UITableView中Cell和section的插入与删除

插入段：

- (void)insertSections:(NSIndexSet *)sections withRowAnimation:(UITableViewRowAnimation)animation;

- (void)deleteSections:(NSIndexSet *)sections withRowAnimation:(UITableViewRowAnimation)animation;

插入行：

- (void)insertRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation;

- (void)deleteRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation;

如果在编辑模式下，复写此方法：

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        if (indexPath.row == 0) {
            [self.modeInfomation removeObjectAtIndex:indexPath.section];
            [self.modeNameArr removeObjectAtIndex:indexPath.section];
            NSIndexSet *sectionIndex = [NSIndexSet indexSetWithIndex:indexPath.section];
            [self.tableView deleteSections:sectionIndex withRowAnimation:UITableViewRowAnimationLeft];
        }
        else {
            [[self.modeInfomation objectAtIndex:indexPath.section] removeObjectAtIndex:indexPath.row];
            [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
        }
    }   
    else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }   
}

在普通模式下：

[self.tableView beginUpdates];
    [[self.modeInfomation objectAtIndex:tag] addObject:@"hehe"];
    NSIndexPath *indexpath = [NSIndexPath indexPathForRow:row + 1 inSection:tag];
    [self.tableView insertRowsAtIndexPaths:@[indexpath] withRowAnimation:UITableViewRowAnimationRight];
    [self.tableView endUpdates];

注意：

插入或者删除行或段，先更新datasource，再insertRows或insertSections!两个都要更新！