在 Swift 中显示父控制器的导航栏时，在另一个控制器上方显示具有透明视图的模态视图控制器

Question

我想显示一个具有透明背景的模态视图控制器，它内部有一个小视图，它将显示为警报。我想在导航堆栈中的另一个视图控制器上方显示相同的内容。我尝试以多种方式展示我的第二个控制器，例如嵌入导航控制器、导航控制器、第二个视图控制器本身等。但是其中任何一个都不会给我与父控制器相同的导航栏。我尝试将其添加为子视图，但是没有调用我的文本字段委托方法。谁能帮我解决这个问题。添加一些我尝试过的解决方案，这些解决方案是从不同的堆栈溢出答案中获得的。 1.

guard let alertController = /* my controller */ else { return }
let navController = UINavigationController(rootViewController: alertController)
alertController.delegate = self
alertController.valueText = "Value"
alertController.userPhoneNumber = updatedUserPhoneNumber
navController.modalTransitionStyle = .crossDissolve
navController.modalPresentationStyle = .currentContext
present(navController, animated: false, completion: nil)

2.

guard let alertController = /* my controller */ else { return }
alertController.delegate = self
alertController.valueText = "Value"
alertController.userPhoneNumber = updatedUserPhoneNumber
alertController.modalTransitionStyle = .crossDissolve
alertController.modalPresentationStyle = .currentContext
navigationController.present(alertController, animated: false, completion: nil)

3.

guard let alertController = /* my controller */ else { return }
let navController = UINavigationController(rootViewController: alertController)
alertController.delegate = self
alertController.valueText = "Value"
alertController.userPhoneNumber = updatedUserPhoneNumber
navController.modalTransitionStyle = .crossDissolve
navController.modalPresentationStyle = .currentContext
navigationController.present(navController, animated: false, completion: nil)

4.

guard let alertController = /* my controller */ else { return }
alertController.delegate = self
alertController.valueText = "Value"
alertController.userPhoneNumber = updatedUserPhoneNumber
alertController.modalTransitionStyle = .crossDissolve
alertController.modalPresentationStyle = .currentContext
present(alertController, animated: false, completion: nil)

非常感谢您提前...

Answer 1

我不知道如何呈现第二个控制器的视图。但最后我只将它添加为子视图。我的工作方式如下所示

https://developer.apple.com/library/archive/featuredarticles/ViewControllerPGforiPhoneOS/ImplementingaContainerViewController.html

addChild(alertController) view.addSubview(alertController.view) alertController.didMove(toParent: self)

并删除相同的喜欢

willMove(toParent: nil) view.removeFromSuperview() removeFromParent()

如果任何其他解决方案有效，请告诉我。

Answer 2

我在这样的项目中做到了：

let controllerToPresent = UIViewController()
controllerToPresent.providesPresentationContextTransitionStyle = true
controllerToPresent.definesPresentationContext = true
controllerToPresent.modalPresentationStyle = .overCurrentContext
controllerToPresent.view.backgroundColor = UIColor.init(white: 0.4, alpha: 0.8)
navigationController.visibleViewController?.present(controllerToPresent, animated: true)
// OR
navigationController.present(controllerToPresent, animated: true)

希望对你有帮助。