Iphone remove sub view - ios

Question

I have a UINavigationController. On the right top i have a button on click of which i have to get a drop down table view. I created another UIViewController Class, with xib and added it as a subView to the current view. It should appear on 1st click and disappear on the 2nd click. This should happen for all click(open view and close view). I wrote this code but dont know where i'm going wrong. someone please help
-(void)modalTableView
{
tableView1 = [[TableViewController alloc] initWithNibName:#"TableViewController" bundle:nil];
for (UIView *subView in self.view.subviews)
{
if ([subView isKindOfClass:[TableViewController class]])
{
[subView removeFromSuperview];
}
else
{
[self.view addSubview:tableView1.view];
}
}
}
What am i missing here?
EDIT : TableViewController is the name of my UIViewController Class

Answer 1

The clue is here
for (UIView *subView in self.view.subviews)
each subView is of class UIView and your test
isKindOfClass:[TableViewController class]
is testing for class TableViewController
I would suggest a way of doing this would be by tagging the views that you add dynamically, with say 99 - and then in your loop you can identify those views by their tag.
eg.
for (UIView *subView in self.view.subviews)
{
if (subView.tag == 99)
{
[subView removeFromSuperview];
}
}

Answer 2

Swift version
To remove a single subview:
subView.removeFromSuperview()
To remove all subviews:
for subView in self.subviews as [UIView] {
subView.removeFromSuperview()
}
Source: What is the best way to remove all views from parent view / super view?

Answer 3

Try this,
if ([subView isKindOfClass:[UITableView class]])
{
[subView removeFromSuperview];
}

Answer 4

Here is something that should go some way to working - assuming that tableView1 is a retained #property (If not then maybe this SO answer on lazy loading techniques is for you).
-(void)modalTableView
{
if (tableView1 != nil)
{
tableView1 = [[TableViewController alloc] initWithNibName:#"TableViewController" bundle:nil];
}
if (tableView1.view.superview == nil)
{
[self.view addSubview:tableView1.view];
} else
{
[tableView1.view removeFormSuperview];
}
}