invalidateDisplayList

控件刷新方法详解

最新推荐文章于 2025-08-09 11:20:09 发布

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#properties #list #layout #object

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本文详细介绍了用于一次性刷新控件属性和布局的方法，包括invalidateDisplayList、invalidateProperties、invalidateSize及validateNow。这些方法能够提高应用程序效率，避免多次单独刷新带来的性能损耗。

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