React Native for Arcgis 地图开发 影像RasterLayer
import React, { Component } from 'react';
import { View, StyleSheet } from 'react-native';
import MapView from 'react-native-mapview';
import { RasterLayer } from '@arcgis/core';
export default class RasterLayerExample extends Component {
constructor(props) {
super(props);
this.state = {
rasterLayer: null,
};
}
componentDidMount() {
// 创建RasterLayer实例
const rasterLayer = new RasterLayer({
url: 'https://sampleserver6.arcgisonline.com/arcgis/rest/services/NLDI/ArcGIS_Rest_Services_World/MapServer',
});
this.setState({ rasterLayer });
}
render() {
const { rasterLayer } = this.state;
return (
<View style={styles.container}>
{rasterLayer && (
<MapView style={styles.mapView} mapProperties={{ basemap: 'satellite' }}>
{/* 将RasterLayer作为子组件添加到MapView中 */}
<rasterLayer.layer />
</MapView>
)}
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
},
mapView: {
flex: 1,
},
});
这段代码展示了如何在React Native应用程序中使用ArcGIS的RasterLayer。首先,在组件挂载后,创建并初始化RasterLayer实例。然后,在render方法中,当rasterLayer实例存在时,将其作为子组件嵌入到MapView中,并设置卫星卫星底图作为地图的底图。
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