如何在iOS中的状态栏中显示视图？

Question

我想在状态栏中显示应该对我的所有View Controller可见的视图

示例：我需要在状态栏中显示“无Internet连接”，并且在我们获得互联网连接后它会隐藏吗？

Answer 1

您可以将视图直接添加到状态栏：

// get the status bar
let statusBar = UIApplication.shared.value(forKey: "statusBarWindow") as? UIWindow

// create a subview & add it to the status bar
let subview = UIView(frame: CGRect(x: 20, y: 0, width: 20, height: 10))
subview.backgroundColor = .red
statusBar?.addSubview(subview)
statusBar?.bringSubview(toFront: subview)

如果您在全球范围内声明statusBar和noNetworkConnectionView，则可以从任意位置访问它以动态显示或隐藏它。

结果：

_{免责声明：我不确定Apple是否会批准以这种方式修改状态栏的应用程序。}

Answer 2

• 创建视图

  let statusView = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: 40))
  statusView.tag = 1101 //used to get view whenever required
  statusView.backgroundColor = UIColor.red.withAlphaComponent(0.6)
   //set other properties
  

• 在窗口显示视图

  //show on window, will be visible in all view controller
  UIApplication.shared.delegate?.window??.addSubview(statusView)
  UIApplication.shared.delegate?.window??.bringSubview(toFront: statusView)
  

• 隐藏视图

  //to hide that view
  UIApplication.shared.delegate?.window??.viewWithTag(1101)?.removeFromSuperview()