之前山寨了一个新浪微博（），这几天就山寨个微信吧。之前已经把微信的视图结构简单的拖了一下（i），今天就开始给微信加上具体的实现功能，那么就先从微信的聊天界面开始吧。提到封装是少不了写代码的，在封装组件的时候，为了组件的可移植性，我们就不能用storyboard来拖拽了。为了屏幕的适配，适应不同屏幕的手机，所以在封装组件的时候是少不了为我们的组件来添加约束。今天博客中的所有代码都是脱离storyboard的，这些代码在别的工程中也是可以使用的。好，废话少说，切入今天的正题。

微信大家基本上都用过，今天要做的就是微信的聊天工具条。聊天工具条还是比较复杂的，其中包括发送表情，发送文字，发送图片，发送声音，拍照等等功能，下面给出发送录音，文字，表情的代码，其他的和这几样类似。还是那句话百字不如一图，先来几张效果图吧。

　　

　　

 

在封装聊天工具条的的时候表情键盘是之前封装好的（请参考：“”），所以拿过来就可以用的啦。因为不管是工具条还是表情键盘都是用约束来控件大小的，所以横屏也是没问题的，在大屏手机上也是没问题的。下面将会一步步讲解如何封装下面的聊天工具条。主要是对工具条的封装，表情键盘在这就不做讲解了。

　　

一、ToolView预留的接口

在封装ToolView中主要用到Block回调，读者可以根据自己的个人习惯来选择是Block回调，还是委托回调或者是目标动作回调（笔者更喜欢Block回调）,下面的代码是ToolView给调用者提供的接口

1 // 2 //  ToolView.h 3 //  MecroMessage 4 // 5 //  Created by （青玉伏案：博客地址（http://www.cnblogs.com/ludashi/）） on 14-9-22. 6 //  Copyright (c) 2014年 Mrli. All rights reserved. 7 // 8  9 #import 
      
       10 11 12 //定义block类型把ToolView中TextView中的文字传入到Controller中13 typedef void (^MyTextBlock) (NSString *myText);14 15 //录音时的音量16 typedef void (^AudioVolumeBlock) (CGFloat volume);17 18 //录音存储地址19 typedef void (^AudioURLBlock) (NSURL *audioURL);20 21 //改变根据文字改变TextView的高度22 typedef void (^ContentSizeBlock)(CGSize contentSize);23 24 //录音取消的回调25 typedef void (^CancelRecordBlock)(int flag);26 27 28 @interface ToolView : UIView
       
        29 30 31 //设置MyTextBlock32 -(void) setMyTextBlock:(MyTextBlock)block;33 34 //设置声音回调35 -(void) setAudioVolumeBlock:(AudioVolumeBlock) block;36 37 //设置录音地址回调38 -(void) setAudioURLBlock:(AudioURLBlock) block;39 40 -(void)setContentSizeBlock:(ContentSizeBlock) block;41 42 -(void)setCancelRecordBlock:(CancelRecordBlock)block;43 44 -(void) changeFunctionHeight: (float) height;45 46 @end
       
      

　　

