确定视图是否在弹出视图中

    UIView *v=theViewInQuestion;        
    for (;v.superview != nil; v=v.superview) {
        if (!strcmp(object_getClassName(v), "UIPopoverView")) {
            NSLog(@"\n\n\nIM IN A POPOVER!\n\n\n\n");
        }

theViewInQuestion =  theViewControllerInQuestion.view;

UIPopoverPresentationController .arrowDirection

viewWillApear()

// get it from parent NavigationController
UIPopoverPresentationController* popoverPresentationVC = self.parentViewController.popoverPresentationController; 
if (UIPopoverArrowDirectionUnknown > popoverPresentationVC.arrowDirection) {
// presented as popover
} else {
// presented as modal view controller (on iPhone)
}

#import "Foundation/Foundation.h"

@protocol PopoverSensitiveController 
-(void) setIsInPopover:(BOOL) inPopover;
@end

#import 
#import "PopoverSensitiveController.h"

#pragma mark -
#pragma mark Interface
@interface MyViewController : UIViewController  {
}

#pragma mark -
#pragma mark Properties
@property (nonatomic) BOOL isInPopover;

#pragma mark -
#pragma mark Instance Methods
...other stuff...
@end

#import "MySplitViewControllerDelegate.h"
#import "SubstitutableDetailViewController.h"
#import "PopoverSensitiveController.h"

#pragma mark -
#pragma mark Implementation
@implementation MySplitViewControllerDelegate

#pragma mark -
#pragma mark UISplitViewControllerDelegate protocol methods
-(void) splitViewController:(UISplitViewController *) splitViewController willHideViewController:(UIViewController *) aViewController withBarButtonItem:(UIBarButtonItem *) barButtonItem forPopoverController:(UIPopoverController *) pc {

  // Keep references to the popover controller and the popover button, and tell the detail view controller to show the button
  popoverController = [pc retain];
  popoverButtonItem = [barButtonItem retain];
  if ([[splitViewController.viewControllers objectAtIndex:1] respondsToSelector:@selector(showRootPopoverButtonItem:)]) {
      UIViewController *detailViewController = [splitViewController.viewControllers objectAtIndex:1];
      [detailViewController showRootPopoverButtonItem:barButtonItem];
  }
  if ([[splitViewController.viewControllers objectAtIndex:1] respondsToSelector:@selector(showRootPopoverButtonItem:)]) {
      UIViewController *detailViewController = [splitViewController.viewControllers objectAtIndex:1];
      [detailViewController showRootPopoverButtonItem:barButtonItem];
  }

  // If the view controller wants to know, tell it that it is a popover
  if ([aViewController respondsToSelector:@selector(setIsInPopover:)]) {
    [(id) aViewController setIsInPopover:YES];
  }

  // Make sure the proper view controller is in the popover controller and the size is as requested
  popoverController.contentViewController = aViewController;
  popoverController.popoverContentSize = aViewController.contentSizeForViewInPopover;

}

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

  // Tell the detail view controller to hide the button.
  if ([[splitViewController.viewControllers objectAtIndex:1] respondsToSelector:@selector(invalidateRootPopoverButtonItem:)]) {
    UIViewController *detailViewController = [splitViewController.viewControllers objectAtIndex:1];
    [detailViewController invalidateRootPopoverButtonItem:barButtonItem];
  }

  // If the view controller wants to know, tell it that it is not in a popover anymore
  if ([aViewController respondsToSelector:@selector(setIsInPopover:)]) {
    [(id) aViewController setIsInPopover:NO];
  }

  // Now clear out everything
  [popoverController release];
  popoverController = nil;
  [popoverButtonItem release];
  popoverButtonItem = nil;

}

-(void) setPopoverButtonForSplitViewController:(UISplitViewController *) splitViewController {

  // Deal with the popover button
  UIViewController *detailViewController = [splitViewController.viewControllers objectAtIndex:1];
  [detailViewController showRootPopoverButtonItem:popoverButtonItem];

