ASDK animation example

final class SearchBarNode: ASCellNode.swift

    override func animateLayoutTransition(_ context: ASContextTransitioning) {
        
        if textNode.text == "" {
            
            let finalTextFrame = context.finalFrame(for: textNode)
            
            var finalButtonFrame = context.initialFrame(for: cancelButton)
            finalButtonFrame.origin.x = UIScreen.main.bounds.width
        
            UIView.animate(withDuration: 0.1, animations: {
                self.textNode.frame = finalTextFrame
                self.cancelButton.frame = finalButtonFrame
            }, completion: { finished in
                context.completeTransition(finished)
            })
        } else {
            
            let finalTextFrame = context.finalFrame(for: textNode)
            
            let finalButtonFrame = context.finalFrame(for: cancelButton)
            cancelButton.frame = finalButtonFrame
            
            let initialButtonFrame = context.initialFrame(for: cancelButton)
            if initialButtonFrame.isEmpty {
                cancelButton.frame.origin.x = UIScreen.main.bounds.width
            }
            
            UIView.animate(withDuration: 0.1, animations: {
                self.textNode.frame = finalTextFrame
                self.cancelButton.frame = finalButtonFrame
            }, completion: { finished in
                context.completeTransition(finished)
            })
        }
    }