On iOS，If we want to display a shadow View，So basically do：
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self.view.layer?.shadowColor = NSColor.black.cgColor self.view.layer?.shadowOpacity = 0.1 self.view.layer?.shadowOffset = CGSize(width: 0, height: 0) self.view.layer?.shadowRadius = 3 self.view.layer?.masksToBounds = false |
but，To the macOS，This would not work - no effect。
The answer lies in the macOS a View If you want to use [crayon-673fcaf[……]