小程序表单提交必须提交两次才能成功？第一次提交是undefined 有那位朋友遇到过类似问题，求解决方法，代码如下： Page({   data: {     postData: [],   },    formSubmit:function(e){         console.log(e.detail.value)         this.setData({postData:e.detail.value});     },     add: function () {         var self=this;         var postParams = "is_ajax=1"             +"&data[title]="  + self.data.postData.title             +"&data[content]="  + self.data.postData.content             +"&catid=11";         wx.request({             url: post_url,             data: postParams,             method: 'post',             header: {                 'Content-Type': 'application/x-www-form-urlencoded',             },             success: function (res) {                 console.log(res.data);                 if (res.data.code) {                     wx.showToast({                         title: res.data.msg,                         icon: 'success'                     })                 }                 else {                     wx.showModal({                         showCancel: false,                         content: res.data.msg                     })                 }             }         })     },