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iOS开发之微信聊天页面实现

  在上篇博客iOS开发之微信聊天工具栏的封装中对微信聊天页面下方的工具栏进行了封装,本篇博客中就使用之前封装的工具栏来进行聊天页面的编写。在聊天页面中主要用到了TableView的知识,还有如何在俩天中显示我们发送的表情,具体请参考之前的博客:IOS开发之显示微博表情,在这儿就不做赘述啦。在聊天页面用到了三对,六种Cell,不过cell的复杂度要比之前的新浪微博(IOS开发之新浪围脖)简单的多。废话少说吧,还是先来几张效果图,在给出实现代码吧。

  聊天界面的效果图如下:在下面的聊天界面中中用到了3类cell,一类是显示文字和表情的,一类是显示录音的,一类是显示图片的。当点击图片时会跳转到另一个Controller中来进行图片显示,在图片显示页面中添加了一个捏合的手势(关于手势,请参考:iOS开发之手势识别)。点击播放按钮,会播放录制的音频,cell的大学会根据内容的多少来调整,而cell中textView的高度是通过约束来设置的。

  一,定义我们要用的cell,代码如下:

    1,显示表情和text的cell,代码如下,需要根据NSMutableAttributedString求出bound,然后改变cell上的ImageView和TextView的宽度的约束值,动态的调整气泡的大小,具体代码如下:

 1 #import "TextCell.h" 2  3 @interface TextCell() 4  5 @property (strong, nonatomic) IBOutlet UIImageView *headImageView; 6 @property (strong, nonatomic) IBOutlet UIImageView *chatBgImageView; 7 @property (strong, nonatomic) IBOutlet UITextView *chatTextView; 8 @property (strong, nonatomic) IBOutlet NSLayoutConstraint *chatBgImageWidthConstraint; 9 @property (strong, nonatomic) IBOutlet NSLayoutConstraint *chatTextWidthConstaint;10 @property (strong, nonatomic) NSMutableAttributedString *attrString;11 12 @end13 14 @implementation TextCell15 16 -(void)setCellValue:(NSMutableAttributedString *)str17 {18     //移除约束19     [self removeConstraint:_chatBgImageWidthConstraint];20     [self removeConstraint:_chatTextWidthConstaint];21     22     self.attrString = str;23     NSLog(@"%@",self.attrString);24     25     //由text计算出text的宽高26       CGRect bound = [self.attrString boundingRectWithSize:CGSizeMake(150, 1000) options:NSStringDrawingUsesLineFragmentOrigin context:nil];27    28     //根据text的宽高来重新设置新的约束29     //背景的宽30     NSString *widthImageString;31     NSArray *tempArray;32     33     widthImageString = [NSString stringWithFormat:@"H:[_chatBgImageView(%f)]", bound.size.width+45];34     tempArray = [NSLayoutConstraint constraintsWithVisualFormat:widthImageString options:0 metrics:0 views:NSDictionaryOfVariableBindings(_chatBgImageView)];35     _chatBgImageWidthConstraint = tempArray[0];36     [self addConstraint:self.chatBgImageWidthConstraint];37     38     widthImageString = [NSString stringWithFormat:@"H:[_chatTextView(%f)]", bound.size.width+20];39     tempArray = [NSLayoutConstraint constraintsWithVisualFormat:widthImageString options:0 metrics:0 views:NSDictionaryOfVariableBindings(_chatTextView)];40     _chatBgImageWidthConstraint = tempArray[0];41     [self addConstraint:self.chatBgImageWidthConstraint];42     43     //设置图片44     UIImage *image = [UIImage imageNamed:@"chatfrom_bg_normal.png"];45     image = [image resizableImageWithCapInsets:(UIEdgeInsetsMake(image.size.height * 0.6, image.size.width * 0.4, image.size.height * 0.3, image.size.width * 0.4))];46     47     //image = [image stretchableImageWithLeftCapWidth:image.size.width * 0.5 topCapHeight:image.size.height * 0.5];48     49     50     51     [self.chatBgImageView setImage:image];52     53     self.chatTextView.attributedText = str;54     55     56 }57 58 @end
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    2.显示图片的cell,通过block回调把图片传到Controller中,用于放大图片使用。

