iOS - 根据Google Maps Directions API响应构建折线

How can I get a polyline out of the Directions API JSON response?

如何从Directions API JSON响应中获取折线?

Using the overview_polyline is not an option as it is only a smoothened version of the actual polyline.

使用overview_polyline不是一个选项,因为它只是实际折线的平滑版本。

I also tried getting the start and end location coordinates from the steps, however those will only give me a very inaccurate polyline, because they only contain a few coordiantes.

我也尝试从步骤中获取开始和结束位置坐标,但是这些只会给我一个非常不准确的折线,因为它们只包含一些坐标。

How can I get an accurate polyline out of the Directions response?

如何从Directions响应中获得准确的折线?

EDIT: Using @SaxonDruce answer, I can get accurate polylines however, they look like this:

编辑:使用@SaxonDruce答案,我可以获得准确的折线,但它们看起来像这样:

2 个解决方案

#1

Based on the sample response, you'll need something equivalent to:

根据样本响应,您需要的东西相当于:

response.routes[0].legs[0].steps[i].polyline.points

So, get the first route, then the first leg, then loop over the steps, then get the polyline, then get the points.

因此,获取第一条路线,然后是第一条路线,然后循环步骤,然后获取折线,然后获得积分。

#2

To add to saxon druce's answer, You can loop over all the steps of first leg and combine all the points to form a polyline.

要添加到saxon druce的答案,您可以循环第一条腿的所有步骤并将所有点组合以形成折线。

List<LatLng> points = new ArrayList<>();
for (DirectionsStep step : legs[i].steps) {
    points.addAll(step.polyline.decodePath());
}
EncodedPolyline legPolyline = new EncodedPolyline(points);

#1