fix：登录跳转优化

app/libs/login.js

@@ -8,6 +8,47 @@ import auth from './wechat';
 
 import { LOGIN_STATUS, USER_INFO, EXPIRES_TIME, STATE_R_KEY, BACK_URL} from './../config/cache';
 
+const LOGIN_PAGE_ROUTE = 'pages/users/login/index';
+const WECHAT_LOGIN_PAGE_ROUTE = 'pages/users/wechat_login/index';
+
+function normalizeRoute(route) {
+	return (route || '').replace(/^\//, '');
+}
+
+function getPrevPageRoute() {
+	const pages = getCurrentPages();
+	if (pages.length < 2) {
+		return '';
+	}
+	return normalizeRoute(pages[pages.length - 2].route);
+}
+
+/**
+ * 登录页 ⇄ 微信登录页切换：上一页已是目标页则返回，避免反复 navigateTo 堆栈
+ */
+export function switchLoginPage(url) {
+	const targetRoute = normalizeRoute((url || '').split('?')[0].replace(/^\//, ''));
+	const prevRoute = getPrevPageRoute();
+	if (prevRoute && prevRoute === targetRoute && url.indexOf('?') === -1) {
+		uni.navigateBack();
+		return;
+	}
+	uni.navigateTo({ url });
+}
+
+/**
+ * 微信授权后进入账号绑定页（replace 当前页，避免栈里叠多层登录相关页面）
+ */
+export function openLoginBindPage(authKey) {
+	const url = `/pages/users/login/index?bindWechat=1&authKey=${encodeURIComponent(authKey)}`;
+	const prevRoute = getPrevPageRoute();
+	if (prevRoute === LOGIN_PAGE_ROUTE) {
+		uni.redirectTo({ url });
+		return;
+	}
+	uni.redirectTo({ url });
+}
+
 function prePage(){
 	let pages = getCurrentPages();
 	let prePage = pages[pages.length - 1];

app/pages/users/login/index.vue

@@ -88,6 +88,9 @@
 	import {
 		VUE_APP_API_URL
 	} from "@/utils";
+	import {
+		switchLoginPage
+	} from '@/libs/login';
 	// #ifdef MP-WEIXIN
 	import {
 		wxGZHAuth
@@ -520,9 +523,7 @@
 					});
 			},
 			goWechatLogin() {
-				uni.navigateTo({
-					url: "/pages/users/wechat_login/index"
-				});
+				switchLoginPage('/pages/users/wechat_login/index');
 			},
 			getUserInfo(data){
 			this.$store.commit("SETUID", data.uid);

app/pages/users/wechat_login/index.vue

@@ -63,6 +63,10 @@
 	} from '@/api/user.js'
 	import Routine from '@/libs/routine';
 	import wechat from "@/libs/wechat";
+	import {
+		switchLoginPage,
+		openLoginBindPage
+	} from '@/libs/login';
 	export default {
 		data() {
 			return {
@@ -182,24 +186,18 @@
 						title: '请先点击上方「微信登录」完成授权'
 					});
 				}
-				uni.navigateTo({
-					url: '/pages/users/login/index?bindWechat=1&authKey=' + encodeURIComponent(this.pendingBindAuthKey)
-				});
+				openLoginBindPage(this.pendingBindAuthKey);
 			},
 			/**
 			 * 新微信用户且关闭强制手机号：跳转绑定页
 			 */
 			goWechatBindLogin(authKey) {
 				this.pendingBindAuthKey = authKey;
-				uni.navigateTo({
-					url: '/pages/users/login/index?bindWechat=1&authKey=' + encodeURIComponent(authKey)
-				});
+				openLoginBindPage(authKey);
 			},
 			// #endif
 			goAccountLogin() {
-				uni.navigateTo({
-					url: '/pages/users/login/index'
-				});
+				switchLoginPage('/pages/users/login/index');
 			},
 			back() {
 				uni.navigateBack();