我有 UITableView,它使用一个高约 200 像素的 commentTableCell,它既有文本又有图像。
我希望当未选择一行时,该行的高度约为 65 像素,这将隐藏所有图像,当该行扩展到 200 像素时,commentTableCell 将完全展开,因此单元格内的图像会得到裸露。
但是我遇到的问题是,当所有行都折叠到 65 像素的高度时,commentTabelCell 中的任何图像都不应该显示,但是我从表格的某些部分显示的单元格中得到了重影或部分图像。为什么?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"customCell";
CommentTableCell *cell = (CommentTableCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
return cell;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if(selectedIndex == indexPath.row)
{
return 200;
}
else {
return 65;
}
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//The user is selecting the cell which is currently expanded
//we want to minimize it back
if(selectedIndex == indexPath.row)
{
selectedIndex = -1;
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
return;
}
//First we check if a cell is already expanded.
//If it is we want to minimize make sure it is reloaded to minimize it back
if(selectedIndex >= 0)
{
NSIndexPath *previousPath = [NSIndexPath indexPathForRow:selectedIndex inSection:0];
selectedIndex = indexPath.row;
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:previousPath] withRowAnimation:UITableViewRowAnimationFade];
}
//Finally set the selected index to the new selection and reload it to expand
selectedIndex = indexPath.row;
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}