修改获取验证码逻辑

src/containers/login/index.vue

@@ -106,7 +106,7 @@ export default {
     };
   },
   created() {
-    this.fetchVcode();
+    this.getVcode();
   },
   methods: {
     ...mapActions(['Login']),
@@ -172,13 +172,17 @@ export default {
       }
     },
     fetchVcode() {
-      fetchVcode()
+      this.getVcode().then(() => {
+        this.loginForm.vcode = '';
+        this.$refs.vcode.focus();
+      });
+    },
+    getVcode() {
+      return fetchVcode()
         .then(res => {
           console.log(res);
           const { saltKey, verifyCode } = res;
           this.verifyCode = verifyCode;
-          this.loginForm.vcode = '';
-          this.$refs.vcode.focus();
         })
         .catch(err => {
           this.$message.error('获取验证码失败！');