微信小程序异常，this.setDate is not a function报错求解

Question

test.js

Page({
data:{
v1:"v1111",
},

onLoad:function(options){
// 生命周期函数--监听页面加载
console.log("onLoad start...");

this.setDate({
v4:"v4444"
})

console.log("onLoad finish!");
},

test.wxml

<view><text>{{v1}}</text></view>
<view><text>v2</text></view>
<view><text>v3</text></view>
<view><text>{{v4}}</text></view>

-------------------------------
异常信息

thirdScriptError
this.setDate is not a function;at "pages/test/test" page lifeCycleMethod onLoad function
TypeError: this.setDate is not a function
at e.onLoad (http://1633418664.appservice.open.weixin.qq.com/pages/test/test.js:12:10)
at e.<anonymous> (http://1633418664.appservice.open.weixin.qq.com/WAService.js:3:28856)
at w (http://1633418664.appservice.open.weixin.qq.com/WAService.js:3:19253)
at T (http://1633418664.appservice.open.weixin.qq.com/WAService.js:3:20809)
at .<anonymous> (http://1633418664.appservice.open.weixin.qq.com/WAService.js:3:22347)
at http://1633418664.appservice.open.weixin.qq.com/WAService.js:3:26239
at http://1633418664.appservice.open.weixin.qq.com/WAService.js:1:30174
at Array.forEach (native)
at .<anonymous> (http://1633418664.appservice.open.weixin.qq.com/WAService.js:1:30154)
at http://1633418664.appservice.open.weixin.qq.com/WAService.js:2:6460

这么简单的代码，是我写错了吗？开发工具版本140900

Answer 1

this.setDate({
v4:"v4444"
})

this.setData 写错了

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