小程序 报错is not defined

Question

微信的小程序报错is not defined
具体报错：thirdScriptError
shangchuan is not defined;at pages/box42/box42 page test function
ReferenceError: shangchuan is not defined

程序代码
Page({
data: {
shangchuan:'https://cloud-minapp-8606.clo...',
},
test:function(){

var that = this;
var context = wx.createCanvasContext('mycanvas');//画布ID
// var path = "/images/bankcard.jpg";
context.drawImage(shangchuan, 0, 0, 686, 686);//画布的大小

//绘制图片

context.draw();

},
})

Answer 1

解决了 加了个这个 var shangchuan = this.data.shangchuan;