二、初始化ToolView中所需的控件

1.为了更好的封装我们的组件，在.h中预留接口，在ToolView.m的延展中添加我们要使用的组件（私有属性），延展代码如下：

1 @interface ToolView() 2 //最左边发送语音的按钮 3 @property (nonatomic, strong) UIButton *voiceChangeButton; 4  5 //发送语音的按钮 6 @property (nonatomic, strong) UIButton *sendVoiceButton; 7  8 //文本视图 9 @property (nonatomic, strong) UITextView *sendTextView;10 11 //切换键盘12 @property (nonatomic, strong) UIButton *changeKeyBoardButton;13 14 //More15 @property (nonatomic, strong) UIButton *moreButton;16 17 //键盘坐标系的转换18 @property (nonatomic, assign) CGRect endKeyBoardFrame;19 20 21 //表情键盘22 @property (nonatomic, strong) FunctionView *functionView;23 24 //more25 @property (nonatomic, strong) MoreView *moreView;26 27 //数据model28 @property (strong, nonatomic) ImageModelClass  *imageMode;29 30 @property (strong, nonatomic)HistoryImage *tempImage;31 32 33 //传输文字的block回调34 @property (strong, nonatomic) MyTextBlock textBlock;35 36 //contentsinz37 @property (strong, nonatomic) ContentSizeBlock sizeBlock;38 39 //传输volome的block回调40 @property (strong, nonatomic) AudioVolumeBlock volumeBlock;41 42 //传输录音地址43 @property (strong, nonatomic) AudioURLBlock urlBlock;44 45 //录音取消46 @property (strong, nonatomic) CancelRecordBlock cancelBlock;47 48 49 //添加录音功能的属性50 @property (strong, nonatomic) AVAudioRecorder *audioRecorder;51 52 @property (strong, nonatomic) NSTimer *timer;53 @property (strong, nonatomic) NSURL *audioPlayURL;54 55 @end

 

2.接受相应的Block回调,把block传入ToolView中，代码如下：　　

1 -(void)setMyTextBlock:(MyTextBlock)block 2 { 3     self.textBlock = block; 4 } 5  6 -(void)setAudioVolumeBlock:(AudioVolumeBlock)block 7 { 8     self.volumeBlock = block; 9 }10 11 -(void)setAudioURLBlock:(AudioURLBlock)block12 {13     self.urlBlock = block;14 }15 16 -(void)setContentSizeBlock:(ContentSizeBlock)block17 {18     self.sizeBlock = block;19 }20 21 -(void)setCancelRecordBlock:(CancelRecordBlock)block22 {23     self.cancelBlock = block;24 }

 

3.控件的初始化，纯代码添加ToolView中要用到的组件（分配内存，配置相应的属性），因为是自定义组件的封装，所以我们的storyboard就用不上啦，添加控件的代码如下：

1 //控件的初始化 2 -(void) addSubview 3 { 4     self.voiceChangeButton = [[UIButton alloc] initWithFrame:CGRectZero]; 5     [self.voiceChangeButton setImage:[UIImage imageNamed:@"chat_bottom_voice_press.png"] forState:UIControlStateNormal]; 6     [self.voiceChangeButton addTarget:self action:@selector(tapVoiceChangeButton:) forControlEvents:UIControlEventTouchUpInside]; 7     [self addSubview:self.voiceChangeButton]; 8      9     self.sendVoiceButton = [[UIButton alloc] initWithFrame:CGRectZero];10     [self.sendVoiceButton setBackgroundImage:[UIImage imageNamed:@"chat_bottom_textfield.png"] forState:UIControlStateNormal];11     [self.sendVoiceButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];12     [self.sendVoiceButton setTitle:@"按住说话" forState:UIControlStateNormal];13     14     15     [self.sendVoiceButton addTarget:self action:@selector(tapSendVoiceButton:) forControlEvents:UIControlEventTouchUpInside];16     self.sendVoiceButton.hidden = YES;17     [self addSubview:self.sendVoiceButton];18     19     self.sendTextView = [[UITextView alloc] initWithFrame:CGRectZero];20     self.sendTextView.delegate = self;21     [self addSubview:self.sendTextView];22     23     self.changeKeyBoardButton = [[UIButton alloc] initWithFrame:CGRectZero];24     [self.changeKeyBoardButton setImage:[UIImage imageNamed:@"chat_bottom_smile_nor.png"] forState:UIControlStateNormal];25     [self.changeKeyBoardButton addTarget:self action:@selector(tapChangeKeyBoardButton:) forControlEvents:UIControlEventTouchUpInside];26     [self addSubview:self.changeKeyBoardButton];27     28     self.moreButton = [[UIButton alloc] initWithFrame:CGRectZero];29     [self.moreButton setImage:[UIImage imageNamed:@"chat_bottom_up_nor.png"] forState:UIControlStateNormal];30     [self.moreButton addTarget:self action:@selector(tapMoreButton:) forControlEvents:UIControlEventTouchUpInside];31     [self addSubview:self.moreButton];32     33     [self addDone];34     35     36     37     //实例化FunctionView38     self.functionView = [[FunctionView alloc] initWithFrame:CGRectMake(0, 0, 320, 216)];39     self.functionView.backgroundColor = [UIColor blackColor];40     41     //设置资源加载的文件名42     self.functionView.plistFileName = @"emoticons";43     44     __weak __block ToolView *copy_self = self;45     //获取图片并显示46     [self.functionView setFunctionBlock:^(UIImage *image, NSString *imageText)47      {48          NSString *str = [NSString stringWithFormat:@"%@%@",copy_self.sendTextView.text, imageText];49          50          copy_self.sendTextView.text = str;51          52          //把使用过的图片存入sqlite53          NSData *imageData = UIImagePNGRepresentation(image);54          [copy_self.imageMode save:imageData ImageText:imageText];55      }];56     57     58     //给sendTextView添加轻击手势59     UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)];60     [self.sendTextView addGestureRecognizer:tapGesture];61     62     63     //给sendVoiceButton添加长按手势64     UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(sendVoiceButtonLongPress:)];65     //设置长按时间66     longPress.minimumPressDuration = 0.2;67     [self.sendVoiceButton addGestureRecognizer:longPress];68     69     //实例化MoreView70     self.moreView = [[MoreView alloc] initWithFrame:CGRectMake(0, 0, 0, 0)];71     self.moreView.backgroundColor = [UIColor blackColor];72     [self.moreView setMoreBlock:^(NSInteger index) {73         NSLog(@"MoreIndex = %d",(int)index);74     }];75 76     77 }

