iOS-不使用UIBarButtonItem使用委托方法即可显示/隐藏UISplitViewController

Question

I'am trying to develop a multi-orientation app for iPad's. At landscape mode, the MasterViewController should always visible and I don't have any problem on that. But at portraid mode, I have to create a show/hide method. The main problem is, I cannot use delegate methods which are

-(void)splitViewController:(UISplitViewController *)svc willHideViewController:(UIViewController *)aViewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)pc

and

-(void)splitViewController:(UISplitViewController *)svc willShowViewController:(UIViewController *)aViewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem

Because my detailViewController is not a NavigationController and shouldn't be. Also detailViewController cannot have a NavigationItem. Let me explain why:

I want my all pages have a dashboard-like views at the bottom of the screen. So I never change detailViewController. At the top of the screen, I have a Navigation Controller embedded in a container view. So If you selected one of the MasterViewController's tableview items, the NavigationController's rootViewController is changing. That's why I cannot have a Navigation item in detailViewController.

These rootViewControllers have buttons which are passing their states to detailViewController wia a custom delegate method. And this method have to hide/show masterviewcontroller.

I don't want to create some custom views and/or animations or custom popover to achieve this. Can anyone help me?

Answer 1

Detail View Controller Does not need to be UINavigationController to be delegate to split view.

You can have set DetailViewController as delegate for the UISplitViewController . When the split view will hide the view (portrait) save the popover, which you can later show if needed.

Users might still show it without any button to - with swipe from left side of screen. If it's enough for your app then you don't need to implement the delegate methods.

// In App Delegate or Nib:
splitViewController.delegate = detailViewController;




// In Detail View Controller :

- (void)splitViewController:(UISplitViewController*)svc
     willHideViewController:(UIViewController *)aViewController
          withBarButtonItem:(UIBarButtonItem*)barButtonItem
       forPopoverController:(UIPopoverController*)pc {


    self.popoverController = pc;

    // Update ui 
    ...
 }


 - (void)splitViewController:(UISplitViewController*)svc
     willShowViewController:(UIViewController *)aViewController
  invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem {

  self.popoverController = nil;
}


- (void)showMenu {
  [self.popoverController presentPopoverFromRect: ...]
}