 1 #import "MyImageCell.h" 2  3 @interface MyImageCell() 4 @property (strong, nonatomic) IBOutlet UIImageView *bgImageView; 5 @property (strong, nonatomic) IBOutlet UIButton *imageButton; 6 @property (strong, nonatomic) ButtonImageBlock imageBlock; 7 @property (strong, nonatomic) UIImage *buttonImage; 8  9 @end10 11 @implementation MyImageCell12 13 -(void)setCellValue:(UIImage *)sendImage14 {15     self.buttonImage = sendImage;16     UIImage *image = [UIImage imageNamed:@"chatto_bg_normal.png"];17     image = [image resizableImageWithCapInsets:(UIEdgeInsetsMake(image.size.height * 0.6, image.size.width * 0.4, image.size.height * 0.3, image.size.width * 0.4))];18     [self.bgImageView setImage:image];19     [self.imageButton setImage:sendImage forState:UIControlStateNormal];20 21 }22 23 -(void)setButtonImageBlock:(ButtonImageBlock)block24 {25     self.imageBlock = block;26 }27 28 - (IBAction)tapImageButton:(id)sender {29     self.imageBlock(self.buttonImage);30 }31 32 @end
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    3.显示录音的cell,点击cell上的button,播放对应的录音,代码如下:

 1 #import "VoiceCellTableViewCell.h" 2  3 @interface VoiceCellTableViewCell() 4  5 @property (strong, nonatomic) NSURL *playURL; 6 @property (strong, nonatomic) AVAudioPlayer *audioPlayer; 7  8 @end 9 10 @implementation VoiceCellTableViewCell11 12 -(void)setCellValue:(NSDictionary *)dic13 {14     _playURL = dic[@"body"][@"content"];15 }16 17 - (IBAction)tapVoiceButton:(id)sender {18     19     20     NSError *error = nil;21     AVAudioPlayer *player = [[AVAudioPlayer alloc]initWithContentsOfURL:_playURL error:&error];22     if (error) {23         NSLog(@"播放错误:%@",[error description]);24     }25     self.audioPlayer = player;26     [self.audioPlayer play];27 }28 @end
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  二,cell搞定后要实现我们的ChatController部分    

    1.ChatController.m中的延展和枚举代码如下:

 1 //枚举Cell类型 2 typedef enum : NSUInteger { 3     SendText, 4     SendVoice, 5     SendImage 6 } MySendContentType; 7  8  9 //枚举用户类型10 typedef enum : NSUInteger {11     MySelf,12     MyFriend13 } UserType;14 15 @interface ChatViewController ()16 17 //工具栏18 @property (nonatomic,strong) ToolView *toolView;19 20 //音量图片21 @property (strong, nonatomic) UIImageView *volumeImageView;22 23 //工具栏的高约束,用于当输入文字过多时改变工具栏的约束24 @property (strong, nonatomic) NSLayoutConstraint *tooViewConstraintHeight;25 26 //存放所有的cell中的内容27 @property (strong, nonatomic) NSMutableArray *dataSource;28 29 //storyBoard上的控件30 @property (strong, nonatomic) IBOutlet UITableView *myTableView;31 32 //用户类型33 @property (assign, nonatomic) UserType userType;34 35 //从相册获取图片36 @property (strong, nonatomic) UIImagePickerController *imagePiceker;37 38 @end
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    2.实现工具栏中的回调的代码如下,通过Block,工具栏和ViewController交互,具体ToolView的Block实现,请参考上一篇博客(iOS开发之微信聊天工具栏的封装),聊天工具栏使用代码如下:

