UITableView可扩展+动态单元格高度（根据UITableViewCell内的UITextView）

Question

我正在开发一个项目，我必须将其作为新闻应用程序实现。我的意思是最初所有单元格都包含新闻标题，当用户点击任何标题时，内容将通过展开单元格来显示。请为此建议一些教程。我正在使用以下代码来扩展单元格。

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    BOOL isChild =
    currentExpandedIndex > -1
    && indexPath.row > currentExpandedIndex
    && indexPath.row <= currentExpandedIndex + [[subItems objectAtIndex:currentExpandedIndex] count];

    if (isChild) {
        NSLog(@"A child was tapped, do what you will with it");
        return;
    }

    [self.tableView beginUpdates];

    if (currentExpandedIndex == indexPath.row) {
        [self collapseSubItemsAtIndex:currentExpandedIndex];
        currentExpandedIndex = -1;
    }
    else {

        BOOL shouldCollapse = currentExpandedIndex > -1;

        if (shouldCollapse) {
            [self collapseSubItemsAtIndex:currentExpandedIndex];
        }

        currentExpandedIndex = (shouldCollapse && indexPath.row > currentExpandedIndex) ? indexPath.row - [[subItems objectAtIndex:currentExpandedIndex] count] : indexPath.row;

        [self expandItemAtIndex:currentExpandedIndex];
    }

    [self.tableView endUpdates];

}

Answer 1

以下是一些非常适合实施消耗性细胞的方法：

1. https://github.com/OliverLetterer/SLExpandableTableView

2. https://github.com/singhson/Expandable-Collapsable-TableView

Answer 2

试试此代码

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    // Set expanded cell then tell tableView to redraw with animation
    self.expandedRow = indexPath;
    [self.tableView beginUpdates];
    [self.tableView endUpdates];
}

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

   if ([indexPath isEqual:self.expandedRow]) {
      return EXPANDED_HEIGHT;
   }

    return NORMAL_HEIGHT;
}