How can remove a print expression from my project? (Swift / Xcode)

Question

If I comment out the print line so much, everything in toVC does not load. Each ofVC element is zero. If I leave the expression to print, everything will work as intended. Why?

I use the method UITabBarControllerDelegate animationControllerForTransitionFromif this helps.

This has never happened before. As soon as I delete a line, it breaks the first time I touch any item attached to IBOutlet. Any help would be greatly appreciated.

func animateToProfile(using transitionContext: UIViewControllerContextTransitioning) {
    guard let fromVC = transitionContext.viewController(forKey: .from)?.childViewControllers.first,
        let toVC = transitionContext.viewController(forKey: .to)?.childViewControllers.first as? ProfileViewController,
        let superviewToAdd = toVC.parent?.view else { return }

    print("\(toVC.view.frame)")

    let sideMenuOriginX = UIScreen.main.bounds.width * (98 / 414)

    toVC.sideMenuView.frame.origin.x = toVC.view.frame.width
    toVC.visualEffectView.alpha = 0

    transitionContext.containerView.addSubview(superviewToAdd)

    let duration = transitionDuration(using: transitionContext)

    UIView.animate(withDuration: duration, delay: 0, options: [.curveEaseInOut], animations: {
        toVC.sideMenuView.frame.origin.x = sideMenuOriginX
        toVC.visualEffectView.alpha = 1
    }, completion: { _ in
        transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
    })
}

Answer 1

. UIViewControllers , SDK . viewDidLoad, .

, toVC.view , .

, toVC.sideMenuView.frame.origin.x = toVC.view.frame.width . - , .

, . print _ = toVC.view, . print(toVC.isViewLoaded) , , .