How to hide & unhide Master View Controller in SplitView Controller

Question

I have created a new split view based project in my XCode 4.2

Then in DetailViewController.m file i have add this method

- (BOOL)splitViewController: (UISplitViewController*)svc shouldHideViewController:(UIViewController *)vc inOrientation:(UIInterfaceOrientation)orientation 
{
  //This method is only available in iOS5  

   return NO;
}

Now by doing this i can able to show both left & right part of my splitview Controller at a time.

Now i have added a UIBarButtonItem in my DetailViewController Navigation bar and i want by using which i can hide & show my Master View both in Portrairt and Landscape Mode.

- (IBAction)hideUnhide:(id)sender 
{

//How can hide & unhide

}

How can i do this?

Answer 1

instead spv.delegate=nil; spv.delegate=self;

you need to do next:

[spv willRotateToInterfaceOrientation:self.interfaceOrientation duration:0];

Answer 2

'setNeedsLayout' makes UISplitViewController to ask for "shouldHideViewController"

- (IBAction)hideUnhide:(id)sender  {
    UISplitViewController* spv = ...;

    self.hideMaster= !self.hideMaster;
    [ spv.view setNeedsLayout ]
}

Answer 3

In iOS 5.1 you have to do it this way:

Inside DetailViewController.m

- (IBAction)hideUnhide:(id)sender  {
    UISplitViewController* spv = ...;

    self.hideMaster= !self.hideMaster;

    [spv.view setNeedsLayout];
    spv.delegate = nil;
    spv.delegate = self;
}

- (BOOL)splitViewController:(UISplitViewController*)svc shouldHideViewController:(UIViewController *)vc inOrientation:(UIInterfaceOrientation)orientation {
    return self.hideMaster;
}

Answer 4

I combined the above responses and the following works well in IOS 6:

// In split delegate
-(void)hideMaster:(BOOL)hideState
{
   _masterIsHidden = hideState;

   [self.splitViewController.view setNeedsLayout];
   self.splitViewController.delegate = nil;
   self.splitViewController.delegate = self;

   [self.splitViewController willRotateToInterfaceOrientation:[UIApplication    sharedApplication].statusBarOrientation duration:0];
}

-(BOOL)splitViewController:(UISplitViewController *)svc shouldHideViewController:(UIViewController *)vc inOrientation:(UIInterfaceOrientation)orientation
{
    return self.masterIsHidden;
}

Answer 5

-(IBAction)clickToShowMaster:(id)sender
{
 UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"prev.png"] style:UIBarButtonItemStylePlain target:self action:@selector(clickToHidemaster:)];
 self.navigationItem.leftBarButtonItem = systemItem1;
[self.tabBarController.tabBar setHidden:NO];
[self hideMaster:NO];
}
-(void)hideMaster:(BOOL)hideState
{

ishideMaster=hideState;
[self.splitViewController.view setNeedsLayout];
self.splitViewController.delegate = nil;
self.splitViewController.delegate = self;

[self.splitViewController willRotateToInterfaceOrientation:[UIApplication    sharedApplication].statusBarOrientation duration:0];

 }

-(void)hideMaster:(BOOL)hideState
{
ishideMaster=hideState;
[self.splitViewController.view setNeedsLayout];
self.splitViewController.delegate = nil;
self.splitViewController.delegate = self;

[self.splitViewController willRotateToInterfaceOrientation:[UIApplication    sharedApplication].statusBarOrientation duration:0];

}


    #pragma mark - Split view

-(BOOL)splitViewController:(UISplitViewController *)svc shouldHideViewController:(UIViewController *)vc inOrientation:(UIInterfaceOrientation)orientation
{

    if(UIInterfaceOrientationIsPortrait(orientation))
    {
        UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"down.png"] style:UIBarButtonItemStylePlain target:self action:@selector(showPopup)];
        self.navigationItem.leftBarButtonItem = systemItem1;
        [self setUIforPortrait];
        return YES;
    }
     if (UIInterfaceOrientationIsLandscape(orientation))
    {
        if(ishideMaster==TRUE)
        {
            UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"next.png"] style:UIBarButtonItemStylePlain target:self action:@selector(clickToShowMaster:)];
            self.navigationItem.leftBarButtonItem = systemItem1;
            [self setUIForFullLandscape];
        }
        else
        {
            UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"prev.png"] style:UIBarButtonItemStylePlain target:self action:@selector(clickToHidemaster:)];
            self.navigationItem.leftBarButtonItem = systemItem1;
            [self setUIForHalfLandscape];
        }
        return ishideMaster;
    }

