的功能，它使传递的点在地图中心：

func centerLocationInMapView(centerPoint: CLLocationCoordinate2D) {
    floatForRadiusInMiles = 10.0 // you can ignore this i have taken this for my custom radius property
    var scalingFactor: Double = abs((cos(2 * M_PI * centerPoint.latitude / 360.0)))
    var coordinateSpan: MKCoordinateSpan = MKCoordinateSpanMake(floatForRadiusInMiles / 69.0, floatForRadiusInMiles / (scalingFactor * 69.0))
    var coordinateRegion: MKCoordinateRegion = MKCoordinateRegionMake(centerPoint, coordinateSpan)
    self.mapViewForHomeScreen.scrollEnabled = true
    mapViewForHomeScreen.setRegion(coordinateRegion, animated: TRUE)
    mapViewForHomeScreen.regionThatFits(coordinateRegion)
}

调用此函数

self.centerLocationInMapView( (first latitude + second latitude)/2 , (first longitude + second longitude)/2 )

传递两个lat之间的中心点，长，以便中心将是地图中心！

Answer 2

基本上是由于自动布局。我们应该使用mapViewDidFinishLoadingMap(mapView: MKMapView)方法来设置它。

func mapViewDidFinishLoadingMap(mapView: MKMapView) {
    // this is where visible maprect should be set
    let coordinate1 = CLLocationCoordinate2DMake(28.53, 77.39)
    let coordinate2 = CLLocationCoordinate2DMake(29.13,76.69)
    // convert them to MKMapPoint
    let p1 = MKMapPointForCoordinate (coordinate2);
    let p2 = MKMapPointForCoordinate (coordinate1);

    let mapRect = MKMapRectMake(fmin(p1.x,p2.x), fmin(p1.y,p2.y), fabs(p1.x-p2.x), fabs(p1.y-p2.y));
    mapView.setVisibleMapRect(mapRect, animated: true)
}

如何在两个坐标内显示地图？

2 个答案: