3/18/2023 0 Comments Animations![]() ![]() This code animates the Image instance by scaling up to twice its size over 2 seconds (2000 milliseconds). The following code example demonstrates using the ScaleTo method to animate the Scale property of an Image: await image.ScaleTo (2, 2000) The following screenshots show the relative rotation in progress on each platform: Therefore, if a new animation is invoked while an animation is already in progress, it will start from the current position and may end at a position that is not an increment of 360 degrees. This ensures that each animation will always be a 360 degrees rotation from the starting position. The RelRotateTo method obtains the current Rotation property value for the start of the animation, and then rotates from that value to the value plus its first argument (360). This code animates the Image instance by rotating 360 degrees from its starting position over 2 seconds (2000 milliseconds). The following code example demonstrates using the RelRotateTo method to incrementally increase or decrease the Rotation property of an Image: await image.RelRotateTo (360, 2000) In addition to the RotateTo method, there are also RotateXTo and RotateYTo methods that animate the RotationX and RotationY properties, respectively. The following screenshots show the rotation in progress on each platform: This ensures that the Rotation property doesn't remain at 360 after the animation concludes, which would prevent additional rotations. Once the animation is complete, the image's Rotation property is reset to 0. The RotateTo method obtains the current Rotation property value for the start of the animation, and then rotates from that value to its first argument (360). This code animates the Image instance by rotating up to 360 degrees over 2 seconds (2000 milliseconds). ![]() The following code example demonstrates using the RotateTo method to animate the Rotation property of an Image: await image.RotateTo (360, 2000) This section explores each animation operation. Single AnimationsĮach extension method in the ViewExtensions implements a single animation operation that progressively changes a property from one value to another value over a period of time. For more information, see Composite Animations.įor more information about the await operator, see Async Support Overview. This operation can be taken advantage of when creating composite animations. In this scenario, the animation extension methods will quickly return after initiating the animation, with the animation occurring in the background. If there's a requirement to let an animation complete in the background, then the await operator can be omitted. For more information, see Compound Animations. ![]() In addition, it then becomes possible to create sequential animations with subsequent animation methods executing after the previous method has completed. Therefore, the animation methods should typically be used with the await operator, which makes it possible to easily determine when an animation has completed. The return value is false if the animation completes, and true if the animation is cancelled. The animation extension methods in the ViewExtensions class are all asynchronous and return a Task object. Therefore, it should only be used by Layout subclasses. However, this method is intended to be used by layouts to animate transitions between layout states that contain size and position changes. The ViewExtensions class provides a LayoutTo extension method. However, a duration for each animation can be specified when creating the animation.
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