Click and reveal-square 显示隐藏工具
I know how to have a square click area.
我知道如何有一个方形的点击区域。
Now it's pretty obvious that I can't use square click areas for that because I'd have overlapping click areas.
现在很明显,我不能使用方形点击区域,因为我会有重叠的点击区域。
To test that the Os work, click Play o and select a corner square as in Figure 7.
为了测试o能够运作,点击Play O按钮,然后选择一个角上的方格,如图7所示。
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