Dismissing UIPopoverController with UINavigationController - ios

Question

I'm currently building an iPad app in which I need to implement a pop over view.
I have set up a view controller like I always do:
Create UIViewController wit xib file
set the xib up and do the necessary programming in it's .h & .m files
now in the view controller I'm loading it from (from a UIBarButtonItem), I have this code:
- (void) action
{
ItemContent *newItem = [[ItemContent alloc] initWithNibName:#"ItemContent" bundle:nil];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:newItem];
_popover = [[UIPopoverController alloc] initWithContentViewController:nav];
[_popover setPopoverContentSize:CGSizeMake(557, 700) animated:YES];
_popover.delegate = self;
[_popover presentPopoverFromBarButtonItem:self.navigationItem.rightBarButtonItem permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
}
This properly displays my view- and UINavigationController in a UIPopOverController. So far so good!
In the newItem view controller, I have made a bar button in my navigation bar that says "Done". When that button is pushed, I want the UIPopOverController to disappear. How do I do this:
Set a method for when te button is pushed. In this method I want to call a function on the view controller that loaded the Popover to dismiss it again.. but how do I do this?
Put things shortly
How do I make my UIPopOverController call a method on the view controller that loaded the UIPopOverController?
I have been searching SO for a while but none of the solutions and answers solve my problem. If I missed something please inform me ;)
Thank you so much in advance!

Answer 1

You can do this by delegate...
In NewItem.h declare a protocol
#protocol NewItemDelegate
-(void)onTapDoneButton;
#end
Now create a delegate property like this
#property (nonatomic, assign) id<NewItemDelegate>delegate;
In NewItem.m in doneButtonPuhsed method call this
[self.delegate onTapDoneButton];
Change this method a bit
- (void) action
{
ItemContent *newItem = [[ItemContent alloc] initWithNibName:#"ItemContent" bundle:nil];
newItem.delegate =self;
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:newItem];
_popover = [[UIPopoverController alloc] initWithContentViewController:nav];
[_popover setPopoverContentSize:CGSizeMake(557, 700) animated:YES];
_popover.delegate = self;
[_popover presentPopoverFromBarButtonItem:self.navigationItem.rightBarButtonItem permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
}
Now implement NewItemDelegate method below this action method.
-(void)onTapDoneButton{
//dismiss popover here
}

Answer 2

I had this problem too and solved it using notifications.
In your parent controller, in viewDidLoad method, you have to add an observer:
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(closePopover)
name:#"closePopoverName"
object:nil];
Then, in your viewDidUnload method you remove the observer like this:
[[NSNotificationCenter defaultCenter] removeObserver:self];
Of course, you have to create the function which actually dismisses the popover:
- (void) closePopover
{
[_popover dismissPopoverAnimated:YES];
}
Then, in your ItemContent controller, you just post a notification when you want to close the popover:
[[NSNotificationCenter defaultCenter] postNotificationName:#"closePopoverName" object:self userInfo:nil];

Answer 3

You could define a protocol on ItemContent and use it on your CallerViewController. If you want to close your Popover, just call your delegate method, which you will implement on your CallerViewController