源码-0205-02--聊天布局02
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// XMGChatingViewController.m // 07-聊天布局 #import "XMGChatingViewController.h" #import "XMGMessage.h" #import "XMGMessageCell.h" @interface XMGChatingViewController () <UITableViewDataSource, UITableViewDelegate> @property (nonatomic, strong) NSArray *messages; @end @implementation XMGChatingViewController - (NSArray *)messages { if (_messages == nil) { // 加载plist中的字典数组 NSString *path = [[NSBundle mainBundle] pathForResource:@"messages.plist" ofType:nil]; NSArray *dictArray = [NSArray arrayWithContentsOfFile:path]; // 字典数组 -> 模型数组 NSMutableArray *messageArray = [NSMutableArray array]; // 用来记录上一条消息模型 XMGMessage *lastMessage = nil; for (NSDictionary *dict in dictArray) { XMGMessage *message = [XMGMessage messageWithDict:dict]; message.hideTime = [message.time isEqualToString:lastMessage.time]; [messageArray addObject:message]; lastMessage = message; } _messages = messageArray; } return _messages; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } #pragma mark - <UITableViewDataSource> - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return self.messages.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { XMGMessageCell *cell = [tableView dequeueReusableCellWithIdentifier:@"message"]; cell.message = self.messages[indexPath.row]; return cell; } #pragma mark - <UITableViewDelegate> - (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath { return 200; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { XMGMessage *message = self.messages[indexPath.row]; return message.cellHeight; } @end
// XMGMessage.h // 07-聊天布局 #import <UIKit/UIKit.h> typedef enum { XMGMessageTypeMe = 0, XMGMessageTypeOther = 1 } XMGMessageType; @interface XMGMessage : NSObject @property (nonatomic, strong) NSString *text; @property (nonatomic, strong) NSString *time; @property (nonatomic, assign) XMGMessageType type; /** cell的高度 */ @property (nonatomic, assign) CGFloat cellHeight; /** 是否隐藏时间 */ @property (nonatomic, assign, getter=isHideTime) BOOL hideTime; + (instancetype)messageWithDict:(NSDictionary *)dict; @end
// XMGMessage.m // 07-聊天布局 #import "XMGMessage.h" @implementation XMGMessage + (instancetype)messageWithDict:(NSDictionary *)dict { XMGMessage *message = [[self alloc] init]; [message setValuesForKeysWithDictionary:dict]; return message; } @end
// XMGMessageCell.h // 07-聊天布局 #import <UIKit/UIKit.h> @class XMGMessage; @interface XMGMessageCell : UITableViewCell @property (nonatomic, strong) XMGMessage *message; @end
// XMGMessageCell.m // 07-聊天布局 #import "XMGMessageCell.h" #import "XMGMessage.h" //define this constant if you want to use Masonry without the \'mas_\' prefix #define MAS_SHORTHAND //define this constant if you want to enable auto-boxing for default syntax #define MAS_SHORTHAND_GLOBALS #import "Masonry.h" @interface XMGMessageCell() @property (weak, nonatomic) IBOutlet UILabel *timeLabel; @property (weak, nonatomic) IBOutlet UIButton *textButton; @property (weak, nonatomic) IBOutlet UIImageView *iconView; @property (weak, nonatomic) IBOutlet UIButton *otherTextButton; @property (weak, nonatomic) IBOutlet UIImageView *otherIconView; @end @implementation XMGMessageCell - (void)awakeFromNib { self.textButton.titleLabel.numberOfLines = 0; self.otherTextButton.titleLabel.numberOfLines = 0; } - (void)setMessage:(XMGMessage *)message { _message = message; if (message.hideTime) { // 隐藏时间 self.timeLabel.hidden = YES; [self.timeLabel updateConstraints:^(MASConstraintMaker *make) { make.height.equalTo(0); }]; } else { // 显示时间 self.timeLabel.text = message.time; self.timeLabel.hidden = NO; [self.timeLabel updateConstraints:^(MASConstraintMaker *make) { make.height.equalTo(21); }]; } if (message.type == XMGMessageTypeMe) { // 右边 [self settingShowTextButton:self.textButton showIconView:self.iconView hideTextButton:self.otherTextButton hideIconView:self.otherIconView]; } else { // 左边 [self settingShowTextButton:self.otherTextButton showIconView:self.otherIconView hideTextButton:self.textButton hideIconView:self.iconView]; } } /** * 处理左右按钮、头像 */ - (void)settingShowTextButton:(UIButton *)showTextButton showIconView:(UIImageView *)showIconView hideTextButton:(UIButton *)hideTextButton hideIconView:(UIImageView *)hideIconView { hideTextButton.hidden = YES; hideIconView.hidden = YES; showTextButton.hidden = NO; showIconView.hidden = NO; // 设置按钮的文字 [showTextButton setTitle:self.message.text forState:UIControlStateNormal]; // 强制更新 [showTextButton layoutIfNeeded]; // 设置按钮的高度就是titleLabel的高度 [showTextButton updateConstraints:^(MASConstraintMaker *make) { CGFloat buttonH = showTextButton.titleLabel.frame.size.height; make.height.equalTo(buttonH); }]; // 强制更新 [showTextButton layoutIfNeeded]; // 计算当前cell的高度 CGFloat buttonMaxY = CGRectGetMaxY(showTextButton.frame); CGFloat iconMaxY = CGRectGetMaxY(showIconView.frame); self.message.cellHeight = MAX(buttonMaxY, iconMaxY) + 10; } @end
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