tableview 高度适配内容(高度随着cell行数变化而动态变化)及(监听contentsize变化)

//评论布局
-(void)drawPingLunViewWithArr:(NSMutableArray *)arrData{
    self.pinTab = [[UITableView
alloc]initWithFrame:CGRectMake(0,
0, SCREEN_WIDTH,
SCREEN_WIDTH) style:UITableViewStylePlain];
    [self.contentView
addSubview:self.pinTab];
    [self.pinTab
mas_remakeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(self.szdz_view.mas_bottom).mas_offset(TEXT_EDGE_DISTANCE);
        make.left.right.mas_equalTo(self.contentView);
        make.height.mas_equalTo(200*arrData.count+60+40+260+40);
    }];
    [self.pinTab
layoutIfNeeded];
    self.pinTab.delegate =
self;
    self.pinTab.dataSource =
self;
    self.pinTab.scrollEnabled =
YES;
    self.pinTab.bounces =
NO;
    self.pinTab.estimatedRowHeight =
100;
    self.pinTab.rowHeight =
UITableViewAutomaticDimension;
    [self.pinTab
registerClass:[UITableViewCell
class] forCellReuseIdentifier:@"cell"];
    self.pinTab.separatorStyle =
UITableViewCellSeparatorStyleNone;
    //添加标题
    self.pinTab.tableHeaderView = [[UIView
alloc]init];
    [self.pinTab
registerClass:[PingLunXQTabCell
class] forCellReuseIdentifier:@"PingLunXQTabCell"];
    [self.pinTab
registerClass:[ShopXQXiangSiTabCell
class] forCellReuseIdentifier:@"ShopXQXiangSiTabCell"];
 
     //添加观察控件的contentSize变化
    [self.pinTab
addObserver:self
forKeyPath:@"contentSize"
options:0
context:NULL];

}

//监听contentSize变化改变约束
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    CGRect frame =
self.pinTab.frame;
    frame.size =
self.pinTab.contentSize;
    [self.pinTab
mas_remakeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(self.szdz_view.mas_bottom).mas_offset(TEXT_EDGE_DISTANCE);
        make.left.right.mas_equalTo(self.contentView);
        make.height.mas_equalTo(frame.size.height);
    }];
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    
    return 2;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    if (section==0) {
        return
2;
    } else {
        return
1;
    }
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    if (indexPath.section==0) {
        PingLunXQTabCell *cell = [tableView
dequeueReusableCellWithIdentifier:@"PingLunXQTabCell"];
        cell.selectionStyle =
UITableViewCellSelectionStyleNone;
        cell.vc =
self;
        cell.arrImgv = [@[@"2"]
mutableCopy];//控制图片显隐性
        return cell;
    }else{
        ShopXQXiangSiTabCell*cell = [tableView
dequeueReusableCellWithIdentifier:@"ShopXQXiangSiTabCell"];
        cell.selectionStyle =
UITableViewCellSelectionStyleNone;
        cell.vc =
self;
        return cell;
    }
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    [tableView deselectRowAtIndexPath:indexPath
animated:NO];
    
    
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    
    return
UITableViewAutomaticDimension;
}

//头高度
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
    
    return 60.f;
}
//尾高度
-(CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section{
    
    return 30.f;
}
//表头
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
    UIView *hv = [[UIView
alloc]initWithFrame:CGRectMake(0,
0, SCREEN_WIDTH,
60)];
    hv.backgroundColor = [UIColor
whiteColor];
    
    if (section==0) {
        self.pinLun_numL = [[UILabel
alloc]init];
        [hv addSubview:self.pinLun_numL];
        self.pinLun_numL.font =
MIDDLE_LIT_FONT;
        self.pinLun_numL.textColor =
TEXT_HEX_MID_GRAY;
        [self.pinLun_numL
mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.mas_equalTo(hv.mas_left).mas_offset(TEXT_EDGE_DISTANCE);
            make.centerY.mas_equalTo(hv.mas_centerY);
        }];
        self.pinLun_numL.text = [NSString
stringWithFormat:@"评论(%ld)",12];
        
