diff --git a/ChatKit/Class/Module/Conversation/Controller/LCCKConversationViewController.m b/ChatKit/Class/Module/Conversation/Controller/LCCKConversationViewController.m
index 8f2fea1b..891af78b 100644
--- a/ChatKit/Class/Module/Conversation/Controller/LCCKConversationViewController.m
+++ b/ChatKit/Class/Module/Conversation/Controller/LCCKConversationViewController.m
@@ -185,6 +185,10 @@ - (void)setup {
     }
 }
 
+- (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
 #ifdef CYLDebugging
 - (BOOL)willDealloc {
     if (![super willDealloc]) {
@@ -221,6 +225,10 @@ - (void)viewDidLoad {
     [[LCCKUserSystemService sharedInstance] fetchCurrentUserInBackground:^(id<LCCKUserDelegate> user, NSError *error) {
         self.user = user;
     }];
+    
+    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(userWillSendMsgWithoutPower) name:LCCKNotificationRecordNoPower object:nil];
+    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(recieveNewMsgForLengthOut) name:LCCKNotificationTextLengthOut object:nil];
+
     [self.chatViewModel setDefaultBackgroundImage];
     self.navigationItem.title = LCCKLocalizedStrings(@"Chat");//@"聊天";
     !self.viewDidLoadBlock ?: self.viewDidLoadBlock(self);
@@ -410,6 +418,28 @@ - (void)makeSureSendValidMessage:(id)message afterFetchedConversationShouldWithA
     }
 }
 
+#pragma mark - Notification
+
+- (void)userWillSendMsgWithoutPower {
+    [self showWaring:@"需要开启麦克风权限"];
+}
+
+- (void)recieveNewMsgForLengthOut {
+    [self showWaring:@"每次输入最多1000字~"];
+}
+
+- (void)showWaring:(NSString *)message {
+    // 没有找到Toast 只能用弹框
+    LCCKAlertController *alert = [LCCKAlertController alertControllerWithTitle:nil
+                                                                       message:message
+                                                                preferredStyle:LCCKAlertControllerStyleAlert];
+    NSString *cancelActionTitle = LCCKLocalizedStrings(@"ok");
+    LCCKAlertAction *cancelAction = [LCCKAlertAction actionWithTitle:cancelActionTitle style:LCCKAlertActionStyleDefault
+                                                             handler:^(LCCKAlertAction * action) {}];
+    [alert addAction:cancelAction];
+    [alert showWithSender:nil controller:self animated:YES completion:NULL];
+}
+
 #pragma mark - UI init
 
 - (void)initBarButton {
diff --git a/ChatKit/Class/Module/Conversation/View/ChatBar/LCCKChatBar.m b/ChatKit/Class/Module/Conversation/View/ChatBar/LCCKChatBar.m
index 57a4bb04..2bcedbd9 100644
--- a/ChatKit/Class/Module/Conversation/View/ChatBar/LCCKChatBar.m
+++ b/ChatKit/Class/Module/Conversation/View/ChatBar/LCCKChatBar.m
@@ -45,6 +45,7 @@ @interface LCCKChatBar () <UITextViewDelegate, UINavigationControllerDelegate, M
 @property (assign, nonatomic) CGFloat oldTextViewHeight;
 @property (nonatomic, assign, getter=shouldAllowTextViewContentOffset) BOOL allowTextViewContentOffset;
 @property (nonatomic, assign, getter=isClosed) BOOL close;
+@property (nonatomic, assign) BOOL isTimeOut;//是否超时
 
 #pragma mark - MessageInputView Customize UI
 ///=============================================================================
@@ -123,6 +124,8 @@ - (void)setupConstraints {
 - (void)dealloc {
     self.delegate = nil;
     _faceView.delegate = nil;
+    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidEnterBackgroundNotification object:nil];
+    [[NSNotificationCenter defaultCenter] removeObserver:self name:LCCKNotificationRecordTimeOut object:nil];
     [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
     [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
 }
@@ -246,6 +249,19 @@ - (BOOL)textViewShouldBeginEditing:(UITextView *)textView {
 #pragma mark -
 #pragma mark - Private Methods
 
+- (BOOL)judgeAVAudioSession {
+    __block BOOL bCanRecord = YES;
+    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
+    [audioSession requestRecordPermission:^(BOOL granted) {
+        if (granted) {
+            bCanRecord = YES;
+        } else {
+            bCanRecord = NO;
+        }
+    }];
+    return bCanRecord;
+}
+
 - (void)updateChatBarConstraintsIfNeeded {
     NSString *reason = [NSString stringWithFormat:@"🔴类名与方法名：%@（在第%@行），描述：%@", @(__PRETTY_FUNCTION__), @(__LINE__), @"Should update on main thread"];
     NSAssert([NSThread mainThread], reason);
@@ -345,7 +361,8 @@ - (void)endConvertWithMP3FileName:(NSString *)fileName {
 }
 
