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    Xamarin.iOS view common animations
  
        
  
    
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  | 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 | |
| ); | |
| } | 
  
    
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  | 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 | |
| ); | |
| } | 
  
    
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  | 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 | |
| ); | |
| } | 
  
    
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  | 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 | |
| ); | |
| } | 
  
    
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  | 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 | |
| ); | |
| } | 
  
    
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  | 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 | |
| ); | |
| } | 
  
    
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  | 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 | |
| ); | |
| } | 
  
    
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  | 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 | |
| ); | |
| } | 
  
    
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  | //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) }, | |
| }; | 
  
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