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这是为什么呀？预览的时候根本弹不出图层，我还是跟着教程做的。
@AORIGHT 都加个等待0秒的动作在动作栏最前面试试，我猜是经典的点击按钮显示图层组后，点击的位置刚好在显示的图层组的关闭按钮上所以点到了关闭按钮导致图层组又被关掉了的问题，看起来像是没有效果，其实反而是都触发了效果才导致看上去没效果
