ball-applet/pages/coaAdmin/lecturestat/list.js

const app = getApp()
import * as echarts from '../../../commpents/ec-canvas/echarts'
Page({
    data: {
        frameStyle: { useTop: true, name: '授课情况', leftArrow: true, useBar: false },
        // xdata: []
    },
    // 返回
    back(e) {
        wx.navigateBack({ delta: 1 })
    },
    /**
     * 生命周期函数--监听页面加载
     */
    onLoad: function (options) {
    },
    // 监听用户是否登录
    watchLogin: async function () {
        const that = this;
        wx.getStorage({
            key: 'user',
            success: async res => {
                that.setData({ ec: { onInit: that.initChart } })
                that.data.xdata = [
                    { value: 2, name: '1月' },
                    { value: 10, name: '2月' },
                    { value: 19, name: '3月' },
                    { value: 20, name: '4月' },
                    { value: 70, name: '5月' },
                    { value: 9, name: '6月' },
                    { value: 12, name: '7月' },
                    { value: 41, name: '8月' },
                    { value: 31, name: '9月' },
                    { value: 13, name: '10月' },
                    { value: 16, name: '11月' },
                    { value: 10, name: '12月' }
                ];
            },
            fail: async res => {
                wx.redirectTo({ url: '/pages/index/index' })
            }
        })
    },
    // 饼图
    initChart(canvas, width, height, dpr) {
        let that = this;
        var xdata = that.data.xdata;
        const chart = echarts.init(canvas, null, { width: width, height: height, devicePixelRatio: dpr });
        canvas.setChart(chart);
        var option = {
            tooltip: { trigger: 'item' },
            legend: {
                orient: 'vertical',
                height: 40,
                padding: 50
            },
            series: [
                {
                    name: '课时',
                    type: 'pie',
                    radius: '50%',
                    data: xdata,
                    emphasis: {
                        itemStyle: { shadowBlur: 10, shadowOffsetX: 0, shadowColor: 'rgba(0, 0, 0, 0.5)' }
                    }
                }
            ]
        };
        chart.setOption(option, true);
        return chart;
    },
    /**
    * 生命周期函数--监听页面初次渲染完成
    */
    onReady: function () { },
    /**
     * 生命周期函数--监听页面显示
     */
    onShow: function () {
        const that = this;
        // 监听用户是否登录
        that.watchLogin();
    },
    /**
     * 页面上拉触底事件的处理函数
     */
    /**
     * 生命周期函数--监听页面隐藏
     */
    onHide: function () {

    },

    /**
     * 生命周期函数--监听页面卸载
     */
    onUnload: function () {

    },

    /**
     * 页面相关事件处理函数--监听用户下拉动作
     */
    onPullDownRefresh: function () {

    },


    /**
     * 用户点击右上角分享
     */
    onShareAppMessage: function (res) {

    },
})