im fix

-'use strict';
-
-const _ = require('lodash');
-const crypto = global.yoho.crypto;
-const config = global.yoho.config;
-
-const ImService = new global.yoho.ApiBase(config.domains.imCs, {
-    name: 'im',
-    cache: global.yoho.cache,
-    useCache: false
-});
-
-const encryptedUid = uid => crypto.encryption(null, uid + '');
-
-/**
- *  新建留言信息
- *  path: {host}/leavemessage/saveLeavemessage
- *
- *  @param {int} uid 用户id
- *  @param {int} conversationId 会话id
- *  @param {str} content 留言内容
- */
-exports.saveMessage = (uid, conversationId, content) => {
-    let params = {
-        uid,
-        conversationId,
-        content,
-        encryptedUid: encryptedUid(uid)
-    };
-
-
-    return ImService.post('/api/leavemessage/saveLeavemessage', params);
-};
-
-
-
-/**
- *  查询用户聊天记录
- *  @param {int} uid 用户uid
- *  @param [int] pageSize 每次加载的聊天记录
- *  @param [int] startTime
- *  @param [int] endTime
- */
-exports.fetchImHistory = (uid, endTime, pageSize, startTime) => {
-    pageSize = pageSize || 10;
-
-    let params = {
-        uid,
-        pageSize,
-        encryptedUid: encryptedUid(uid)
-    };
-
-    _.forEach({startTime, endTime}, (val, key) => {
-        val && (params[key] = val);
-    });
-
-    return ImService.get('/api/conversationMessage/pageList', params)
-        .then(result => {
-            return result;
-        }, () => {
-            return {
-                code: 500,
-                data: {
-                    records: [], totalCount: 0
-                }
-            };
-        });
-};
-
-/**
- *  获取用户订单, 默认最近10笔
- *  @param {int} uid 用户uid
- *  @param {init} createTimeBegin 开始时间
- */
-exports.fetchOrderList = (uid, createTimeBegin) => {
-    let params = {
-        uid,
-        encryptedUid: encryptedUid(uid),
-        imgSize: '90x120',
-    };
-
-    _.forEach({createTimeBegin}, (key, val) => {
-        val && (params[key] = val);
-    });
-
-    return ImService.get('/api/order/queryLastTenOrder', params);
-};
-
-
-
-/**
- *
-新建评价信息
-### url
-```
-{host}/evalute/saveEvalute
-```
-### 请求参数说明
-| 名称             | 类型     | 是否必须 | 描述              |
-| -------------- | ------ | ---- | --------------- |
-| conversationId | long   | Y    | 会话id            |
-| uid            | int    | Y    | 用户ID            |
-|encryptedUid    | String |Y     |加密的用户标识 |
-| promoter       | int    | Y    | 评价发起者 1 用户 2 客服 |
-| stars          | int    | Y    | 评分星级            |
-| reasonIds      | string | N    | 固定原因Id用冒号隔开     |
-| reasonMsgs     | string | N    | 固定原因用分号隔开       |
-| reasonMsg      | string | N    | 其他原因            |
-
- */
-exports.saveEvalute = (uid, conversationId, promoter, stars, reasonMsg) => {
-    let params = {
-        conversationId,
-        uid,
-        encryptedUid: encryptedUid(uid),
-        promoter,
-        stars,
-        reasonMsg
-    };
-
-    return ImService.post('/api/evalute/saveEvalute', params);
-};
-
-
-/**
- *  获取全球购的订单
- */
-
-exports.queryGlobalOrder = uid => {
-    let params = {
-        uId: uid
-    };
-
-    return ImService.get('/api/order/queryGlobalOrder', params);
-};

@@ -140,10 +140,6 @@ html, body {
         text-align: right;
     }
 
-    .nav-back {
-        text-align: left;
-    }
-
     /* 客服在线 */
     .online {
         .chat-status {
@@ -176,6 +172,10 @@ html, body {
 }
 
 body.app-ios {
+    .nav-back {
+        text-align: left;
+    }
+
     #chat-window,
     .connection-failed,
     .chat-page {