Removing View from its superview getting a bad access error XCODE - objective-c

Question

since the release of the storyboard it has been a long time since I've used addSubview and removeFromSuperview. Obviously I have forgotten how to use them.
So on my UIViewControllerA I have this code for a button:
- (IBAction)buttonClickHandler:(id)sender {
dyf_FacebookViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:#"Facebook"];
[self.view addSubview:controller.view];
}
Which loads a UIView that is handled by UIViewControllerB. now this view can be called by many different ViewControllers to be a subview, which is why I have it remove itself from the superview.
So on UIViewControllerB I have this code:
- (IBAction)close:(id)sender {
[self.view removeFromSuperview];
}
Unfortunately that returns with a bad access error. Please help!
Thanks
Michael
EDIT:
The subview added (subview's viewcontroller) will be in control for removing itself as it is in control of the button on the subview. So I do not have access to the original controller.view variable as that is in ViewControllerA

Answer 1

You'll have to keep a reference to your dyf_FacebookViewController object, so you can do the following:
- (IBAction)close:(id)sender {
[controller.view removeFromSuperview];
}
What you're doing now is to remove your main view from its superview, which can have serious consequences, giving you a bad access.

Answer 2

if ([controller.view superView]) {
[controller.view removeFromSuperview];
}

Answer 3

Try this
- (IBAction)close:(id)sender {
for (UIView *subView in self.view.subviews) {
[subView removeFromSuperview];
}
}

Answer 4

If you want to remove the view you added, then keep a copy of the view controller...
// in this VC.m
#interface
#property (nonatomic, strong) dyf_FacebookViewController *dyfController;
#end
- (IBAction)buttonClickHandler:(id)sender {
self.dyfController = [self.storyboard instantiateViewControllerWithIdentifier:#"Facebook"];
[self.view addSubview:self.dyfController.view];
}
Later, to close the view...
[self.dyfController.view removeFromSuperview];