iPhone X系列 的获取 - 安全区顶部和底部高度

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///1. 获得当前窗口 var JY_WINDOW: UIWindow? {     get{         if let app = UIApplication.shared.delegate as? AppDelegate {             return app.window         }         return nil     } }   //2. iPhoneX系列 var iphoneX_Series: Bool {     get {                   if UIDevice.current.userInterfaceIdiom != UIUserInterfaceIdiom.phone{             debugPrint("不是iPhone， 是 \(UIDevice.current.userInterfaceIdiom.rawValue)")         }                   if #available(iOS 11.0, *) {             if let bottom = JY_WINDOW?.safeAreaInsets.bottom , bottom > 0 {                 return true             }         } else {             debugPrint("iOS11 之前的版本")         }         return false     } }

　　

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安全区高度：         if #available(iOS 11.0, *) {              let  top = JY_WINDOW?.safeAreaInsets.top              let bottom = JY_WINDOW?.safeAreaInsets.bottom              let height = UIScreen.main.bounds.size.height - top - bottom         } else {             let height = UIScreen.main.bounds.size.height         }