 

4.给我们的控件添加相应的约束，为了适合不同的屏幕，所以自动布局是少不了的。当然啦给控件添加约束也必须是手写代码啦，添加约束的代码如下：

1 //给控件加约束 2 -(void)addConstraint 3 { 4     //给voicebutton添加约束 5     self.voiceChangeButton.translatesAutoresizingMaskIntoConstraints = NO; 6      7     NSArray *voiceConstraintH = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-5-[_voiceChangeButton(30)]" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_voiceChangeButton)]; 8     [self addConstraints:voiceConstraintH]; 9     10     NSArray *voiceConstraintV = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-8-[_voiceChangeButton(30)]" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_voiceChangeButton)];11     [self addConstraints:voiceConstraintV];12     13     14     15     //给MoreButton添加约束16     self.moreButton.translatesAutoresizingMaskIntoConstraints = NO;17     18     NSArray *moreButtonH = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[_moreButton(30)]-5-|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_moreButton)];19     [self addConstraints:moreButtonH];20     21     NSArray *moreButtonV = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-8-[_moreButton(30)]" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_moreButton)];22     [self addConstraints:moreButtonV];23     24     25     //给changeKeyBoardButton添加约束26     self.changeKeyBoardButton.translatesAutoresizingMaskIntoConstraints = NO;27     28     NSArray *changeKeyBoardButtonH = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[_changeKeyBoardButton(33)]-43-|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_changeKeyBoardButton)];29     [self addConstraints:changeKeyBoardButtonH];30     31     NSArray *changeKeyBoardButtonV = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-5-[_changeKeyBoardButton(33)]" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_changeKeyBoardButton)];32     [self addConstraints:changeKeyBoardButtonV];33     34     35     //给文本框添加约束36     self.sendTextView.translatesAutoresizingMaskIntoConstraints = NO;37     NSArray *sendTextViewConstraintH = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-45-[_sendTextView]-80-|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_sendTextView)];38     [self addConstraints:sendTextViewConstraintH];39     40     NSArray *sendTextViewConstraintV = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-10-[_sendTextView]-10-|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_sendTextView)];41     [self addConstraints:sendTextViewConstraintV];42     43     44     //语音发送按钮45     self.sendVoiceButton.translatesAutoresizingMaskIntoConstraints = NO;46     NSArray *sendVoiceButtonConstraintH = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-50-[_sendVoiceButton]-90-|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_sendVoiceButton)];47     [self addConstraints:sendVoiceButtonConstraintH];48     49     NSArray *sendVoiceButtonConstraintV = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-6-[_sendVoiceButton]-6-|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_sendVoiceButton)];50     [self addConstraints:sendVoiceButtonConstraintV];51     52     53 }

