CODEWITHSUNDEEP
iphoneuiviewcontrollertransition
Satyam
Satyam

Reputation: 15894

iPhone - presentModalViewController with transition from right

I'm using presentModalView controller and pushing the transition to new view via its controller. And I'm using following code to do the transition (which is working fine)

    [self presentModalViewController:myViewController animated:NO];
CATransition *animation = [CATransition animation];
[animation setDuration:0.5];
[animation setType:kCATransitionPush];
[animation setSubtype:kCATransitionFromRight];
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
[[myViewController.view layer] addAnimation:animation forKey:@"SwitchToView"];

but the problem is that, its showing blank white screen and then transition starts. How to avoid this?

Upvotes: 1

Views: 4823

Answers (3)

Vassily
Vassily

Reputation: 915

I think, uiviewcontroller.transitioningDelegate is the way to do it on iOS7 ans 8 : 

//Mark : Custom Transitionning for modal
func presentViewController(viewControllerToPresent: UIViewController, animated flag: Bool, fromRight:Bool , completion: (() -> Void)?) {
    if fromRight
    {
        viewControllerToPresent.modalPresentationStyle = UIModalPresentationStyle.FullScreen
        viewControllerToPresent.transitioningDelegate = self;
        self.presentViewController(viewControllerToPresent, animated: true, completion: completion);
    }
    else
    {
        self.presentViewController(viewControllerToPresent, animated: true, completion: completion)
    }
}


//MARK : Transitioning Delegate
func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
    return self;
}

func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
    return self;
}

func transitionDuration(transitionContext: UIViewControllerContextTransitioning) -> NSTimeInterval {
    return 0.4;
}

func animateTransition(transitionContext: UIViewControllerContextTransitioning) {

    let toViewController = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)!
    let fromViewController = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)!
    let toView = toViewController.viewForTransitionContext(transitionContext)
    let fromView = fromViewController.viewForTransitionContext(transitionContext)
    let containerView = transitionContext.containerView()
    let duration = self.transitionDuration(transitionContext);

    let initialFrame = transitionContext.initialFrameForViewController(fromViewController)
    var offsetRect = initialFrame
    offsetRect.origin.x += CGRectGetWidth(initialFrame);

    //Present
    if toViewController.isBeingPresented()
    {
        // init state before animation
        toView.frame = offsetRect;
        containerView.addSubview(toView);
        // then animate
        UIView.animateWithDuration(duration, animations: { () -> Void in
            toView.frame = initialFrame;
            }, completion: { (finished) -> Void in
                transitionContext.completeTransition(!transitionContext.transitionWasCancelled())
        })

    }
    //Dismiss
    else
    {
        // init state before animation
        containerView.addSubview(toView)
        containerView.sendSubviewToBack(toView)
        // then animate
        UIView.animateWithDuration(duration, animations: { () -> Void in
            fromView.frame = offsetRect
            }, completion: { (finished) -> Void in
                fromView.removeFromSuperview()
                transitionContext.completeTransition(!transitionContext.transitionWasCancelled())
        })
    }
}

Upvotes: 0

Agustin Estevez
Agustin Estevez

Reputation: 21

As this wasn't answered, I'll post what worked for me, to allow future seekers to find something useful:

I was trying to display a view in a different XIB file with a CATransition and always got a black screen at the beginning.

The solution was to replace these lines 

[[myViewController.view layer];
addAnimation:animation forKey:@"SwitchToView"];

with 

[[self.view.superview layer] addAnimation:animation forKey:@"SwitchToView"];

After finding the issue, it was quite easy to understand, because obviously the local window is the one you want to "push".

Upvotes: 2

Vijay-Apple-Dev.blogspot.com
Vijay-Apple-Dev.blogspot.com

Reputation: 25692

first add animation then present

CATransition *animation = [CATransition animation];
[animation setDuration:0.5];
[animation setType:kCATransitionPush];
[animation setSubtype:kCATransitionFromRight];
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
[[myViewController.view layer] addAnimation:animation forKey:@"SwitchToView"];  


[self presentModalViewController:myViewController animated:NO];

Upvotes: 4

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