在点击时向Google地图显示标记

Question

I'm using the Google map react package to integrate google map in my react project. I could render the map markers with the lat, long that i have in my json array. But on clicking the map the marker to show the clicked area is not displaying but i'm getting the lat, lng values with _onClick function

_onClick = ({x, y, lat, lng, event}) => {
    this.setState({
        lat: lat, lng: lng
    }); 
}
<GoogleMapReact onClick={this._onClick}
    center={this.state.center}
    defaultZoom={this.props.zoom} 
    options = {{ mapTypeId: 'satellite' }}
    style={{height: '680px', width: '560px'}}
>
    {this.state.markers.map((marker, i) =>{
          return(
                 <AnyReactComponent key={i}
                      lat={marker.lat}
                      lng={marker.lng}
                      img_src={marker.img_src}
                  />

                )
    })}      
</GoogleMapReact>

How can i solve this to display the marker on the clicked area?

Answer 1

You are storing the lat,lng for the clicked area, so you need to render the marker for those values. Use one more state variable isClick , update that value on click of map, and render the marker conditionally.

Like this:

_onClick = ({x, y, lat, lng, event}) => {
    this.setState({
        lat: lat, 
        lng: lng,
        isClicked: true
    }); 
}

<GoogleMapReact onClick={this._onClick}
    center={this.state.center}
    defaultZoom={this.props.zoom} 
    options = {{ mapTypeId: 'satellite' }}
    style={{height: '680px', width: '560px'}}
>
    {this.state.markers.map((marker, i) => {
        return(
            <AnyReactComponent key={i}
                lat={marker.lat}
                lng={marker.lng}
                img_src={marker.img_src}
            />

        )
    })} 
    {this.state.isClicked? 
        <AnyReactComponent key={i}
            lat={this.state.lat}
            lng={this.state.lng}
            img_src={marker.img_src}
        /> 
    :null}   
</GoogleMapReact>