Custom modal transition

This transition supports both landscape and portrait modes and works on iOS 7 - iOS 8.2.

Cavets

• Controllers will not properly rotate if orientation changed when presented. There is only one exception, if presented controller is a navigation controller, then rotation works fine. Seems like UIKit bug.

• State restoration is possible but presented VC should restore transitioningDelegate, modalPresentationStyle and modalPresentationCapturesStatusBarAppearance. If you use storyboards then it's easy:

  - (void)encodeRestorableStateWithCoder:(NSCoder *)coder {
    [super encodeRestorableStateWithCoder:coder];
    
    [coder encodeInteger:self.modalPresentationStyle forKey:@"modalPresentationStyle"];
    [coder encodeInteger:self.modalPresentationCapturesStatusBarAppearance forKey:@"modalPresentationCapturesStatusBarAppearance"];
    [coder encodeObject:self.transitioningDelegate forKey:@"transitioningDelegate"];
  }
  
  - (void)decodeRestorableStateWithCoder:(NSCoder *)coder {
    [super decodeRestorableStateWithCoder:coder];
  	
    self.modalPresentationStyle = [coder decodeIntegerForKey:@"modalPresentationStyle"];
    self.modalPresentationCapturesStatusBarAppearance = [coder decodeIntegerForKey:@"modalPresentationCapturesStatusBarAppearance"];
    self.transitioningDelegate = [coder decodeObjectForKey:@"transitioningDelegate"];
  }

Blog post

This project is a part of my blog post. However lots of things changed since original blog post was published.

• Unwinding works fine if you fix segueForUnwindingToViewController in source navigation controller and create unwind segue using source view controller. Works for both iOS 7 and 8 (see http://stackoverflow.com/a/28607309/351305)
• Resetting views' frames to container bounds before adding them to container helps to solve issues with misplaced navigation bar and rotation issues on iOS 7.