Question

我正在制作一个cocoa lib，我需要获取状态栏高度，我使用这段代码：

let statusBarHeight = UIApplication.shared.isStatusBarHidden ? CGFloat(0) : UIApplication.shared.statusBarFrame.height

我在另一个项目中使用lib，一切正常，但如果我在app扩展中使用Lib，我会获得：

'shared' is unavailable: Use view controller based solutions where appropriate instead

如何测试我是否在扩展内？或者如何在不使用共享的情况下获得状态高度？

谢谢！

Answer 1

如果您的目标是iOS 11，请使用视图控制器的topLayoutGuide.length或视图控制器的视图safeAreaInsets.top。这些值也会考虑任何导航栏。

Answer 2

我使用这个解决方案：

extension UIViewController{


/// Calculate top distance with "navigationBar" and "statusBar" by adding a
/// subview constraint to navigationBar or to topAnchor or superview
/// - Returns: The real distance between topViewController and Bottom navigationBar
func calculateTopDistance() -> CGFloat{

    /// Create view for misure
    let misureView : UIView     = UIView()
    misureView.backgroundColor  = .clear
    view.addSubview(misureView)

    /// Add needed constraint
    misureView.translatesAutoresizingMaskIntoConstraints                    = false
    misureView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive     = true
    misureView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive   = true
    misureView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
    if let nav = navigationController {
        misureView.topAnchor.constraint(equalTo: nav.navigationBar.bottomAnchor).isActive = true
    }else{
        misureView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
    }

    /// Force layout
    view.layoutIfNeeded()

    /// Calculate distance
    let distance = view.frame.size.height - misureView.frame.size.height

    /// Remove from superview
    misureView.removeFromSuperview()

    return distance

}

}

我写了一篇关于媒体的文章，在这里：

https://medium.com/@lucabecchetti/calculate-top-distance-status-bar-height-and-navigation-bar-height-of-uiviewcontroller-without-e4dbfe241a77

Answer 3

试试这个

let statusBarHeight = Util.statusBarHeight()

class Util: NSObject {
    class func statusBarHeight() -> CGFloat {
        return UIApplication.shared.isStatusBarHidden ? CGFloat(0) : 
         UIApplication.shared.statusBarFrame.height
   }
}

我总是按照上述方法访问全局UI元素，例如方向，状态栏高度等。

获取状态栏的大小而不使用UIApplication.shared

3 个答案: