diff --git a/IMG_0223.jpg b/IMG_0223.jpg
deleted file mode 100644
index d08bda0..0000000
Binary files a/IMG_0223.jpg and /dev/null differ
diff --git a/IMG_0223.png b/IMG_0223.png
new file mode 100644
index 0000000..c438779
Binary files /dev/null and b/IMG_0223.png differ
diff --git a/README.md b/README.md
index 5e77611..c93dcfb 100644
--- a/README.md
+++ b/README.md
@@ -21,8 +21,7 @@
 * [x] 后台抢红包 
 * [x] 群聊过滤
 * [x] 关键词过滤
-* [x] 消息防撤回   
-* [x] 消息防撤回   
+* [x] 消息防撤回     
 * [x] 微信步数修改   
 * [x] 小游戏作弊（剪刀石头布和掷骰子）     
 * [x] CallKit锁屏接视频语音
@@ -31,7 +30,7 @@
 安装后在微信设置中点击“微信小助手”  
 更多请查看下图：  
 
-![IMG_0223](./IMG_0223.jpg)
+![IMG_0223](./IMG_0223.png)
 
 ## 使用：  
 1.源码学习   
diff --git a/dkhelper/dkhelperDylib/DKHelperSettingController.m b/dkhelper/dkhelperDylib/DKHelperSettingController.m
index 1df0219..2fb9bf7 100644
--- a/dkhelper/dkhelperDylib/DKHelperSettingController.m
+++ b/dkhelper/dkhelperDylib/DKHelperSettingController.m
@@ -210,7 +210,7 @@
                        @"用英文双逗号分隔，例(赞,,👍,,...)"][type.intValue];
     WCUIAlertView * alert = [[objc_getClass("WCUIAlertView") alloc] initWithTitle:title message:msg];
     [alert addBtnTitle:@"确定" target:self sel:@selector(changelikeCountOK:)];
-    [alert showTextFieldWithMaxLen:5];
+    [alert showTextFieldWithMaxLen:type.intValue == 2 ? 10000: 5];
     [alert setTextFieldDefaultText:str];
     [alert show];
 }