范例动画会定期变更为不同的背景笔刷。

The example animation changes to a different background brush at regular intervals.

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例如，您可以建立用来绘制按钮背景的笔刷不透明度动画。

For example, you could animate the opacity of a brush used to paint a button's background.

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例如，您可以建立用来绘制按钮背景的笔刷不透明度动画。

For example, you could animate the opacity of a brush used to paint a button's background.

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