在容器的背景中使用单色(比如导航条中的黑色背景)可以在某种程度上缓解这个问题。

Some of this is overcome by using pure color in the background of containers, such as the black background of the navigation bar.

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注意，这些滚动条仅出现在扩展 Container 类的容器上。

Note that these scroll bars appear only for those containers that extend the Container class.

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如果由于滚动条的原因使子元素不能显示在容器的可见区域内，那么它仍然存在内容面板中。

If a child isn't visible in the container's visible area due to scroll bars, it still exists in the content pane.

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