Google Maps for iOS，swift - 如何在标记之间显示整个折线？ [英] Google Maps for iOS, swift - How to show entire polyline between markers?

问题描述

我正尝试在Google地图视图中放置折线。多段线是通过Google地图方向api中的overview_polyline获取的。

I am trying to fit a polyline in the google map view. The polyline was acquired through overview_polyline in the google maps directions api.

想知道如何将编码的折线转换成可以使用的东西。我需要在地图视图中适合多段线。所有我发现要做的是适合界限显示所有标记，但不显示整个多段线。

Wondering how I would be able to convert an encoded polyline into something that can be worked with. I need to fit the polyline in the map view. All i have found out to do is fit the bounds to show all markers but not showcase the entire polyline.

func fitAllMarkers()
{

    var bounds = GMSCoordinateBounds()

    for marker in markers
    {
        bounds = bounds.includingCoordinate(marker.position)
    }

    googleMapView.animateWithCameraUpdate(GMSCameraUpdate.fitBounds(bounds))

}

推荐答案

对于Swift 2.0 Google Maps，使地图视图适合您正在绘制的路线的折线：

For Swift 2.0 Google Maps, to make your map view fit the polyline of the route you are drawing:

let path: GMSPath = GMSPath(fromEncodedPath: route)!
    routePolyline = GMSPolyline(path: path)
    routePolyline.map = mapView


    var bounds = GMSCoordinateBounds()

    for index in 1...path.count() {
        bounds = bounds.includingCoordinate(path.coordinateAtIndex(index))
    }

    mapView.animateWithCameraUpdate(GMSCameraUpdate.fitBounds(bounds))

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