Cannot set property ‘’ of undefined;
发布于 5 年前 作者 dwang 2396 次浏览 来自 问答

Hi All,

我在Data 里面定议了:

 persons:[{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’}]

但在一下wx.request 的success里面对返回的字符串进行解释后,想对persons进行循环赋值。

在一个For的语句里写:

persons[i].My_Names = My_Name_temp;

报如下的错。

thirdScriptError

Cannot set property ‘My_Names’ of undefined;at api request success callback function

TypeError: Cannot set property ‘My_Names’ of undefined

试着改成:

persons[0].My_Names = My_Name_temp;就没有报错。但循环语句不能直接写成这样0,1,2…

如何搞?

3 回复

一楼正解!

有道理!我把{}里面的东西重复了10次,就没这报错了!

但这样定义data,好像有点怪怪的。有没有简洁的写法。

persons:[{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’},{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’},{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’},{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’},{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’},{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’},{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’},{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’},{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’},{My_Names:’’,WX_Pics:’’,My_Enroll_Years:’’,My_Majors:’’,My_Business:’’,My_Phones:’’}],

醉了,你这数组长度就是1,还用for循环,persons[0]以外的当然都是null

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