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在我的代码中,每次用户移动鼠标来跟踪它时,我都会重新绘制一个矩形,但正如这里所说,.draw 方法不会删除该形状的旧绘图。
所以我的问题是,我如何删除旧图?有某种 .remove() 方法吗?
提前致谢,
iLinked