 1 //实现工具栏的回调 2 -(void)setToolViewBlock 3 { 4     __weak __block ChatViewController *copy_self = self; 5     //通过block回调接收到toolView中的text 6     [self.toolView setMyTextBlock:^(NSString *myText) { 7         NSLog(@"%@",myText); 8          9         [copy_self sendMessage:SendText Content:myText];10     }];11     12     13     //回调输入框的contentSize,改变工具栏的高度14     [self.toolView setContentSizeBlock:^(CGSize contentSize) {15          [copy_self updateHeight:contentSize];16     }];17     18     19     //获取录音声量,用于声音音量的提示20     [self.toolView setAudioVolumeBlock:^(CGFloat volume) {21         22         copy_self.volumeImageView.hidden = NO;23         int index = (int)(volume*100)%6+1;24         [copy_self.volumeImageView setImage:[UIImage imageNamed:[NSString stringWithFormat:@"record_animate_%02d.png",index]]];25     }];26     27     //获取录音地址(用于录音播放方法)28     [self.toolView setAudioURLBlock:^(NSURL *audioURL) {29         copy_self.volumeImageView.hidden = YES;30         31         [copy_self sendMessage:SendVoice Content:audioURL];32     }];33     34     //录音取消(录音取消后,把音量图片进行隐藏)35     [self.toolView setCancelRecordBlock:^(int flag) {36         if (flag == 1) {37             copy_self.volumeImageView.hidden = YES;38         }39     }];40     41     42     //扩展功能回调43     [self.toolView setExtendFunctionBlock:^(int buttonTag) {44         switch (buttonTag) {45             case 1:46                 //从相册获取47                 [copy_self presentViewController:copy_self.imagePiceker animated:YES completion:^{48                     49                 }];50                 break;51             case 2:52                 //拍照53                 break;54                 55             default:56                 break;57         }58     }];59 }
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    3.把聊天工具栏中返回的内容显示在tableView中,代码如下:

 1 //发送消息 2 -(void)sendMessage:(MySendContentType) sendType Content:(id)content 3 { 4      5     //把收到的url封装成字典 6     UserType userType = self.userType; 7      8     NSMutableDictionary *tempDic = [[NSMutableDictionary alloc] initWithCapacity:2]; 9     [tempDic setValue:@(userType) forKey:@"userType"];10     11     NSDictionary *bodyDic = @{@"type":@(sendType),12                               @"content":content};13     [tempDic setValue:bodyDic forKey:@"body"];14     [self.dataSource addObject:tempDic];15     16     //重载tableView17     [self.myTableView  reloadData];18     19     NSIndexPath *indexPath = [NSIndexPath indexPathForRow:self.dataSource.count-1 inSection:0];20     21     [self.myTableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];22     23  24 }
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    4.根据ToolView中回调接口,获取工具栏中textView的ContentSize,通过ContentSize来调整ToolView的高度约束,代码如下:

 1 //更新toolView的高度约束 2 -(void)updateHeight:(CGSize)contentSize 3 { 4     float height = contentSize.height + 18; 5     if (height <= 80) { 6         [self.view removeConstraint:self.tooViewConstraintHeight]; 7          8         NSString *string = [NSString stringWithFormat:@"V:[_toolView(%f)]", height]; 9         10         NSArray * tooViewConstraintV = [NSLayoutConstraint constraintsWithVisualFormat:string options:0 metrics:0 views:NSDictionaryOfVariableBindings(_toolView)];11         self.tooViewConstraintHeight = tooViewConstraintV[0];12         [self.view addConstraint:self.tooViewConstraintHeight];13     }14 }
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    5.从本地获取图片,并显示在相应的Cell上,代码如下:

 1 //获取图片后要做的方法 2 -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 3 { 4     UIImage *pickerImage = info[UIImagePickerControllerEditedImage]; 5      6     //发送图片 7     [self sendMessage:SendImage Content:pickerImage]; 8      9     [self dismissViewControllerAnimated:YES completion:^{}];10     11 }12 13 -(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker14 {15     //在ImagePickerView中点击取消时回到原来的界面16     [self dismissViewControllerAnimated:YES completion:^{}];17 }
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    6.把NSString 转换成NSMutableAttributeString,用于显示表情,代码如下:

