题库适配

src/components/problems/index.js

 import React, { Component } from 'react';
 import './index.scss'
 import { HeaderBar, CallApp, CaptchaAli } from "@common/index"
-import { http } from "@/utils"
+import { browser, getParam, http } from "@/utils"
 import { Toast } from "antd-mobile";
 import { Link } from 'react-router-dom'
 
@@ -16,7 +16,6 @@ class Problems extends Component {
   }
 
   componentDidMount() {
-    console.log(document.referrer)
     this.getProblem()
   }
 
@@ -72,9 +71,26 @@ class Problems extends Component {
       })
   }
 
-  /* goBack = () => {
-     console.log(document.referrer)
-   }*/
+  goBack = () => {
+    if (document.referrer.includes(API.www)) {
+      history.go(-1)
+    } else {
+      const {state, hash} = this.props.location
+      if (hash.includes('goback')) {
+        return window.history.go(-1)
+      }
+      if (browser.isWeixin && getParam('code') && getParam('state')) {
+        window.history.go(-2)
+      }
+      if (state.records && state.records.length > 1) {
+        window.history.go(-1);
+      } else if (state.from && state.from.pathname) {
+        location.replace(`${state.from.pathname}${state.from.search}`)
+      } else {
+        window.location.href = window.location.origin
+      }
+    }
+  }
 
 
   render() {