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我有一个自定义框架(.xcframework),我希望在其中一个函数UIAlertViewController中出现 a ,如果用户单击Continue,则继续执行该函数,否则如果点击 Cancel则从该函数返回。有UIAlertViewController时间限制,所以如果用户不与对话框交互,函数会自动返回。

这是我框架中的函数以及extension UIAlertViewController

extension UIAlertController {
    func presentInOwnWindow(animated: Bool, completion: (() -> Void)?) {
        let window = UIWindow(frame: UIScreen.main.bounds)
        window.rootViewController = UIViewController()
        window.windowLevel = .alert
        window.makeKeyAndVisible()
        window.rootViewController?.present(self, animated: animated, completion: completion)
    }
}

public enum ApiClientError: Error  {
    case timeout
    case userCancelled
}

public enum ApiClient {
    public static func get(showAlert: Bool = true) throws -> String {
        if showAlert {
            var didContinue = false
            let semaphore = DispatchSemaphore(value: 0)
            let alert = UIAlertController(title: "My Title", message: "My Message", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "Continue", style: .default, handler: { action in
                print("continue")
                didContinue = true
                semaphore.signal()
            }))
                
            alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { action in
                print("cancel")
                semaphore.signal()
            }))
    
            DispatchQueue.main.async {
                alert.presentInOwnWindow(animated: true, completion: nil)
            }

            if semaphore.wait(timeout: .now() + DispatchTimeInterval.seconds(10)) == .timedOut {
                alert.dismiss(animated: true)
                throw ApiClientError.timeout
            }
                
            if didContinue {
                return "Continue after alert"
            }
            else {
                throw ApiClientError.userCancelled
            }
        }
        else {
            return "Continue without alert"
        }
    } 
}

在引用框架的调用应用程序中,警报根本没有出现,我收到超时错误。

do {
    let result = ApiClient.get()
    print(result)
}
catch let error {
    print(error.localizedDescription)
}

尽管类似问题提供了一些技巧,但我已经在这方面工作了几天,但未能取得任何进展。

非常感谢

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0 回答 0