目标:在应用中创建模糊View。我使用的代码:funccreateBlurBackgroundView(){if!UIAccessibilityIsReduceTransparencyEnabled(){ifblurredSubView==nil||blurredSubView.superview==nil{print("Createblurredbackgroundview")self.backgroundColor=UIColor.clearColor()letblurEffect=UIBlurEffect(style:UIBlurEffectStyle.Light)blurred