如何返回所选多边形的坐标？

I saw that you reduced your data.coordinates json into auxCoords. What you can do is to push it into an array, then use this array to map those paths from auxCoords to a <Polygon/>. Here's how I achieved this:

1. Pushing the reduced json data in an array

import data from "./data.json";
const dataArray = [];

let auxCoords = {
  auxCoords: data.coordinates.reduce(
    (a, [c]) => a.concat([c.map(([lat, lng]) => ({ lat, lng }))]),
    []
  )
};
dataArray.push(auxCoords.auxCoords[0]);

2. Inside the <Map/>, you will see that I enclosed the <Polygon/> in the {auxCoords.auxCoords.map((poly, key) => ()}. This is mapping each polygon path arrays from the auxCoords. In this case, it individually creates a <Polygon/> object which you can access the path and properties of each shape. Also, notice the onClick, onMouseover and onMouseout parameters inside the <Polygon/>. Luckily, these events are supported by [google-maps-react`](https://www.npmjs.com/package/google-maps-react#events-2).

 return (
      <div>
        <Map
          className="map"
          google={this.props.google}
          onClick={this.onMapClicked}
          initialCenter={{
            lat: -47.7027099655629,
            lng: -22.26485424139211
          }}
          style={{ height: "100%", position: "relative", width: "100%" }}
          zoom={14}
        >
          {auxCoords.auxCoords.map((poly, key) => (
            <Polygon
              key={key}
              paths={poly}
              strokeColor="#0000FF"
              strokeOpacity={0.8}
              strokeWeight={2}
              fillColor="#0000FF"
              fillOpacity={0.35}
              onClick={this.onPolyClick}
              onMouseover={this.onPolyHover}
              onMouseout={this.onPolyHoverOut}
            />
          ))}
        </Map>
      </div>
    );

3. 然后这里是我在上述事件中调用的函数。在 onClick 中，我使用道具获取路径。在 onPolyHover 中，当您将鼠标悬停在单个多边形上时，我polygon使用该方法获取路径，getPaths然后用于setOptions更改 fillColor。在 onPolyHoverOut 中，我将 fillColor 改回原来的 fillColor。

onPolyClick = (props,polygon, e) => {
    console.log("onclick:");
    console.log(props.paths);
  };

  onPolyHover = (props, polygon, e) => {
    console.log("onHover:");
    console.log(polygon.getPaths());
    polygon.setOptions({ fillColor: "#ff00ff" });
  };

  onPolyHoverOut = (props, polygon, e) => {
    console.log("onHover:");

    polygon.setOptions({ fillColor: "#0000FF" });
  };

请参阅此工作代码。注意：使用您的 API 密钥使代码工作。