ios 动态设置Cell高低

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

self.mainTitle=[[UILabel alloc]init];

            self.mainTitle.numberOfLines=0;

            self.mainTitle.font=[UIFont fontWithName:@"Hiragino Sans GB" size:14];

            self.mainTitle.text=cell_info.title;

            self.mainTitle.textColor=[UIColor grayColor];

            CGSize titleSize=[self.mainTitle.text boundingRectWithSize:CGSizeMake([UIScreen mainScreen].bounds.size.width-20, 0) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName: self.mainTitle.font} context:nil].size;

            self.rowHeight=titleSize.height;

            self.mainTitle.frame=CGRectMake(15, 3, titleSize.width,titleSize.height);

            [cell.contentView addSubview:self.mainTitle];

CGRect cellFrame=[cell frame];

        cellFrame.origin=CGPointMake(0,0);

        cellFrame.size.height=self.mainTitle.frame.size.height+5+self.imgOne.frame.size.height+5;

        [cell setFrame:cellFrame];

return cell;

}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    if (indexPath.section==0) {

        return 160;

    }

    else{

//        if (indexPath.row==0) {

//            UITableViewCell *cell=[self tableView:self.tableView cellForRowAtIndexPath:indexPath];

//            return cell.frame.size.height;

//        }

        UITableViewCell *cell=[self tableView:self.tableView cellForRowAtIndexPath:indexPath];

        return cell.frame.size.height;

    }

}

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