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我正在使用胜利原生图表来呈现饼图。我对如何将从 Rest API 获取的数据传递给传递给饼图的 {data} 的“y”值感到困惑。这是我的代码：

import React, {Component} from "react";
import { StyleSheet, View } from "react-native";
import axios from 'axios'
import { VictoryPie, VictoryGroup, VictoryTheme } from "victory-native";
import Svg from 'react-native-svg';

export default class Chart extends Component {

  state= {
    id: '********************',
    data: []
}
componentDidMount(){

    var headers = {
        'Content-Type': 'application/x-www-form-urlencoded',
        'Access-Control-Allow-Headers': 'x-access-token',
        'x-access-token': this.state.id
    }

    axios.post('http://bi.servassure.net/api/SalesOverviewOEMLevel2', {
        oem:'all'
    }, 
    {headers: headers}).then((res) => {

        let TotalSales = res.data.data[0].TotalSales;

        this.setState({
          data: TotalSales
        })
        console.log(this.state.data);
    })
    .catch(err => {
        console.log(err)
    });

}

  render() {
    const myColorScale = ["#1b4f72", "#21618c", "#2e86c1","#3498db", "#76d7c4", "#d1f2eb"];
    const data = [
      { x: 1, y: 6, i: 0 },
      { x: 2, y: 2, i: 1 },
      { x: 3, y: 3, i: 2 },
      { x: 4, y: 5, i: 3 },
    ]
    return (
      <View style={styles.container}>
        <Svg
            height={200}
            width={200}
            viewBox={'0 0 300 300'}
            preserveAspectRatio='none'
        >
        <VictoryGroup width={300} theme={VictoryTheme.material}>

          <VictoryPie 
          style={{
              data: {
                fill: (d) => myColorScale[d.i]
              },
              labels: { fill: "white", fontSize: 10, fontWeight: "bold" }
            }} 
            radius={100}
            innerRadius={60}
            labelRadius={70}
            data={data}
            labels={(d) => `y: ${d.y}`}

          />

        </VictoryGroup>
        </Svg>
      </View>
    );
  }
}

这是我想作为“Y”值传递给图表的数据的控制台形式： 从控制台休息 API 数据

静态数据完美地呈现图表，但在如何循环值上停留在动态上。请帮忙弄清楚。

4

1 回答 1

3

您需要转换数据以匹配示例数据：

尝试这个：

const your_data = this.state.data.map((val, index) => {
   // you can also pass an i- value, but that's up to you
   return { x: index, y: val }; 
});

接着：

<VictoryPie 
          style={{
              data: {
                fill: (d) => myColorScale[d.x] // d.x, because i didn't specify an "i-value"
              },
              labels: { fill: "white", fontSize: 10, fontWeight: "bold" }
            }} 
            radius={100}
            innerRadius={60}
            labelRadius={70}
            data={your_data} // pass here your new data 
            labels={(d) => `y: ${d.y}`}
/>
于 2019-06-19T10:56:47.873 回答