        UIImageView *pl_imgv = [[UIImageView
alloc]init];
        pl_imgv.userInteractionEnabled =
YES;
        [hv addSubview:pl_imgv];
        pl_imgv.image = [UIImage
imageNamed:@"s_d_xiangyoujiantou"];
        [pl_imgv mas_makeConstraints:^(MASConstraintMaker *make) {
            make.right.mas_equalTo(hv).mas_offset(-TEXT_EDGE_DISTANCE);
            make.centerY.mas_equalTo(hv.mas_centerY);
            make.size.mas_equalTo(CGSizeMake(6,
10));
        }];
        
        self.pingLun_fenL = [[UILabel
alloc]init];
        [hv addSubview:self.pingLun_fenL];
        self.pingLun_fenL.font =
MIDDLE_LIT_FONT;
        [self.pingLun_fenL
mas_makeConstraints:^(MASConstraintMaker *make) {
            make.right.mas_equalTo(pl_imgv.mas_right).mas_offset(-TEXT_LINE_DISTANCE);
            make.centerY.mas_equalTo(hv.mas_centerY);
        }];
        self.pingLun_fenL.attributedText = [self
getAttriStringWithPingLunString:@"99%"];
        UITapGestureRecognizer *tap = [[UITapGestureRecognizer
alloc]initWithTarget:self
action:@selector(clickedPingLunXiangQing:)];
        [hv addGestureRecognizer:tap];
    } else {
        
        UILabel *lab_xs = [[UILabel
alloc]init];
        [hv addSubview:lab_xs];
        lab_xs.font =
MIDDLE_LIT_FONT;
        lab_xs.textColor =
TEXT_HEX_MID_GRAY;
        lab_xs.text =
@"相似商品";
        [lab_xs mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.mas_equalTo(hv.mas_centerX).mas_offset(TEXT_LINE_DISTANCE+24/2);
            make.bottom.mas_equalTo(hv.mas_bottom);
        }];
        UIImageView *xs_imgv = [[UIImageView
alloc]init];
        xs_imgv.userInteractionEnabled =
YES;
        [hv addSubview:xs_imgv];
        xs_imgv.image = [UIImage
imageNamed:@"s_d_xiangsi-biao"];
        [xs_imgv mas_makeConstraints:^(MASConstraintMaker *make) {
            make.right.mas_equalTo(lab_xs.mas_left).mas_offset(-TEXT_LINE_DISTANCE);
            make.centerY.mas_equalTo(lab_xs.mas_centerY);
            make.size.mas_equalTo(CGSizeMake(24,
24));
        }];
        

    }
    
    return hv;
}
//区尾
-(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section{
    
    UIView*view = [[UIView
alloc]initWithFrame:CGRectMake(0,
0, SCREEN_WIDTH,30)];
    view.backgroundColor = [UIColor
whiteColor];
    if (section==0) {
        UIButton *btn = [UIButton
buttonWithType:UIButtonTypeCustom];
        [view addSubview:btn];
        btn.titleLabel.font =
LITTLE_L_FONT;
        [btn setTitleColor:TEXT_HEX_LIGHT_L_GRAY
forState:UIControlStateNormal];
        btn.layer.cornerRadius =
20/2;
        btn.layer.borderColor =
TEXT_HEX_LIGHT_L_GRAY.CGColor;
        btn.layer.borderWidth =
1;
        [btn mas_makeConstraints:^(MASConstraintMaker *make) {
            make.center.mas_equalTo(view);
            make.size.mas_equalTo(CGSizeMake(106,
20));
        }];
        [btn setTitle:@"查看全部评论" forState:UIControlStateNormal];
        [btn addTarget:self
action:@selector(clickedChaKanPingLun:)
forControlEvents:UIControlEventTouchUpInside];
    } else {
        UILabel *lab_xs = [[UILabel
alloc]init];
        [view addSubview:lab_xs];
        lab_xs.font =
MIDDLE_LIT_FONT;
        lab_xs.textColor =
TEXT_HEX_LIGHT_L_GRAY;
        lab_xs.text =
@"上拉查看商品详情";
        [lab_xs mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.mas_equalTo(view.mas_centerX).mas_offset(TEXT_LINE_DISTANCE+16/2);
            make.centerY.mas_equalTo(view.mas_centerY);
        }];
        self.shanglaImgv = [[UIImageView
alloc]init];
        self.shanglaImgv.userInteractionEnabled =
YES;
        [view addSubview:self.shanglaImgv];
        self.shanglaImgv.image = [UIImage
imageNamed:@"s_d_xiangshang-biao"];
        [self.shanglaImgv
mas_makeConstraints:^(MASConstraintMaker *make) {
            make.right.mas_equalTo(lab_xs.mas_left).mas_offset(-TEXT_LINE_DISTANCE);
            make.centerY.mas_equalTo(view.mas_centerY);
            make.size.mas_equalTo(CGSizeMake(24,
24));
        }];
    }
    return view;
}