//图片列表

 NSMutableArray *pictureList;

 //分组列表

 NSMutableArray *indexArr;

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

 {

     static NSString *picWallItemView = @"picWallItemView";

     UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:picWallItemView];

     if (cell == nil) {

         cell = [[[UITableViewCell alloc]

                  initWithFrame:CGRectMake(, , self.view.frame.size.width, [self tableView:self.tableView heightForRowAtIndexPath:indexPath])] autorelease];

     }

     int num = [[indexArr objectAtIndex:indexPath.row] intValue];

     int index = ;

     for (int i = ; i < indexPath.row; i++) {

         index += [[indexArr objectAtIndex:i] intValue];

     }

     float tmpWidth = self.view.frame.size.width / num;

     float tmpHeight = [self tableView:self.tableView heightForRowAtIndexPath:indexPath];

     float left = ;

     for (int i = ; i < num; i ++) {

         left = i * tmpWidth;

         PicWallItemView *itemView = [[PicWallItemView alloc] initWithFrame:CGRectMake(left, , tmpWidth, tmpHeight)];

         itemView.delegate = self;

         NSDictionary *jsonDic = [pictureList objectAtIndex:index];

         PicWallItemTo *item = [PicWallItemTo fromDictionary:jsonDic];

         [itemView setIndentationWidth:];

         [itemView reloadData:item];

         [cell addSubview:itemView];

         [itemView setFrame:CGRectMake(left, , tmpWidth, tmpHeight)];

         [itemView release];

         index++;

     }

     return cell;

 }

         NSArray *arr = [obj objectForKey:MSG_DETALIST];

         NSUInteger total = [arr count];

         while (total > ) {

             int num = arc4random() %  + ;

             if(total > num){

                 [indexArr addObject:[NSNumber numberWithInt:num]];

                 total -= num;

             } else {

                 [indexArr addObject:[NSNumber numberWithInt:total]];

                 total = ;

             }

         }