}
//add the navigation button on left top, to pop-up master view.
- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController
{
    [barButtonItem setImage:[UIImage imageNamed:@"down.png"]];

    UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"down.png"] style:UIBarButtonItemStylePlain target:self action:@selector(showPopup)];
    self.navigationItem.leftBarButtonItem = systemItem1;
   self.masterPopoverController = popoverController;
    self.masterPopoverController.delegate=self;
}

- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
    // Called when the view is shown again in the split view, invalidating the button and popover controller.
    //;
    if(UIInterfaceOrientationIsLandscape(self.interfaceOrientation))
    {
        if(ishideMaster==FALSE)
        {
            UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"prev.png"] style:UIBarButtonItemStylePlain target:self action:@selector(clickToHidemaster:)];
            self.navigationItem.leftBarButtonItem = systemItem1;
        }
        else
        {
            UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"next.png"] style:UIBarButtonItemStylePlain target:self action:@selector(clickToShowMaster:)];
            self.navigationItem.leftBarButtonItem = systemItem1;

        }
    }
    else if(UIInterfaceOrientationIsPortrait(self.interfaceOrientation))
    {
        [self.navigationItem setLeftBarButtonItem:nil animated:YES];

    }
   //self.masterPopoverController = nil;
}

Answer 6

In iOS8 this is easy.

To hide it

[UIView animateWithDuration:0.2 animations:^{
    splitViewController.preferredDisplayMode = UISplitViewControllerDisplayModePrimaryHidden;
} completion:nil];

To show it

[UIView animateWithDuration:0.2 animations:^{
    self.splitViewController.preferredDisplayMode = UISplitViewControllerDisplayModePrimaryOverlay;
} completion:nil];

Answer 7

Regarding wzbozon's comment about not needing to reassign the delegate, I found that the two lines

self.splitViewController.delegate = nil;

self.splitViewController.delegate = self;

...were not needed on the simulator but were needed on my iOS5 iPad 1. Without them, the hide/show behavior did not occur (clicking the button did not collapse the master view).

Answer 8

Well, the easy part of your question is to use a bool, say a property hideMaster, and then

- (IBAction)hideUnhide:(id)sender 
{

   self.hideMaster= !self.hideMaster;

}

and then...

- (BOOL)splitViewController: (UISplitViewController*)svc shouldHideViewController:(UIViewController *)vc inOrientation:(UIInterfaceOrientation)orientation 
{
  //This method is only available in iOS5  

   return self.hideMaster;
}

That works fine, but the shouldHideViewController is only called during a redraw of the splitVC, such as during a rotation, so the master only hides/unhides then.

Answer 9

You can show/hide the master ViewController by triggering the action of the displayModeButtonItem property of UISplitViewController:

Swift

if let displayModeButtonItem = splitViewController?.displayModeButtonItem() {
    displayModeButtonItem.target?.performSelector(displayModeButtonItem.action)
}

Objective-C

UIBarButtonItem *displayModeButtonItem = [self.splitViewController displayModeButtonItem];
[displayModeButtonItem.target performSelector: displayModeButtonItem.action];

It feels more proper to me than meddling with the delegate, the orientation and the layout at the same time.

Answer 10

SWIFT 3.0

I've used

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "showDetail" {
            if let indexPath = self.tableView.indexPathForSelectedRow {
                let object = self.exercises[indexPath.row] 
                let controller = (segue.destination as! UINavigationController).topViewController as! DetailViewController
                controller.detailItem = object
                controller.navigationItem.leftBarButtonItem = self.splitViewController?.displayModeButtonItem
                controller.navigationItem.leftItemsSupplementBackButton = true
                UIView.animate(withDuration: 0.2, delay: 0.0, options: [.curveEaseOut], animations: {
                    self.splitViewController?.preferredDisplayMode = .primaryHidden
                }, completion: nil)

            }
        }
    }

Answer 11

- (BOOL)splitViewController:(UISplitViewController*)svc shouldHideViewController:(UIViewController *)vc inOrientation:(UIInterfaceOrientation)orientation {
    [spv.view setNeedsLayout];  //add the line
    return self.hideMaster;
}