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- (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;     }

}

原文链接：http://blog.csdn.net/darongzi1314/article/details/44780199