ios UIHostingView无法呈现已呈现的视图

pepwfjgg 于 2023-08-08 发布在 iOS

关注(0)|答案(1)|浏览(125)

我创建了自定义警报，但当我尝试在.sheet View上显示它时，出现了此错误-

2023-08-05 00：21：15.880778+0200 MyApp[759：72430] [演示]尝试<TtGC7SwiftUI19UIHostingControllerV6Events11CustomAlert: 0x108009600>在<TtGC7SwiftUI19UIHostingControllerGVS_15ModifiedContentVS_7AnyViewVS_12RootModifier_: 0x103022800>（来自<TtGC7SwiftUI19UIHostingControllerGVS_15ModifiedContentVS_7AnyViewVS_12RootModifier_: 0x103022800>）已在演示的内容上演示<TtGC7SwiftUI29PresentationHostingControllerVS_7AnyView: 0x10680a000>。

这是我的代码

extension View {
    func customAlert(args) -> some View {
        if let topController = UIApplication.shared.windows.first?.rootViewController {
           let alert = CustomAlert(args)
           let hostingController = UIHostingController(rootView: alert)
           hostingController.modalPresentationStyle = .overFullScreen
           hostingController.modalTransitionStyle = .crossDissolve
           hostingController.view.backgroundColor = .clear

           topController.present(hostingController, animated: false)
        }

        return self
     }
}

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我该怎么修呢？
请帮帮我！我现在不知道，为什么会发生：）

ios

来源：https://stackoverflow.com/questions/76839428/uihostingview-failed-to-present-view-which-already-presenting

1条答案

按热度按时间

n3h0vuf21#

.sheet修饰符在当前窗口的根视图控制器上显示一个视图控制器。当我们需要在已经呈现的视图控制器上呈现一个视图控制器时，我们可以使用UIViewController的presentedViewController属性来检查根视图控制器是否已经呈现了任何VC。

extension View {
    func customAlert(args) -> some View {
        if let topController = UIApplication.shared.windows.first?.rootViewController {
            let alert = CustomAlert(args)
            let hostingController = UIHostingController(rootView: alert)
            hostingController.modalPresentationStyle = .overFullScreen
            hostingController.modalTransitionStyle = .crossDissolve
            hostingController.view.backgroundColor = .clear
            
            // check if a VC is already presented modally
            if let presentedVC = topController.presentedViewController {
                presentedVC.present(hostingController, animated: false)
            } else {
                topController.present(hostingController, animated: false)
            }
        }
        
        return self
    }
}

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ios UIHostingView无法呈现已呈现的视图

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