Xamarin.iOS view common animations

Animation Fade

public static void Fade (this UIView view, bool isIn, double duration = 0.3, Action onFinished = null)
{
	var minAlpha = (nfloat)0.0f;
	var maxAlpha = (nfloat)1.0f;

	view.Alpha = isIn ? minAlpha : maxAlpha;
	view.Transform = CGAffineTransform.MakeIdentity ();
	UIView.Animate (duration, 0, UIViewAnimationOptions.CurveEaseInOut,
		() => {
			view.Alpha = isIn ? maxAlpha : minAlpha;
		},
		onFinished
	);
}

Animation Flip horizontaly

public static void FlipHorizontaly (this UIView view, bool isIn, double duration = 0.3, Action onFinished = null)
		{
			var m34 = (nfloat)(-1 * 0.001);

			var minAlpha = (nfloat)0.0f;
			var maxAlpha = (nfloat)1.0f;

			view.Alpha = (nfloat)1.0;

			var minTransform = CATransform3D.Identity;
			minTransform.m34 = m34;
			minTransform = minTransform.Rotate ((nfloat)((isIn ? 1 : -1) * Math.PI * 0.5), (nfloat)0.0f, (nfloat)1.0f, (nfloat)0.0f);
			var maxTransform = CATransform3D.Identity;
			maxTransform.m34 = m34;

			view.Alpha = isIn ? minAlpha : maxAlpha;
			view.Layer.Transform = isIn ? minTransform : maxTransform;
			UIView.Animate (duration, 0, UIViewAnimationOptions.CurveEaseInOut,
				() => {
					view.Layer.AnchorPoint = new CGPoint ((nfloat)0.5, (nfloat)0.5f);
					view.Layer.Transform = isIn ? maxTransform : minTransform;
					view.Alpha = isIn ? maxAlpha : minAlpha;
				},
				onFinished
			);
		}

Animation Flip verticaly

		public static void FlipVerticaly (this UIView view, bool isIn, double duration = 0.3, Action onFinished = null)
		{
			var m34 = (nfloat)(-1 * 0.001);

			var minAlpha = (nfloat)0.0f;
			var maxAlpha = (nfloat)1.0f;

			var minTransform = CATransform3D.Identity;
			minTransform.m34 = m34;
			minTransform = minTransform.Rotate ((nfloat)((isIn ? 1 : -1) * Math.PI * 0.5), (nfloat)1.0f, (nfloat)0.0f, (nfloat)0.0f);
			var maxTransform = CATransform3D.Identity;
			maxTransform.m34 = m34;

			view.Alpha = isIn ? minAlpha : maxAlpha;
			view.Layer.Transform = isIn ? minTransform : maxTransform;
			UIView.Animate (duration, 0, UIViewAnimationOptions.CurveEaseInOut,
				() => {
					view.Layer.AnchorPoint = new CGPoint ((nfloat)0.5, (nfloat)0.5f);
					view.Layer.Transform = isIn ? maxTransform : minTransform;
					view.Alpha = isIn ? maxAlpha : minAlpha;
				},
				onFinished
			);
		}

Animation Rotate

public static void Rotate (this UIView view, bool isIn, bool fromLeft = true, double duration = 0.3, Action onFinished = null)
{
	var minAlpha = (nfloat)0.0f;
	var maxAlpha = (nfloat)1.0f;
	var minTransform = CGAffineTransform.MakeRotation ((nfloat)((fromLeft ? -1 : 1) * 720));
	var maxTransform = CGAffineTransform.MakeRotation ((nfloat)0.0);

	view.Alpha = isIn ? minAlpha : maxAlpha;
	view.Transform = isIn ? minTransform : maxTransform;
	UIView.Animate (duration, 0, UIViewAnimationOptions.CurveEaseInOut,
		() => {
			view.Alpha = isIn ? maxAlpha : minAlpha;
			view.Transform = isIn ? maxTransform : minTransform;
		},
		onFinished
	);
}

Animation Scale

public static void Scale (this UIView view, bool isIn, double duration = 0.3, Action onFinished = null)
{
	var minAlpha = (nfloat)0.0f;
	var maxAlpha = (nfloat)1.0f;
	var minTransform = CGAffineTransform.MakeScale ((nfloat)0.1, (nfloat)0.1);
	var maxTransform = CGAffineTransform.MakeScale ((nfloat)1, (nfloat)1);

	view.Alpha = isIn ? minAlpha : maxAlpha;
	view.Transform = isIn ? minTransform : maxTransform;
	UIView.Animate (duration, 0, UIViewAnimationOptions.CurveEaseInOut,
		() => {
			view.Alpha = isIn ? maxAlpha : minAlpha;
			view.Transform = isIn ? maxTransform : minTransform;
		},
		onFinished
	);
}

