修改登录报错问题

src/pages/login/index.vue

@@ -37,6 +37,7 @@ export default {
   },
   data() {
     return {
+      code: "",
       session_key: "",
       shopName: "",
       logoUrl: "",
@@ -66,6 +67,32 @@ export default {
     };
   },
   created() {},
+  onShow() {
+    wx.checkSession({
+      success : () => {
+        //session_key 未过期，并且在本生命周期一直有效
+        wx.login({
+          success: res => {
+            this.code = res.code;
+          },
+          fail: err => {
+            reject(err);
+          }
+        }) //重新登录
+      },
+      fail : () => {
+        // session_key 已经失效，需要重新执行登录流程
+        wx.login({
+          success: res => {
+            this.code = res.code;
+          },
+          fail: err => {
+            reject(err);
+          }
+        }) //重新登录
+      }
+    })
+  },
   onLoad(options) {
     Object.assign(this.$data, this.$options.data()); //mpvue 的混合周期 使用小程序生命周期数据未初始化
     if (options.back) {
@@ -103,30 +130,21 @@ export default {
     },
     init() {
       return new Promise((resolve, reject) => {
-        wx.login({
-          success: res => {
-            if (res.code) {
-              login
-                .miniLogin({ code: res.code,
-                              spokesmanRelId : this.$store.state.spokesmanRelId,
-                              spokesmanGroupId : this.$store.state.spokesmanGroupId,
-                              spokesmanShopId : this.$store.state.spokesmanShopId
-                               })
-                .then(res => {
-                  if (res.data.code == 200) {
-                    resolve(res);
-                  } else {
-                    reject(res.data.msg);
-                  }
-                })
-                .catch(err => {
-                  reject(err);
-                });
-            }
-          },
-          fail: err => {
-            reject(err);
+        login
+        .miniLogin({ code: this.code,
+          spokesmanRelId : this.$store.state.spokesmanRelId,
+          spokesmanGroupId : this.$store.state.spokesmanGroupId,
+          spokesmanShopId : this.$store.state.spokesmanShopId
+        })
+        .then(res => {
+          if (res.data.code == 200) {
+            resolve(res);
+          } else {
+            reject(res.data.msg);
           }
+        })
+        .catch(err => {
+          reject(err);
         });
       });
     },