短视频APP源码中系统评论功能是如何实现的

短视频系统中评论功能的分量在短视频功能里可谓是举足轻重，下面简单介绍下，短视频系统中的评论功能的实现方式:
评论分为对视频的评论和对评论的回复两部分：
对于评论列表大家再熟悉不过了，就是一个tableview罢了，相信刚入门的技术也可以实现。技术的关键在于对评论的回复，我们使用了tableview的嵌套，即：在评论的cell中创建回复的tablview，使用代理功能来实现对数据和UI界面的精准控制，下面是实现的具体方式:

_contentL.attributedText = attstr;    if ([_model.replys intValue] > 0) {        CGFloat HHHH = 0.0;        for (NSDictionary *dic in _replyArray) {            detailmodel *model = [[detailmodel alloc]initWithDic:dic];            HHHH += model.rowH;        }        if ([_model.replys intValue] == 1) {            _tableHeight.constant = HHHH;            _replyTable.tableFooterView = nil;        }else{//            if (!_replyBottomView) {                NSLog(@"===%d",page);                _model.replayView = [[UIView alloc]initWith :CGRectMake(0, 0, 100, 20)];                _model.replayView.backgroundColor = CellRow_Cor;                //回复                UIButton * replyBtn = [UIButton buttonWithType:0];                replyBtn.backgroundColor = [UIColor clearColor];                replyBtn. Label.textAlignment = NSTextAlignmentLeft;                replyBtn. Label.font = [UIFont systemFontOfSize:12];                [replyBtn addTarget:self action:@selector(makeReply:) forControlEvents:UIControlEventTouchUpInside];                BOOL showNum = NO;                if (_model.replyList.count==1) {                    showNum = YES;                }                [self changeMoreShowText:showNum andBtn:replyBtn];                NSMutableAttributedString *attstr2 = [[NSMutableAttributedString alloc]initWithString:@"收起"];                [attstr2 addAttribute:NSForegroundColorAttributeName value:RGB_COLOR(@"#969696", 1) range:NSMakeRange(0, 2)];                NSTextAttachment *attach2 = [[NSTextAttachment alloc] init];                UIImage *image2 = [UIImage imageNamed:@"relpay_三角上.png"];                NSAttributedString *imageString2;                if (image2) {                    attach2.image = image2;                    attach2.bounds = CGRectMake(0, -4, 15, 15);                    imageString2 =   [NSAttributedString attributedStringWithAttachment:attach2];                    [attstr2 appendAttributedString:imageString2];                }                [replyBtn setAttributed :attstr2 forState:UIControlStateSelected];                [_model.replayView addSubview:replyBtn];                //记录按钮属性                _model.replyMoreBtn = replyBtn;                [replyBtn mas_makeConstraints:^(MASConstraintMaker *make) {                    make.top.bottom.equalTo(_model.replayView);                    make.left.equalTo(_model.replayView).offset(26);                }];                       if ((_model.replyList.count % 10 != 0                     && _model.replyList.count % 10 != 1                     && _model.replyList.count% 10 != 3)                     || ((_model.replyList.count+1)== [_model.replys intValue])                    ) {                    replyBtn.selected = YES;                }else{                    replyBtn.selected = NO;                }            _replyTable.tableFooterView = _model.replayView;            _tableHeight.constant = HHHH+20;        }    }else{        _tableHeight.constant = 0;        _replyTable.tableFooterView = nil;    }- (void)makeReply:(UIButton *)replyBtn{    if (replyBtn.selected) {        NSDictionary *dic = [_replyArray first ];        [_replyArray removeAll s];        [_replyArray add :[dic mutableCopy]];        _model.replyList = [_replyArray mutableCopy];//        [_replyTable reloadData];        replyBtn.selected = NO;        [self changeMoreShowText:YES andBtn:replyBtn];        [self.delegate reloadCurCell:_model andIndex:_curIndex andReplist:_replyArray needRefresh:YES];    }else{             if (_replyArray.count == 1) {            page = 1;        }else{            page ++;        }        [self requestData:NO andBtn:replyBtn];    }}-(void)changeMoreShowText:(BOOL)isFirstPage andBtn:(UIButton *)replyBtn{    NSString *tempStr;    if (isFirstPage) {        tempStr  = [NSString stringWithFormat:@"展开%d条回复",[_model.replys intValue]>=2?([_model.replys intValue]-1):(1)];    }else{        tempStr  = [NSString stringWithFormat:@"展开更多回复"];    }    NSMutableAttributedString *attstr = [[NSMutableAttributedString alloc]initWithString:tempStr];    [attstr addAttribute:NSForegroundColorAttributeName value:RGB_COLOR(@"#969696", 1) range:NSMakeRange(0, tempStr.length)];    NSTextAttachment *attach = [[NSTextAttachment alloc] init];    UIImage *image = [UIImage imageNamed:@"relpay_三角下.png"];    NSAttributedString *imageString;    if (image) {        attach.image = image;        attach.bounds = CGRectMake(0, -4, 15, 15);        imageString =   [NSAttributedString attributedStringWithAttachment:attach];        [attstr appendAttributedString:imageString];    }    [replyBtn setAttributed :attstr forState:0];}

看了上述短视频APP源码评论功能的方法介绍，大家是不是眼前一亮？是不是豁然开朗？关于更多短视频系统功能的介绍可以关注我们的账号，我们会持续更新关于短视频功能介绍。