If you don't change the insets, no image at all will be visible.
如果没有更改insets,那么就看不见任何图像。
You need to add an tag to increase the insets so the image can be painted in them.
您需要添加一个标签来增加insets,以便在其中画出图像。
If you subtract the insets from the screen size, you have the size your window should be.
如果从屏幕大小中减去那些insets,您就得到了窗口的应有大小。
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