向Marker-React-Native MapView添加不同图像的函数

Question

通过使用本文https://medium.com/@clarkjohnson_85334/adding-fetched-markers-to-my-react-native-maps-app-5f068c7be14d，我成功地在MapView中集成了观察结果。

 mapMarkers = () => {
    return this.state.items.map((item) => <Marker
        key={item.id}
        coordinate={{ latitude: item.geoLocation.latitude, longitude: item.geoLocation.longitude }}
        title={item.acceptedVernacularName}
        description={item.scientificName}
    >
    </Marker >)
}

JSON文件

Answer 1

制作这样的函数，根据您的类型获取自定义图标

getIconFromType(type) {
        var icon = require("../image_path/");
        switch (type) {
            case "A": icon = require("../image_path/image_a.png");
                break
            case "B": icon = require("../image_path/image_b.png");
                break
            default: icon = require("../image_path/image_b.png");
                break
        }
        return icon
 }

然后使用此方法根据您的id在标记中应用自定义图标

<Marker  ...other props>
 <Image source={this.getIconFromType(item.type)} resizeMode={'contain'} style={{ height: 30, width: 30 }} />
</Marker>