NativeScript/tests/app/navigation/custom-transition.ios.ts

import * as transition from "tns-core-modules/ui/transition";

export class CustomTransition extends transition.Transition {
    constructor(duration: number, curve: any) {
        super(duration, curve);
    }

    public animateIOSTransition(containerView: UIView, fromView: UIView, toView: UIView, operation: UINavigationControllerOperation, completion: (finished: boolean) => void): void {
        toView.transform = CGAffineTransformMakeScale(0, 0);
        fromView.transform = CGAffineTransformIdentity;

        switch (operation) {
            case UINavigationControllerOperation.Push:
                containerView.insertSubviewAboveSubview(toView, fromView);
                break;
            case UINavigationControllerOperation.Pop:
                containerView.insertSubviewBelowSubview(toView, fromView);
                break;
        }

        var duration = this.getDuration();
        var curve = this.getCurve();
        UIView.animateWithDurationAnimationsCompletion(duration, () => {
            UIView.setAnimationCurve(curve);
            toView.transform = CGAffineTransformIdentity;
            fromView.transform = CGAffineTransformMakeScale(0, 0);
        }, completion);
    }
}