最合适的方法是什么来获得不安全区域的顶部和底部高度?


当前回答

这里的其他答案对我都没用,但这个对我有用。

var topSafeAreaHeight: CGFloat = 0
var bottomSafeAreaHeight: CGFloat = 0

  if #available(iOS 11.0, *) {
    let window = UIApplication.shared.windows[0]
    let safeFrame = window.safeAreaLayoutGuide.layoutFrame
    topSafeAreaHeight = safeFrame.minY
    bottomSafeAreaHeight = window.frame.maxY - safeFrame.maxY
  }

其他回答

UIWindow *window = [[[UIApplication sharedApplication] delegate] window]; 
CGFloat fBottomPadding = window.safeAreaInsets.bottom;

这适用于整个视图生命周期,在Swift中是一个简单的两行解决方案:

let top    = UIApplication.shared.windows[0].safeAreaInsets.top
let bottom = UIApplication.shared.windows[0].safeAreaInsets.bottom

我个人需要它在viewDidLoad和view中。safeAreaInsets还没有计算。

要获得布局参考线之间的高度,只需这样做

let guide = view.safeAreaLayoutGuide
let height = guide.layoutFrame.size.height

所以全帧高度= 812.0,安全区高度= 734.0

下面的例子中,绿色视图的框架为guide.layoutFrame

或者使用SwiftUI GeometryReader api。

struct V: View {
    var body: some View {
        GeometryReader { geometry in
            Text("\(geometry.safeAreaInsets.top)")
            Text("\(geometry.safeAreaInsets.bottom)")
        }
    }
}


代码可能不起作用,但却说明了这个想法。

extension UIViewController {
    var topbarHeight: CGFloat {
        return
            (view.window?.safeAreaInsets.top ?? 0) +
            (view.window?.windowScene?.statusBarManager?.statusBarFrame.height ?? 0.0) +
            (self.navigationController?.navigationBar.frame.height ?? 0.0)
    }
}