refactor: 重构登录逻辑使用 async/await

app.js

@@ -1,5 +1,6 @@
 // app.js
 const { BASE_URL, API } = require('./utils/config')
+const { request } = require('./utils/api')
 
 App({
   onLaunch() {
@@ -24,35 +25,28 @@ App({
     })
   },
 
-  loginWithCode(code) {
-    wx.request({
-      url: BASE_URL + API.LOGIN,
-      method: 'GET',
-      data: { code },
-      success: (res) => {
-        const result = res.data
-        if (result && result.code === 0 && result.data) {
-          const userInfo = {
-            openid: result.data.openid,
-            sessionKey: result.data.session_key,
-            unionid: result.data.unionid || ''
-          }
-          this.globalData.userInfo = userInfo
-          this.globalData.isLoggedIn = true
-          wx.setStorageSync('userInfo', userInfo)
-          if (this.loginReadyCallback) {
-            this.loginReadyCallback(userInfo)
-          }
-        } else {
-          console.error('后端登录失败', result)
-          this.handleLoginFail()
-        }
-      },
-      fail: (err) => {
-        console.error('请求后端登录接口失败', err)
-        this.handleLoginFail()
+  async loginWithCode(code) {
+    try {
+      const data = await request({
+        url: BASE_URL + API.LOGIN,
+        method: 'GET',
+        data: { code }
+      })
+      const userInfo = {
+        openid: data.openid,
+        sessionKey: data.session_key,
+        unionid: data.unionid || ''
       }
-    })
+      this.globalData.userInfo = userInfo
+      this.globalData.isLoggedIn = true
+      wx.setStorageSync('userInfo', userInfo)
+      if (this.loginReadyCallback) {
+        this.loginReadyCallback(userInfo)
+      }
+    } catch (err) {
+      console.error('后端登录失败', err)
+      this.handleLoginFail()
+    }
   },
 
   handleLoginFail() {