　　　　

5.因为我们要发送录音，所以对音频部分的初始化是少不了的，以下代码是对音频的初始化

1 //录音部分初始化 2 -(void)audioInit 3 { 4     NSError * err = nil; 5      6     AVAudioSession *audioSession = [AVAudioSession sharedInstance]; 7     [audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err]; 8      9     if(err){10         NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);11         return;12     }13     14     [audioSession setActive:YES error:&err];15     16     err = nil;17     if(err){18         NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);19         return;20     }21 22     //通过可变字典进行配置项的加载23     NSMutableDictionary *setAudioDic = [[NSMutableDictionary alloc] init];24     25     //设置录音格式(aac格式)26     [setAudioDic setValue:@(kAudioFormatMPEG4AAC) forKey:AVFormatIDKey];27     28     //设置录音采样率(Hz) 如：AVSampleRateKey==8000/44100/96000（影响音频的质量）29     [setAudioDic setValue:@(44100) forKey:AVSampleRateKey];30     31     //设置录音通道数1 Or 232     [setAudioDic setValue:@(1) forKey:AVNumberOfChannelsKey];33     34     //线性采样位数  8、16、24、3235     [setAudioDic setValue:@16 forKey:AVLinearPCMBitDepthKey];36     //录音的质量37     [setAudioDic setValue:@(AVAudioQualityHigh) forKey:AVEncoderAudioQualityKey];38     39     NSString *strUrl = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];40     41     NSString *fileName = [NSString stringWithFormat:@"%ld", (long)[[NSDate date] timeIntervalSince1970]];42     43     44     NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/%@.aac", strUrl, fileName]];45     _audioPlayURL = url;46     47     NSError *error;48     //初始化49     self.audioRecorder = [[AVAudioRecorder alloc]initWithURL:url settings:setAudioDic error:&error];50     //开启音量检测51     self.audioRecorder.meteringEnabled = YES;52     self.audioRecorder.delegate = self;53 54 }

　　　　

6.添加键盘回收键Done

1 //给键盘添加done键 2 -(void) addDone 3 { 4     //TextView的键盘定制回收按钮 5      UIToolbar * toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 30)]; 6   7    UIBarButtonItem * item1 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(tapDone:)]; 8     UIBarButtonItem * item2 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil]; 9       UIBarButtonItem * item3 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];10     toolBar.items = @[item2,item1,item3];11     12      self.sendTextView.inputAccessoryView =toolBar;13 }

　　　　

　　

三.编写控件的回调方法

控件添加好以后下面要添加触发控件要干的事情：

1.从最复杂的开始，长按发送录音的按钮时，会录音。松开收时会发送（在发送时要判断音频的时间，太小不允许发送）。录音时上滑取消录音（删除录音文件）。主要是给录音按钮加了一个LongPress手势，根据手势的状态来做不同的事情。关于手势的内容请参考之前的博客：（），下面是录音业务逻辑的实现(个人在Coding的时候，感觉这一块是工具条中最复杂的部分)，代码如下：　　

