UIPageViewController example - demo of the pageViewController not interfering with touches on the child VCs.

AppDelegate.m

#import "AppDelegate.h"
#import "ContainerVC.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    
    self.window.rootViewController = [[ContainerVC alloc] init];
    
    self.window.tintColor = [UIColor whiteColor];
    
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

@end

ContainerVC.h

#import <UIKit/UIKit.h>

@interface ContainerVC : UIViewController <UIPageViewControllerDataSource, UIPageViewControllerDelegate>

@property (strong, nonatomic) UIPageViewController *pageViewController;

@end

ContainerVC.m

#import "ContainerVC.h"
#import "Page1VC.h"
#import "Page2VC.h"

@interface ContainerVC ()

@property (strong, nonatomic) NSArray *dataSource;

@end

@implementation ContainerVC

- (void)loadView
{
    UIView *view = [[UIView alloc] init];
    view.backgroundColor = [UIColor blackColor];
    
    self.view = view;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.pageViewController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll
                                                              navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal
                                                                            options:nil];
    self.pageViewController.dataSource = self;
    self.pageViewController.delegate = self;
    [[self.pageViewController view] setFrame:CGRectMake(0, 0, 320, 500)];

    Page1VC *page1VC = [[Page1VC alloc] init];
    page1VC.index = 0;
    Page2VC *page2VC = [[Page2VC alloc] init];
    page2VC.index = 1;
    
    self.dataSource = @[page1VC, page2VC];
    
    [self.pageViewController setViewControllers:@[self.dataSource[0]]
                                      direction:UIPageViewControllerNavigationDirectionForward
                                       animated:YES
                                     completion:nil];
    
    [self addChildViewController:self.pageViewController];
    [self.view addSubview:self.pageViewController.view];
    [self.pageViewController didMoveToParentViewController:self];
}

- (void)viewWillLayoutSubviews
{
    [super viewWillLayoutSubviews];
    self.pageViewController.view.frame = CGRectMake(0, 0, 320, CGRectGetHeight(self.view.frame));
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController
      viewControllerBeforeViewController:(UIViewController *)viewController
{
    NSUInteger index = [(id)viewController index];

    if(index == 0) {
        return nil;
    }
    
    index--;
    
    return self.dataSource[index];
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController
       viewControllerAfterViewController:(UIViewController *)viewController
{
    NSUInteger index = [(id)viewController index];
    
    index++;
    
    if(index == 2) {
        return nil;
    }

    return self.dataSource[index];
}


- (NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController {
    return self.dataSource.count;
}

- (NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController {
    return 0;
}

@end

Page1VC.h

#import <UIKit/UIKit.h>

@interface Page1VC : UIViewController

@property (assign, nonatomic) NSInteger index;

@end

Page1VC.m

#import "Page1VC.h"

@interface Page1VC ()

@property (strong, nonatomic) UIButton *button;

@end

@implementation Page1VC

- (void)loadView
{
    UIView *view = [[UIView alloc] init];
    view.backgroundColor = [UIColor colorWithRed:1.0 green:0.3 blue:0.3 alpha:1.0];
    
    self.view = view;
}

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

    if(![self.button isDescendantOfView:self.view]) {
      self.button = [UIButton buttonWithType:UIButtonTypeSystem];
      [self.button setTitle:@"click me" forState:UIControlStateNormal];
      [self.button addTarget:self action:@selector(clicked:) forControlEvents:UIControlEventTouchUpInside];
      self.button.frame = CGRectMake(200, 200, 80, 30);
      [self.view addSubview:self.button];
    }
}

- (void)clicked:(id)sender
{
    NSLog(@"button click received from Page1VC");
}

@end

Page2VC.h

#import <UIKit/UIKit.h>

@interface Page2VC : UIViewController

@property (assign, nonatomic) NSInteger index;

@end

Page2VC.m

#import "Page2VC.h"

@interface Page2VC ()

@property (strong, nonatomic) UIButton *button;

@end

@implementation Page2VC

- (void)loadView
{
    UIView *view = [[UIView alloc] init];
    view.backgroundColor = [UIColor colorWithRed:0.3 green:0.3 blue:1.0 alpha:1.0];
    
    self.view = view;
}

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

    if(![self.button isDescendantOfView:self.view]) {
      self.button = [UIButton buttonWithType:UIButtonTypeSystem];
      [self.button setTitle:@"click me" forState:UIControlStateNormal];
      [self.button addTarget:self action:@selector(clicked:) forControlEvents:UIControlEventTouchUpInside];
      self.button.frame = CGRectMake(200, 120, 80, 30);
      [self.view addSubview:self.button];
    }
}

- (void)clicked:(id)sender
{
    NSLog(@"button click received from Page2VC");
}

@end