invalidateDisplayList()

最新推荐文章于 2018-07-13 10:46:10 发布

xltank

最新推荐文章于 2018-07-13 10:46:10 发布

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本文介绍了控件的几种刷新方法，包括invalidateDisplayList、invalidateProperties、invalidateSize及validateNow等，这些方法能帮助开发者一次性刷新控件的显示列表、属性和尺寸，提高效率。

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当多次改变控件的某些属性（如高，宽，数据）后，调用该方法以便一次性的刷新相关属性和布局等。较之于一次一次的自动刷新，更有效率。

	Method		Defined By
		invalidateDisplayList (): void Calling this method results in a call to the component's validateDisplayList() method before the display list is rendered.	IInvalidating
		invalidateProperties (): void Calling this method results in a call to the component's validateProperties() method before the display list is rendered.	IInvalidating
		invalidateSize (): void Calling this method results in a call to the component's validateSize() method before the display list is rendered.	IInvalidating
		validateNow (): void Validates and updates the properties and layout of this object by immediately calling validateProperties(), validateSize(), and validateDisplayList(), if necessary.