1 //长按手势触发的方法 2 -(void)sendVoiceButtonLongPress:(id)sender 3 { 4     static int i = 1; 5     if ([sender isKindOfClass:[UILongPressGestureRecognizer class]]) { 6          7         UILongPressGestureRecognizer * longPress = sender; 8          9         //录音开始10         if (longPress.state == UIGestureRecognizerStateBegan)11         {12             13             i = 1;14             15             [self.sendVoiceButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal];16             //录音初始化17             [self audioInit];18             19             //创建录音文件，准备录音20             if ([self.audioRecorder prepareToRecord])21             {22                 //开始23                 [self.audioRecorder record];24                 25                 //设置定时检测音量变化26                 _timer = [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(detectionVoice) userInfo:nil repeats:YES];27             }28         }29         30         31         //取消录音32         if (longPress.state == UIGestureRecognizerStateChanged)33         {34             35             CGPoint piont = [longPress locationInView:self];36             NSLog(@"%f",piont.y);37 38             if (piont.y < -20)39             {40                 if (i == 1) {41                     42                     [self.sendVoiceButton setBackgroundImage:[UIImage imageNamed:@"chat_bottom_textfield.png"] forState:UIControlStateNormal];43                     [self.sendVoiceButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];44                     //删除录制文件45                     [self.audioRecorder deleteRecording];46                     [self.audioRecorder stop];47                     [_timer invalidate];48                     49                     UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"录音取消" delegate:nil cancelButtonTitle:@"取消" otherButtonTitles: nil];50                     [alter show];51                     //去除图片用的52                     self.cancelBlock(1);53                     i = 0;54                     55                 }56 57                 58             }59          }60         61         if (longPress.state == UIGestureRecognizerStateEnded) {62             if (i == 1)63             {64                 NSLog(@"录音结束");65                 [self.sendVoiceButton setBackgroundImage:[UIImage imageNamed:@"chat_bottom_textfield.png"] forState:UIControlStateNormal];66                 [self.sendVoiceButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];67                 68                 double cTime = self.audioRecorder.currentTime;69                 if (cTime > 1)70                 {71                     //如果录制时间<2 不发送72                     NSLog(@"发出去");73                     self.urlBlock(self.audioPlayURL);74                 }75                 else76                 {77                     //删除记录的文件78                     [self.audioRecorder deleteRecording];79                     UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"录音时间太短！" delegate:nil cancelButtonTitle:@"取消" otherButtonTitles: nil];80                     [alter show];81                     self.cancelBlock(1);82                     83                 }84                 [self.audioRecorder stop];85                 [_timer invalidate];86             }87         }88         89         90     }91     92 }

　　　　

2.下面的代码是检测音量的变化，用于根据音量变化图片，代码如下：

1 //录音的音量探测 2 - (void)detectionVoice 3 { 4     [self.audioRecorder updateMeters];//刷新音量数据 5     //获取音量的平均值  [recorder averagePowerForChannel:0]; 6     //音量的最大值  [recorder peakPowerForChannel:0]; 7      8     CGFloat lowPassResults = pow(10, (0.05 * [self.audioRecorder peakPowerForChannel:0])); 9     10     //把声音的音量传给调用者11     self.volumeBlock(lowPassResults);12 }

　　　　

3.轻击输入框时，切换到系统键盘，代码如下：

1 //轻击sendText切换键盘 2 -(void)tapGesture:(UITapGestureRecognizer *) sender 3 { 4     if ([self.sendTextView.inputView isEqual:self.functionView]) 5     { 6         self.sendTextView.inputView = nil; 7          8         [self.changeKeyBoardButton setImage:[UIImage imageNamed:@"chat_bottom_smile_nor.png"] forState:UIControlStateNormal]; 9         10         [self.sendTextView reloadInputViews];11     }12     13     if (![self.sendTextView isFirstResponder])14     {15         [self.sendTextView becomeFirstResponder];16     }17 }

　　　　

4.通过输入框的文字多少改变toolView的高度，因为输入框的约束是加在ToolView上的，所以需要把输入框的ContentSize通过block传到ToolView的调用者上，让ToolView的父视图来改变ToolView的高度，从而sendTextView的高度也会随着改变的，下面的代码是把ContentSize交给父视图：代码如下：

