Open paper animation in iOS using Core animation

Question

How to achieve this iOS 7 paper folding animation using CALayer. Thanks in advance.

Answer 1

If you want t achieve an effect like that you should start to learn about CALayers in particular this subclass CATransformLayer and its property -sublayerTransform.

CATransformLayer objects are used to create true 3D layer hierarchies, rather than the flattened hierarchy rendering model used by other CALayer classes.

Unlike normal layers, transform layers do not flatten their sublayers into the plane at Z=0.

This is a good starting point Create a fold animation.