Animation Slide horizontaly

public static void SlideHorizontaly (this UIView view, bool isIn, bool fromLeft, double duration = 0.3, Action onFinished = null)
{
	var minAlpha = (nfloat)0.0f;
	var maxAlpha = (nfloat)1.0f;
	var minTransform = CGAffineTransform.MakeTranslation ((fromLeft ? -1 : 1) * view.Bounds.Width, 0);
	var maxTransform = CGAffineTransform.MakeIdentity ();

	view.Alpha = isIn ? minAlpha : maxAlpha;
	view.Transform = isIn ? minTransform : maxTransform;
	UIView.Animate (duration, 0, UIViewAnimationOptions.CurveEaseInOut,
		() => {
			view.Alpha = isIn ? maxAlpha : minAlpha;
			view.Transform = isIn ? maxTransform : minTransform;
		},
		onFinished
	);
}

Animation Slide verticaly

public static void SlideVerticaly (this UIView view, bool isIn, bool fromTop, double duration = 0.3, Action onFinished = null)
{
	var minAlpha = (nfloat)0.0f;
	var maxAlpha = (nfloat)1.0f;
	var minTransform = CGAffineTransform.MakeTranslation (0, (fromTop ? -1 : 1) * view.Bounds.Height);
	var maxTransform = CGAffineTransform.MakeIdentity ();

	view.Alpha = isIn ? minAlpha : maxAlpha;
	view.Transform = isIn ? minTransform : maxTransform;
	UIView.Animate (duration, 0, UIViewAnimationOptions.CurveEaseInOut,
		() => {
			view.Alpha = isIn ? maxAlpha : minAlpha;
			view.Transform = isIn ? maxTransform : minTransform;
		},
		onFinished
	);
}

Animation Zoom

public static void Zoom (this UIView view, bool isIn, double duration = 0.3, Action onFinished = null)
{
	var minAlpha = (nfloat)0.0f;
	var maxAlpha = (nfloat)1.0f;
	var minTransform = CGAffineTransform.MakeScale ((nfloat)2.0, (nfloat)2.0);
	var maxTransform = CGAffineTransform.MakeScale ((nfloat)1, (nfloat)1);

	view.Alpha = isIn ? minAlpha : maxAlpha;
	view.Transform = isIn ? minTransform : maxTransform;
	UIView.Animate (duration, 0, UIViewAnimationOptions.CurveEaseInOut,
		() => {
			view.Alpha = isIn ? maxAlpha : minAlpha;
			view.Transform = isIn ? maxTransform : minTransform;
		},
		onFinished
	);
}

Xamarin.iOS Animations

//Some examples from below animation gists

this.view = new UIView (new CGRect (50, 50, 70, 100));
this.view.BackgroundColor = UIColor.Red;
this.View.AddSubview (this.view);

this.animations = new Dictionary<string, Action> () {
	{ "FadeIn", () => view.Fade (true) },
	{ "FadeOut", () => view.Fade (false) },
	{ "RotateIn", () => view.Rotate (true) },
	{ "RotateOut", () => view.Rotate (false) },
	{ "FlipInVerticaly", () => view.FlipVerticaly (true) },
	{ "FlipOutVerticaly", () => view.FlipVerticaly (false) },
	{ "FlipInHorizontaly", () => view.FlipHorizontaly (true) },
	{ "FlipOutHorizontaly", () => view.FlipHorizontaly (false) },
	{ "SlideInFromTop", () => view.SlideVerticaly (true, true) },
	{ "SlideInFromBottom", () => view.SlideVerticaly (true, false) },
	{ "SlideInFromLeft", () => view.SlideHorizontaly (true, true) },
	{ "SlideInFromRight", () => view.SlideHorizontaly (true, false) },
	{ "SlideOutFromTop", () => view.SlideVerticaly (false, true) },
	{ "SlideOutFromBottom", () => view.SlideVerticaly (false, false) },
	{ "SlideOutFromLeft", () => view.SlideHorizontaly (false, true) },
	{ "SlideOutFromRight", () => view.SlideHorizontaly (false, false) },
	{ "ZoomIn", () => view.Zoom (true) },
	{ "ZoomOut", () => view.Zoom (false) },
	{ "ScaleIn", () => view.Scale (true) },
	{ "ScaleOut", () => view.Scale (false) },
};

Excellent!

How to use/activate?

Thank you for sharing this