ec-echarts 循环canvasToTempFilePath 安卓机只执行一次？

for (let i = 0; i < data.length; i++) {
    let item = {
        onInit: function (canvas, width, height) {
            const barChart = echarts.init(canvas, null, {
                width: width,
                height: 450
            });
            canvas.setChart(barChart);
            barChart.on('finished', () => {
                console.log("finished")
                let className = `.line${i}`
                c.selectComponent(className).canvasToTempFilePath({
                    success: res => {
                        console.log(res)
                        console.log("imgs")
                        let echartsSrc  = res.tempFilePath;
                        // c.setData({
                        //     echartImgSrc: res.tempFilePath
                        // })
                        c.data.echartsImgList.push(echartsSrc);
                        if(c.data.echartsImgList.length>0){
                            c.data.showEcharts=false;
                        }
                        console.log(c.data.echartsImgList)
                        c.setData({
                            echartsImgList:c.data.echartsImgList,
                            showEcharts:c.data.showEcharts
                        });
                        wx.hideLoading();
                    },
                    fail: res => {console.log('转换图片失败', res);wx.hideLoading();}
                });
            });
            barChart.setOption(c.getLineOption(canvas, data[i]));
            return barChart;
        }
    };
    c.data.ecList.push(item);
}