swift 4.2 ios 12中的状态栏模糊视图（半透明）

Question

我试图根据背景模糊状态栏，就像我们拉下状态栏时一样。就像是看穿了

        let statusBarFrame = UIApplication.shared.statusBarFrame
        let visualEffectView = UIVisualEffectView(effect: UIBlurEffect(style: .light))
        visualEffectView.frame = statusBarFrame
        view.addSubview(visualEffectView)

我尝试了所有样式，但它确实变成了半透明 即使我尝试在情节提要中显示情节提要效果，但在模拟器中却没有尝试，甚至我的 Reduce Transparency 也已打开

我想在状态栏中实现这一点

但它只给出一个白条

Answer 1

您可以通过以下代码获取您的状态栏视图，然后尝试添加到视觉效果，如here

     let statWindow = UIApplication.shared.value(forKey:"statusBarWindow") as! UIView
        let statusBar = statWindow.subviews[0] as UIView
        statusBar.backgroundColor = UIColor(red: 213 / 255.0, green: 0 / 255.0, blue: 0 / 255.0, alpha: 0.7)

或

extension UINavigationBar {
    func installBlurEffect() {
        isTranslucent = true
        setBackgroundImage(UIImage(), for: .default)
        let statusBarHeight: CGFloat = UIApplication.shared.statusBarFrame.height
        var blurFrame = bounds
        blurFrame.size.height += statusBarHeight
        blurFrame.origin.y -= statusBarHeight
        let blurView  = UIVisualEffectView(effect: UIBlurEffect(style: .light))
        blurView.isUserInteractionEnabled = false
        blurView.frame = blurFrame
        blurView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        addSubview(blurView)
        blurView.layer.zPosition = -1
    }
}

用法

navigationController?.navigationBar.installBlurEffect()