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 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 |
#import "TextCell.h" @interface TextCell() @property (strong, nonatomic) IBOutlet UIImageView *headImageView; @property (strong, nonatomic) IBOutlet UIImageView *chatBgImageView; @property (strong, nonatomic) IBOutlet UITextView *chatTextView; @property (strong, nonatomic) IBOutlet NSLayoutConstraint *chatBgImageWidthConstraint; @property (strong, nonatomic) IBOutlet NSLayoutConstraint *chatTextWidthConstaint; @property (strong, nonatomic) NSMutableAttributedString *attrString; @end @implementation TextCell -(void)setCellValue:(NSMutableAttributedString *)str { //移除约束 [self removeConstraint:_chatBgImageWidthConstraint]; [self removeConstraint:_chatTextWidthConstaint]; self.attrString = str; NSLog(@"%@",self.attrString); //由text计算出text的宽高 CGRect bound = [self.attrString boundingRectWithSize:CGSizeMake(150, 1000) options:NSStringDrawingUsesLineFragmentOrigin context:nil]; //根据text的宽高来重新设置新的约束 //背景的宽 NSString *widthImageString; NSArray *tempArray; widthImageString = [NSString stringWithFormat:@"H:[_chatBgImageView(%f)]", bound.size.width+45]; tempArray = [NSLayoutConstraint constraintsWithVisualFormat:widthImageString options:0 metrics:0 views:NSDictionaryOfVariableBindings(_chatBgImageView)]; _chatBgImageWidthConstraint = tempArray[0]; [self addConstraint:self.chatBgImageWidthConstraint]; widthImageString = [NSString stringWithFormat:@"H:[_chatTextView(%f)]", bound.size.width+20]; tempArray = [NSLayoutConstraint constraintsWithVisualFormat:widthImageString options:0 metrics:0 views:NSDictionaryOfVariableBindings(_chatTextView)]; _chatBgImageWidthConstraint = tempArray[0]; [self addConstraint:self.chatBgImageWidthConstraint]; //设置图片 UIImage *image = [UIImage imageNamed:@"chatfrom_bg_normal.png"]; image = [image resizableImageWithCapInsets:(UIEdgeInsetsMake(image.size.height * 0.6, image.size.width * 0.4, image.size.height * 0.3, image.size.width * 0.4))]; //image = [image stretchableImageWithLeftCapWidth:image.size.width * 0.5 topCapHeight:image.size.height * 0.5]; [self.chatBgImageView setImage:image]; self.chatTextView.attributedText = str; } @end |
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 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 |
#import "MyImageCell.h" @interface MyImageCell() @property (strong, nonatomic) IBOutlet UIImageView *bgImageView; @property (strong, nonatomic) IBOutlet UIButton *imageButton; @property (strong, nonatomic) ButtonImageBlock imageBlock; @property (strong, nonatomic) UIImage *buttonImage; @end @implementation MyImageCell -(void)setCellValue:(UIImage *)sendImage { self.buttonImage = sendImage; UIImage *image = [UIImage imageNamed:@"chatto_bg_normal.png"]; image = [image resizableImageWithCapInsets:(UIEdgeInsetsMake(image.size.height * 0.6, image.size.width * 0.4, image.size.height * 0.3, image.size.width * 0.4))]; [self.bgImageView setImage:image]; [self.imageButton setImage:sendImage forState:UIControlStateNormal]; } -(void)setButtonImageBlock:(ButtonImageBlock)block { self.imageBlock = block; } - (IBAction)tapImageButton:(id)sender { self.imageBlock(self.buttonImage); } @end |
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 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 |
#import "VoiceCellTableViewCell.h" @interface VoiceCellTableViewCell() @property (strong, nonatomic) NSURL *playURL; @property (strong, nonatomic) AVAudioPlayer *audioPlayer; @end @implementation VoiceCellTableViewCell -(void)setCellValue:(NSDictionary *)dic { _playURL = dic[@"body"][@"content"]; } - (IBAction)tapVoiceButton:(id)sender { NSError *error = nil; AVAudioPlayer *player = [[AVAudioPlayer alloc]initWithContentsOfURL:_playURL error:&error]; if (error) { NSLog(@"播放错误:%@",[error description]); } self.audioPlayer = player; [self.audioPlayer play]; } @end |
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 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 |