 - (void)failRecord {
-    [LCCKProgressHUD dismissWithProgressState:LCCKProgressError];
+    // 此回调在录音时长小于1时调用 应该提示Short而不是Error
+    [LCCKProgressHUD dismissWithProgressState:LCCKProgressShort];
 }
 
 - (void)beginConvert {
@@ -474,6 +491,7 @@ - (UIView *)inputBarBackgroundView {
 
 - (void)setup {
     self.close = NO;
+    self.isTimeOut = NO;
     self.oldTextViewHeight = kLCCKChatBarTextViewFrameMinHeight;
     self.allowTextViewContentOffset = YES;
     self.MP3 = [[Mp3Recorder alloc] initWithDelegate:self];
@@ -494,6 +512,10 @@ - (void)setup {
         make.left.and.right.and.top.equalTo(self.inputBarBackgroundView);
         make.height.mas_equalTo(.5f);
     }];
+    
+    //修复录音时点击Home键 在返回App后 仍然显示录音动效的问题
+    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appBecomeBackgroundCancelRecordVoice) name:UIApplicationDidEnterBackgroundNotification object:nil];
+    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appRecieveMsgFromRecordTimer) name:LCCKNotificationRecordTimeOut object:nil];
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
     self.backgroundColor = self.messageInputViewBackgroundColor;
@@ -504,9 +526,14 @@ - (void)setup {
  *  开始录音
  */
 - (void)startRecordVoice {
-    [LCCKProgressHUD show];
-    self.voiceRecordButton.highlighted = YES;
-    [self.MP3 startRecord];
+    // 判断权限
+    if ([self judgeAVAudioSession]) {
+        [LCCKProgressHUD show];
+        self.voiceRecordButton.highlighted = YES;
+        [self.MP3 startRecord];
+    } else {
+        [[NSNotificationCenter defaultCenter] postNotificationName:LCCKNotificationRecordNoPower object:nil];
+    }
 }
 
 /**
@@ -522,9 +549,12 @@ - (void)cancelRecordVoice {
  *  录音结束
  */
 - (void)confirmRecordVoice {
-    [self.MP3 stopRecord];
+    if (self.isTimeOut == NO) {
+        [self.MP3 stopRecord];
+    } else {
+        self.isTimeOut = NO;
+    }
 }
-
 /**
  *  更新录音显示状态,手指向上滑动后提示松开取消录音
  */
@@ -539,6 +569,26 @@ - (void)updateContinueRecordVoice {
     [LCCKProgressHUD changeSubTitle:@"向上滑动取消录音"];
 }
 
+/**
+ *  进入后台 取消当前的录音
+ */
+- (void)appBecomeBackgroundCancelRecordVoice {
+    [self cancelRecordVoice];
+}
+
+/**
+ *  倒计时结束 完成当前的录音
+ */
+- (void)appRecieveMsgFromRecordTimer
+{
+    if (self.voiceRecordButton.highlighted == YES) {
+        self.voiceRecordButton.selected = NO;
+        self.voiceRecordButton.highlighted = NO;
+        [self.MP3 stopRecord];
+        self.isTimeOut = YES;
+    }
+}
+
 - (void)setShowType:(LCCKFunctionViewShowType)showType {
     if (_showType == showType) {
         return;
@@ -664,6 +714,10 @@ - (void)sendTextMessage:(NSString *)text{
     if (!text || text.length == 0 || [text lcck_isSpace]) {
         return;
     }
+    if (text.length > 1000) {
+        [[NSNotificationCenter defaultCenter] postNotificationName:LCCKNotificationTextLengthOut object:nil];
+        return;
+    }
     if (self.delegate && [self.delegate respondsToSelector:@selector(chatBar:sendMessage:)]) {
         [self.delegate chatBar:self sendMessage:text];
     }
diff --git a/ChatKit/Class/Module/Conversation/View/ChatBar/LCCKProgressHUD.m b/ChatKit/Class/Module/Conversation/View/ChatBar/LCCKProgressHUD.m
index be1ba144..cf19e36f 100644
--- a/ChatKit/Class/Module/Conversation/View/ChatBar/LCCKProgressHUD.m
+++ b/ChatKit/Class/Module/Conversation/View/ChatBar/LCCKProgressHUD.m
@@ -8,6 +8,7 @@
 
