Colors

Colors is a simple app that demonstrates how to use the View Controller Transitioning API to create a transition effect like the one found in the Apple Weather app.

Cool, tell me more.

O.K. The app uses a class that acts as a transitioning delegate and intercepts the default push transition animation between one view controller and another inside a UINavigationController. It then injects its own custom animation between those two view controllers and iOS does the rest.

How does it work?

The custom animation from the table view (TTColorsViewController) to the static view (TTColorViewController) is done by finding the cell that was selected either by a gesture or by table cell selection, and moving the other cells out of view.

Do the opposite when transitioning back to the table.

All the magic happens in TTVerticalSplitAnimationController.

How do I use it?

• Tap a random color and the transition plays through taking you from one view controller to another.
• Swipe left to right on any color to control the animation with your finger.
• Swipe right to left on the Color screen to transition back to the original place in the table.
• Swipe or don't swipe, its up to you.

Why can't I use a pinch gesture on the table?

Because I haven't implemented that yet. The swipe was a minimum amount of gesture-based movement needed to achieve the effect.