使用pinch 直接报错TypeError: Cannot read property 'get' of undefined

[ghost]

拷贝的是官方代码，请帮忙看一下问题。
let chart = null;
var data = [];
var step = Math.PI / 4;
for (var x = -25; x < 25; x += step) {
data.push({
x: x,
y: Math.sin(x)
});
}

function initChart(canvas, width, height, F2) {
chart = new F2.Chart({
el: canvas,
width,
height
});
chart.source(data);
chart.axis('x', {
grid: function grid(text) {
if (text == 0) {
return {
lineDash: null
};
}
}
});
chart.axis('y', {
grid: function grid(text) {
if (text == 0) {
return {
lineDash: null
};
}
}
});
chart.tooltip(false);
chart.interaction('pan', {
limitRange: {
x: {
min: -100,
max: 100
}
}
});
chart.interaction('pinch', {
maxScale: 5,
minScale: 1
});
chart.line().position('x*y').shape('smooth');
chart.render();
return chart;
}

Page({
onShareAppMessage: function(res) {
return {
title: 'F2 微信小程序图表组件，你值得拥有~',
path: '/pages/index/index',
success: function() {},
fail: function() {}
}
},
data: {
opts: {
onInit: initChart
}
},
onReady() {}
});

[zingx-zhn]

请问这个问题解决了吗 我也遇到了