iOS下UITableView的单元格重用逻辑

终于有时间继续UITableView的接口调用顺序这篇文章了,之前测试过,模拟器都是按照height,cellForRow这样的顺序调用接口的,iOS8以前一直是这样,但是到了iOS8,这个顺序倒过来了这样倒是有好处,至少按照传统思路,单元格先创建,创建完成后就知道高度了.但这样怎么向下兼容呢,来试试这个粗略的办法.
在cellForRow,heightForRow两个接口中都调用一个函数,来创建单元格,但是要根据系统版本做判断区分

 -(H5TableCell*)tableView:(UITableView *)tableView makeCellForRowAtIndexPath:(NSIndexPath *)indexPath mode:(BOOL)isOnCellCreate
 {
     NSString* cellItemStyleNameStr = [self getCellStyle:indexPath];
     UIView* contentView = nil;
     H5TableCell  *cell = nil;
     if ((isOnCellCreate && ISIOS8) || (!isOnCellCreate && ISIOS7 && !ISIOS8))
     {
         cell =[tableView dequeueReusableCellWithIdentifier:cellItemStyleNameStr];
         if (cell==nil)
         {
             cell=[[H5TableCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellItemStyleNameStr];
             contentView = [self tableView:tableView viewForRowAtIndexPath:indexPath];
             [cell.contentView addSubview:contentView];
             cell.contentView.frame = CGRectMake(, , contentView.frame.size.width, contentView.frame.size.height);
         }
         else
         {
             NSUInteger idx = [cellArray indexOfObject:cell];
             if (NSNotFound != idx)
             {
                 NSIndexPath* reusedIndexPath = cell.IndexPath;
                 //KCLog(@"复用%ld.%ld for %ld.%ld",reusedIndexPath.section,reusedIndexPath.row,indexPath.section,indexPath.row);

                 //清除H5Core库登记的对该被复用indexPath单元的view登记
                 NSString* windowKey = [NSString stringWithFormat:@"%@_%ld_%ld",
                                        cellItemStyleNameStr,
                                        (long)reusedIndexPath.section,
                                        (long)reusedIndexPath.row];
                 //[[H5Core shareInstance] destroyH5CoreWindow:windowKey];
                 [self.delegate destructionWindowName:windowKey];
                 [cellArray removeObject:cell];
                 [cellIdArray removeObjectAtIndex:idx];
             }
             else
             {
                 KCLog(@"复用 未找到 for %ld.%ld",indexPath.section,indexPath.row);
             }
         }
         cell.IndexPath = indexPath;
         cell.delegate = self;
         cell.selectionStyle=UITableViewCellSelectionStyleNone;
         cell.backgroundColor=[UIColor clearColor];
         [cellArray addObject:cell];
         [cellIdArray addObject:indexPath];
     }
     else
     {
         //只是获取cell,因为已经创建过了
         NSUInteger idx = [cellIdArray indexOfObject:indexPath];
         if (NSNotFound != idx)
         {
             cell = [cellArray objectAtIndex:idx];
         }
         else
         {
             KCLog(@"非复用 未找到 for %ld.%ld",indexPath.section,indexPath.row);
         }

     }

     return cell;
 }

目前没有发现有复用未找到的情况.