static NSString *CellIdentifier = @"treeNodeCell";
UINib *nib = [UINib nibWithNibName:@"ProjectCell" bundle:nil];
[tableView registerNib:nib forCellReuseIdentifier:CellIdentifier];
TheProjectCell *cell = (TheProjectCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
TreeViewNode *node = [self.displayArray objectAtIndex:indexPath.row];
cell.treeNode = node;
<span style="color:#ff0000;">[cell.cellButton sendActionsForControlEvents:extend];</span>
树型界面上面的按钮可以用sendactionforcontrolevents:方法调用