RootViewController snippet to support iPhone X Safe Area

RootViewController.mm

@implementation RootViewController

// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {

    // Initialize the CCEAGLView
    CGFloat nscale = [[UIScreen mainScreen] nativeScale];
    NSLog(@"window.nativescale = %f", nscale);
    printf("window.nativescale = %f\n", nscale);
    CGRect nbounds = [[UIScreen mainScreen] nativeBounds];
    NSLog(@"window.nativeBounds = %@", NSStringFromCGRect(nbounds));
    printf("window.nativeBounds = %f x %f\n", nbounds.size.width, nbounds.size.height);

    CGRect screenBounds = [UIScreen mainScreen].bounds;
    NSLog(@"screenBounds = %@", NSStringFromCGRect(screenBounds));
    printf("screenBounds = %f x %f\n", screenBounds.size.width, screenBounds.size.height);

    // NOTE(steve): create the background view that will display outside the safe area
    UIView* backgroundView = [[UIView alloc] initWithFrame:screenBounds];
    //[backgroundView setBackgroundColor:[UIColor magentaColor]]; // Debug/Test
    [backgroundView setBackgroundColor:[UIColor blackColor]];
    self.view = backgroundView;

    // NOTE(steve): Moving into didAppear in order to have valid safe area insets

//    CCEAGLView *eaglView = [CCEAGLView viewWithFrame:screenBounds
//                                         pixelFormat: (__bridge NSString *)cocos2d::GLViewImpl::_pixelFormat
//                                         depthFormat: cocos2d::GLViewImpl::_depthFormat
//                                  preserveBackbuffer: NO
//                                          sharegroup: nil
//                                       multiSampling: NO
//                                     numberOfSamples: 0 ];
//
//    eaglView.contentScaleFactor = [[UIScreen mainScreen] nativeScale];
//
//    // Enable or disable multiple touches
//    [eaglView setMultipleTouchEnabled:YES];
//
//    // Set EAGLView as view of RootViewController
//    [self.view addSubview:eaglView];
//
//    //cocos2d::GLView *glview = cocos2d::GLViewImpl::createWithEAGLView((__bridge void *)self.view);
//    cocos2d::GLView *glview = cocos2d::GLViewImpl::createWithEAGLView((__bridge void *)eaglView);
//
//    //set the GLView as OpenGLView of the Director
//    cocos2d::Director::getInstance()->setOpenGLView(glview);
//
//
//    //run the cocos2d-x game scene
//    app->run();
}

- (void)safeAreaInsetsDidChange {
    NSLog(@"safeAreaInsetsDidChange called ....");
}

// Implement viewDidLoad to do additional setup after loading the view
- (void)viewDidLoad {
    [super viewDidLoad];
    if (@available(iOS 11.0, *)) {
        // This should only be necessary if you changed the return value of the property
        // `BOOL preferredScreenEdgesDeferringSystemGestures`, but in limited testing needed this
        [self setNeedsUpdateOfScreenEdgesDeferringSystemGestures];
    } else {
        // Fallback on earlier versions
    }
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    if (@available(iOS 11.0, *)) {
        [self setNeedsUpdateOfScreenEdgesDeferringSystemGestures];
    } else {
        // Fallback on earlier versions
    }
}

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

    // NOTE(steve): may want to check if insets are valid in willappear to avoid any possible "blink" due to creating/adding view after already on screen

    // NOTE(steve): could also use the LayoutGuide instead
    // check for devices with safe area
    CGRect safeViewBounds = self.view.bounds;
    if (@available(iOS 11.0, *))
    {
        BOOL hasSafeArea = self.view.insetsLayoutMarginsFromSafeArea;
        NSLog(@"hasSafeArea = %d", hasSafeArea);

        UIEdgeInsets safeInsets = self.view.safeAreaInsets;
        CGSize size = safeViewBounds.size;
        CGPoint origin = safeViewBounds.origin;
        NSLog(@"safeInsets = %@", safeInsets);

        // NOTE(steve): remember UIView frame is "Y flipped" => origin @ top-left
        safeViewBounds = CGRectMake(origin.x + safeInsets.left,
                                origin.y + safeInsets.top,
                                size.width - safeInsets.left - safeInsets.right,
                                size.height - safeInsets.top - safeInsets.bottom);
        NSLog(@"safeViewBounds = %@", safeViewBounds);
    } else {
        // Fallback on earlier versions
        // NOTE(steve): don't do anything for older phones
    }

    cocos2d::Application *app = cocos2d::Application::getInstance();

    // Initialize the GLView attributes
    app->initGLContextAttrs();
    cocos2d::GLViewImpl::convertAttrs();

    CCEAGLView *eaglView = [CCEAGLView viewWithFrame:safeViewBounds
                                         pixelFormat: (__bridge NSString *)cocos2d::GLViewImpl::_pixelFormat
                                         depthFormat: cocos2d::GLViewImpl::_depthFormat
                                  preserveBackbuffer: NO
                                          sharegroup: nil
                                       multiSampling: NO
                                     numberOfSamples: 0 ];

    eaglView.contentScaleFactor = [[UIScreen mainScreen] nativeScale];

    // Enable or disable multiple touches
    [eaglView setMultipleTouchEnabled:YES];

    // Set EAGLView as view of RootViewController
    [self.view addSubview:eaglView];

    //cocos2d::GLView *glview = cocos2d::GLViewImpl::createWithEAGLView((__bridge void *)self.view);
    cocos2d::GLView *glview = cocos2d::GLViewImpl::createWithEAGLView((__bridge void *)eaglView);

    //set the GLView as OpenGLView of the Director
    cocos2d::Director::getInstance()->setOpenGLView(glview);

    //run the cocos2d-x game scene
    app->run();
}

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

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
    [super didRotateFromInterfaceOrientation:fromInterfaceOrientation];

    auto glview = cocos2d::Director::getInstance()->getOpenGLView();

    if (glview)
    {
        CCEAGLView *eaglview = (__bridge CCEAGLView *)glview->getEAGLView();

        if (eaglview)
        {
            CGSize s = CGSizeMake([eaglview getWidth], [eaglview getHeight]);
            cocos2d::Application::getInstance()->applicationScreenSizeChanged((int) s.width, (int) s.height);
        }
    }

    if (@available(iOS 11.0, *)) {
        [self setNeedsUpdateOfScreenEdgesDeferringSystemGestures];
    } else {
        // Fallback on earlier versions
    }
}

- (BOOL)shouldAutorotate {
    return YES;
}

//fix not hide status on ios7
- (BOOL)prefersStatusBarHidden {
    return YES;
}

- (BOOL)prefersHomeIndicatorAutoHidden {
    // NOTE(steve): setting this to yes causes the defer system edge gestures to not work
    //return YES;
    return NO;
}

- (UIRectEdge)preferredScreenEdgesDeferringSystemGestures
{
    return UIRectEdgeAll;
    // NOTE(steve): should probably just defer the bottom swipe (home gesture)
    //return UIRectEdgeBottom;
}