1 //通过文字的多少改变toolView的高度2 -(void)textViewDidChange:(UITextView *)textView3 {4     CGSize contentSize = self.sendTextView.contentSize;5     6     self.sizeBlock(contentSize);7 }

　　　　

效果如下，文字多时TextView的高度也会增大：

　　

 

5.点击最左边的按钮触发的事件（切换文本输入框和录音按钮），代码如下：

1 //切换声音按键和文字输入框 2 -(void)tapVoiceChangeButton:(UIButton *) sender 3 { 4  5     if (self.sendVoiceButton.hidden == YES) 6     { 7         self.sendTextView.hidden = YES; 8         self.sendVoiceButton.hidden = NO; 9         [self.voiceChangeButton setImage:[UIImage imageNamed:@"chat_bottom_keyboard_nor.png"] forState:UIControlStateNormal];10         11         if ([self.sendTextView isFirstResponder]) {12             [self.sendTextView resignFirstResponder];13         }14     }15     else16     {17         self.sendTextView.hidden = NO;18         self.sendVoiceButton.hidden = YES;19         [self.voiceChangeButton setImage:[UIImage imageNamed:@"chat_bottom_voice_press.png"] forState:UIControlStateNormal];20         21         if (![self.sendTextView isFirstResponder]) {22             [self.sendTextView becomeFirstResponder];23         }24     }25 }

　　　　

6.点击return发送文字（通过Block回调传入到父视图上），代码如下：

1 //发送信息（点击return） 2 - (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text 3 { 4     if ([text isEqualToString:@"\n"]) 5     { 6          7         //通过block回调把text的值传递到Controller中共 8         self.textBlock(self.sendTextView.text); 9         10         self.sendTextView.text = @"";11         12         return NO;13     }14     return YES;15 }

　　　　

7.录音按钮本身要做的事情（在LongPress没有被触发时调用）代码如下：

1 //发送声音按钮回调的方法2 -(void)tapSendVoiceButton:(UIButton *) sender3 {4     NSLog(@"sendVoiceButton");5     //点击发送按钮没有触发长按手势要做的事儿6     UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"按住录音" delegate:nil cancelButtonTitle:@"取消" otherButtonTitles: nil];7     [alter show];8 }

　　　　

8.调用表情键盘：

1 //变成表情键盘 2 -(void)tapChangeKeyBoardButton:(UIButton *) sender 3 { 4     if ([self.sendTextView.inputView isEqual:self.functionView]) 5     { 6         self.sendTextView.inputView = nil; 7          8         [self.changeKeyBoardButton setImage:[UIImage imageNamed:@"chat_bottom_smile_nor.png"] forState:UIControlStateNormal]; 9         10         [self.sendTextView reloadInputViews];11     }12     else13     {14         self.sendTextView.inputView = self.functionView;15        16         17         [self.changeKeyBoardButton setImage:[UIImage imageNamed:@"chat_bottom_keyboard_nor.png"] forState:UIControlStateNormal];18         19         [self.sendTextView reloadInputViews];20     }21     22     if (![self.sendTextView isFirstResponder])23     {24         [self.sendTextView becomeFirstResponder];25     }26     27     if (self.sendTextView.hidden == YES) {28         self.sendTextView.hidden = NO;29         self.sendVoiceButton.hidden = YES;30         [self.voiceChangeButton setImage:[UIImage imageNamed:@"chat_bottom_voice_press.png"] forState:UIControlStateNormal];31         32     }33 34 }

 

以上就是ToolView的所有封装代码，至于在Controller中如何使用他来发送消息，如何定义聊天Cell,如何处理录音文件，聊天时的气泡是如何实现的等功能，在以后的博客中会继续讲解，希望大家继续关注。（转载请注明出处）

 Demo地址：