  // If the view controller wants to know, tell it that it is a popover (initialize the controller properly)
  if ([[splitViewController.viewControllers objectAtIndex:0] respondsToSelector:@selector(setIsInPopover:)]) {
    [(id) [splitViewController.viewControllers objectAtIndex:0] setIsInPopover:YES];
  }

}

for (UIView *v = self.view; v.superview != nil; v=v.superview) { 

    if ([v isKindOfClass:[NSClassFromString(@"_UIPopoverView") class]]) {

        NSLog(@"\n\n\nIM IN A POPOVER!\n\n\n\n");

    }
}

- (BOOL)isContainedInPopover
{
    UIPopoverPresentationController* popoverPresentationVC = self.parentViewController.popoverPresentationController;
    return (popoverPresentationVC != nil);
}

popoverPresentationController

/* MasterViewController.h */

#import "UIPopoverViewDelegate.h"

@interface masterViewController : UITableViewController <UIPopoverViewDelegate>
@property (nonatomic) BOOL isInPopover;
@end

/* MasterViewController.m */

#import "MasterViewController.h"

@implementation MasterViewController

@synthesize isInPopover = _isInPopover;

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    if (self.isInPopover)
    {
        // Code for appearing in popover
    }
    else
    {
        // Code for not appearing in popover
    }
}

@end

/* DetailViewController.h */

#import "UIPopoverViewDelegate.h"

@interface detailViewController : UIViewController <UISplitViewControllerDelegate>
@end

/* DetailViewController.m */

#import "DetailViewController.h"

@implementation detailViewController

- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController
{

    /* This method is called when transitioning to PORTRAIT orientation. */

    UIViewController *hiddenViewController = [(UINavigationController *)viewController childViewControllers].lastObject;

    if ([hiddenViewController respondsToSelector:@selector(setIsInPopover:)])
        [(id <UIPopoverViewDelegate>)hiddenViewController setIsInPopover:YES];
}

- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{

    /* This method is called when transitioning to LANDSCAPE orientation. */

    UIViewController *shownViewController = [(UINavigationController *)viewController childViewControllers].lastObject;

    if ([shownViewController respondsToSelector:@selector(setIsInPopover:)])
        [(id <UIPopoverViewDelegate>)shownViewController setIsInPopover:NO];
}

@end

/* UIPopoverViewDelegate.h */

@protocol UIPopoverViewDelegate
@required
-(void)setIsInPopover:(BOOL)inPopover;
@end

func presentationController(_ controller: UIPresentationController, viewControllerForAdaptivePresentationStyle style: UIModalPresentationStyle) -> UIViewController? {

    (controller.presentedViewController as? YourViewControler).isPopover = false

    return controller.presentedViewController
}

class AdvisorHomeFilterViewController: UIViewController {

    // MARK: - Properties

    var isPopover = true
}

- (void)viewWillAppear:(BOOL)animated {
[self setContentSizeForViewInPopover:CGSizeMake(400, 500)];

NSInteger frameWidth = self.view.frame.size.width;
//Let you go back to the game if on an iPod.
if ( ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) && !(frameWidth == 400) ) { ---code to display a button --}

- (BOOL) isInPopOver {
    UIView *currentView = self.view;
    while( currentView ) {
        NSString *classNameOfCurrentView = NSStringFromClass([currentView class]);
        NSLog( @"CLASS-DETECTED: %@", classNameOfCurrentView );
        NSString *searchString = @"UIPopoverView";
        if( [classNameOfCurrentView rangeOfString:searchString options:NSCaseInsensitiveSearch].location != NSNotFound ) {
            return YES;
        }
        currentView = currentView.superview;
    }
    return NO;
}

isInPopover popoverControllerDidDismissPopover viewWillDisappear

self.popoverPresentationController self.popoverPresentationController.presentingViewController self

extension UIViewController

func isInPopover() -> Bool {
    guard UIDevice.current.userInterfaceIdiom == .pad else { return false }

    var checkingVC: UIViewController? = self
    repeat {
        if checkingVC?.modalPresentationStyle == .popover {
            return true
        }
        checkingVC = checkingVC?.parent
    } while checkingVC != nil
    return false
}