 #import "LCCKProgressHUD.h"
 #import "UIImage+LCCKExtension.h"
+#import "LCCKConstants.h"
 
 @interface LCCKProgressHUD ()
 
@@ -73,7 +74,17 @@ - (void)timerAction {
     } else {
         self.centerLabel.textColor = [UIColor yellowColor];
     }
-    self.centerLabel.text = [NSString stringWithFormat:@"%.1f",second-0.1];
+    //修复录音时长恰好为1S时 提示中显示“-1”的问题
+    if (second>0) {
+        self.centerLabel.text = [NSString stringWithFormat:@"%.1f",second-0.1];
+    } else {
+        if (_timer) {
+            [[NSNotificationCenter defaultCenter] postNotificationName:LCCKNotificationRecordTimeOut object:nil];
+            [_timer invalidate];
+            _timer = nil;
+        }
+    }
+    
     [UIView commitAnimations];
 }
 
@@ -128,7 +139,7 @@ - (void)setProgressState:(LCCKProgressState)progressState {
             self.centerLabel.text = @"录音成功";
             break;
         case LCCKProgressShort:
-            self.centerLabel.text = @"时间太短,请重试";
+            self.centerLabel.text = @"时间太短";//文本过长 无法显示
             break;
         case LCCKProgressError:
             self.centerLabel.text = @"录音失败";
diff --git a/ChatKit/Class/Module/Conversation/View/ChatMessageCell/LCCKChatMessageCell.m b/ChatKit/Class/Module/Conversation/View/ChatMessageCell/LCCKChatMessageCell.m
index f65577b5..fe7b9f8b 100644
--- a/ChatKit/Class/Module/Conversation/View/ChatMessageCell/LCCKChatMessageCell.m
+++ b/ChatKit/Class/Module/Conversation/View/ChatMessageCell/LCCKChatMessageCell.m
@@ -398,7 +398,9 @@ - (UIImageView *)avatarImageView {
         if (avatarImageViewCornerRadiusBlock) {
             CGSize avatarImageViewSize = CGSizeMake(kAvatarImageViewWidth, kAvatarImageViewHeight);
             CGFloat avatarImageViewCornerRadius = avatarImageViewCornerRadiusBlock(avatarImageViewSize);
-            self.avatarImageView.lcck_cornerRadius = avatarImageViewCornerRadius;
+            //导致CPU消耗达到100% 暂时替换
+            self.avatarImageView.layer.cornerRadius = avatarImageViewCornerRadius;
+            self.avatarImageView.clipsToBounds = YES;
         }
         [self bringSubviewToFront:_avatarImageView];
     }
diff --git a/ChatKit/Class/Tool/LCCKConstants.h b/ChatKit/Class/Tool/LCCKConstants.h
index e11971c7..4d224644 100644
--- a/ChatKit/Class/Tool/LCCKConstants.h
+++ b/ChatKit/Class/Tool/LCCKConstants.h
@@ -70,6 +70,22 @@ static NSString *const LCCKBadgeTextForNumberGreaterThanLimit = @"···";
 /// @name Notification Name
 ///=============================================================================
 
+
+/**
+ *  发送语音消息没有权限。通知界面提醒用户
+ */
+static NSString *const LCCKNotificationRecordNoPower = @"LCCKChatBarRecordVoiceNoPower";
+
+/**
+ *  发送文本消息过长。通知界面提醒用户
+ */
+static NSString *const LCCKNotificationTextLengthOut = @"LCCKChatBarTextLengthOut";
+
+/**
+ *  发送语音消息倒计时结束。通知UI停止动效
+ */
+static NSString *const LCCKNotificationRecordTimeOut = @"LCCKChatBarRecordVoiceTimeOut";
+
 /**
  *  未读数改变了。通知去服务器同步 installation 的badge
  */
diff --git a/ChatKit/Class/Tool/Vendor/VoiceLib/Mp3Recorder.m b/ChatKit/Class/Tool/Vendor/VoiceLib/Mp3Recorder.m
index fd0ba562..4c26721f 100755
--- a/ChatKit/Class/Tool/Vendor/VoiceLib/Mp3Recorder.m
+++ b/ChatKit/Class/Tool/Vendor/VoiceLib/Mp3Recorder.m
@@ -86,9 +86,8 @@ - (void)stopRecord
     if (cTime > 1) {
         [self audio_PCMtoMP3];
     } else {
-        
         [_recorder deleteRecording];
-        
+        // 时长小于1调用failRecord
         if ([_delegate respondsToSelector:@selector(failRecord)]) {
             [_delegate failRecord];
         }