 1 //显示表情,用属性字符串显示表情 2 -(NSMutableAttributedString *)showFace:(NSString *)str 3 { 4     //加载plist文件中的数据 5     NSBundle *bundle = [NSBundle mainBundle]; 6     //寻找资源的路径 7     NSString *path = [bundle pathForResource:@"emoticons" ofType:@"plist"]; 8     //获取plist中的数据 9     NSArray *face = [[NSArray alloc] initWithContentsOfFile:path];10     11     //创建一个可变的属性字符串12     13     NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithString:str];14     15     UIFont *baseFont = [UIFont systemFontOfSize:17];16     [attributeString addAttribute:NSFontAttributeName value:baseFont17                        range:NSMakeRange(0, str.length)];18     19     //正则匹配要替换的文字的范围20     //正则表达式21     NSString * pattern = @"\\[[a-zA-Z0-9\\u4e00-\\u9fa5]+\\]";22     NSError *error = nil;23     NSRegularExpression * re = [NSRegularExpression regularExpressionWithPattern:pattern options:NSRegularExpressionCaseInsensitive error:&error];24     25     if (!re) {26         NSLog(@"%@", [error localizedDescription]);27     }28     29     //通过正则表达式来匹配字符串30     NSArray *resultArray = [re matchesInString:str options:0 range:NSMakeRange(0, str.length)];31     32     33     //用来存放字典,字典中存储的是图片和图片对应的位置34     NSMutableArray *imageArray = [NSMutableArray arrayWithCapacity:resultArray.count];35     36     //根据匹配范围来用图片进行相应的替换37     for(NSTextCheckingResult *match in resultArray) {38         //获取数组元素中得到range39         NSRange range = [match range];40         41         //获取原字符串中对应的值42         NSString *subStr = [str substringWithRange:range];43         44         for (int i = 0; i < face.count; i ++)45         {46             if ([face[i][@"chs"] isEqualToString:subStr])47             {48                 49                 //face[i][@"gif"]就是我们要加载的图片50                 //新建文字附件来存放我们的图片51                 NSTextAttachment *textAttachment = [[NSTextAttachment alloc] init];52                 53                 //给附件添加图片54                 textAttachment.image = [UIImage imageNamed:face[i][@"png"]];55                 56                 //把附件转换成可变字符串,用于替换掉源字符串中的表情文字57                 NSAttributedString *imageStr = [NSAttributedString attributedStringWithAttachment:textAttachment];58                 59                 //把图片和图片对应的位置存入字典中60                 NSMutableDictionary *imageDic = [NSMutableDictionary dictionaryWithCapacity:2];61                 [imageDic setObject:imageStr forKey:@"image"];62                 [imageDic setObject:[NSValue valueWithRange:range] forKey:@"range"];63                 64                 //把字典存入数组中65                 [imageArray addObject:imageDic];66                 67             }68         }69     }70     71     //从后往前替换72     for (int i = imageArray.count -1; i >= 0; i--)73     {74         NSRange range;75         [imageArray[i][@"range"] getValue:&range];76         //进行替换77         [attributeString replaceCharactersInRange:range withAttributedString:imageArray[i][@"image"]];78         79     }80     81     return  attributeString;82 }
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    7.根据Cell显示内容来调整Cell的高度,代码如下:

 1 //调整cell的高度 2 -(float)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 3 { 4      5     //根据文字计算cell的高度 6     if ([self.dataSource[indexPath.row][@"body"][@"type"] isEqualToNumber:@(SendText)]) { 7         NSMutableAttributedString *contentText = [self showFace:self.dataSource[indexPath.row][@"body"][@"content"]]; 8          9         CGRect textBound = [contentText boundingRectWithSize:CGSizeMake(150, 1000) options:NSStringDrawingUsesLineFragmentOrigin context:nil];10         11         float height = textBound.size.height + 40;12         return height;13     }14     if ([self.dataSource[indexPath.row][@"body"][@"type"] isEqualToNumber:@(SendVoice)])15     {16         return 73;17     }18     19     if ([self.dataSource[indexPath.row][@"body"][@"type"] isEqualToNumber:@(SendImage)])20     {21         return 125;22     }23     24     return 100;25  }
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    8.根据cell内容和用户类型,来选择Cell,代码如下:

 1 //设置cell 2 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 3 { 4     //根据类型选cell 5     MySendContentType contentType = [self.dataSource[indexPath.row][@"body"][@"type"] integerValue]; 6      7      8     if ([self.dataSource[indexPath.row][@"userType"]  isEqual: @(MyFriend)]) { 9         switch (contentType) {10             case SendText:11             {12                 TextCell *cell = [tableView dequeueReusableCellWithIdentifier:@"textCell" forIndexPath:indexPath];13                 NSMutableAttributedString *contentText = [self showFace:self.dataSource[indexPath.row][@"body"][@"content"]];14                 [cell setCellValue:contentText];15                 return cell;16             }17                 break;18                 19             case SendImage:20             {21                 heImageCell *cell = [tableView dequeueReusableCellWithIdentifier:@"heImageCell" forIndexPath:indexPath];22                 [cell setCellValue:self.dataSource[indexPath.row][@"body"][@"content"]];23                 24                 25                 __weak __block ChatViewController *copy_self = self;26                 27                 //传出cell中的图片28                 [cell setButtonImageBlock:^(UIImage *image) {29                     [copy_self displaySendImage:image];30                 }];31                 return cell;32             }33                 break;34                 35             case SendVoice:36             {37                 VoiceCellTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"heVoiceCell" forIndexPath:indexPath];38                 [cell setCellValue:self.dataSource[indexPath.row]];39                 return cell;40             }41 42                 break;43                 44             default:45                 break;46         }47 48     }49         50 51     if ([self.dataSource[indexPath.row][@"userType"]  isEqual: @(MySelf)]) {52     53         switch (contentType) {54             case SendText:55             {56                 TextCell *cell = [tableView dequeueReusableCellWithIdentifier:@"myselfTextCell" forIndexPath:indexPath];57                 NSMutableAttributedString *contentText = [self showFace:self.dataSource[indexPath.row][@"body"][@"content"]];58                 [cell setCellValue:contentText];59                 return cell;60             }61             break;62             63             case SendImage:64             {65                 MyImageCell *cell = [tableView dequeueReusableCellWithIdentifier:@"myImageCell" forIndexPath:indexPath];66                 [cell setCellValue:self.dataSource[indexPath.row][@"body"][@"content"]];67                 68                 __weak __block ChatViewController *copy_self = self;69                 70                 //传出cell中的图片71                 [cell setButtonImageBlock:^(UIImage *image) {72                     [copy_self displaySendImage:image];73                 }];74 75                 76                 return cell;77             }78                 break;79             80             case SendVoice:81             {82                 VoiceCellTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"myVoiceCell" forIndexPath:indexPath];83                 [cell setCellValue:self.dataSource[indexPath.row]];84                 return cell;85             }86 87                 break;88                 89             default:90                 break;91         }92     }93     UITableViewCell *cell;94     return cell;95 }
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    9.点击发送的图片来放大图片代码如下:

 1 //发送图片的放大 2 -(void) displaySendImage : (UIImage *)image 3 { 4     //把照片传到放大的controller中 5     UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]]; 6      7     ImageViewController *imageController = [storyboard instantiateViewControllerWithIdentifier:@"imageController"]; 8     [imageController setValue:image forKeyPath:@"image"]; 9     10    [self.navigationController pushViewController:imageController animated:YES];11     12 13 }
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    10.根据键盘的高度来调整ToolView的位置,代码如下:

 1 //键盘出来的时候调整tooView的位置 2 -(void) keyChange:(NSNotification *) notify 3 { 4     NSDictionary *dic = notify.userInfo; 5      6      7     CGRect endKey = [dic[@"UIKeyboardFrameEndUserInfoKey"] CGRectValue]; 8     //坐标系的转换 9     CGRect endKeySwap = [self.view convertRect:endKey fromView:self.view.window];10     //运动时间11     [UIView animateWithDuration:[dic[UIKeyboardAnimationDurationUserInfoKey] floatValue] animations:^{12         13         [UIView setAnimationCurve:[dic[UIKeyboardAnimationCurveUserInfoKey] doubleValue]];14         CGRect frame = self.view.frame;15         16         frame.size.height = endKeySwap.origin.y;17         18         self.view.frame = frame;19         [self.view layoutIfNeeded];20     }];21 }
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  三,代码有点多,不过在关键的部分都加有注释,在图片显示View中通过捏合手势来调整图片的大小,代码如下:

 1 - (IBAction)tapPichGesture:(id)sender { 2     UIPinchGestureRecognizer *gesture = sender; 3      4     //手势改变时 5     if (gesture.state == UIGestureRecognizerStateChanged) 6     { 7          8         //捏合手势中scale属性记录的缩放比例 9         self.myImageView.transform = CGAffineTransformMakeScale(gesture.scale, gesture.scale);10     }11     12 }
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  上面的东西是在本地做的测试,没有加上XMPP即时通讯协议,以后的博客会通过服务器转发来进行聊天,并且会继续对微信进行完善,感兴趣的小伙伴继续关注吧。转载请注明出处。

iOS开发之微信聊天页面实现