uialertcontroller

问题 How is it possible to get the handler of a UIAlertAction in Swift. It is set when initializing however I haven't found any property to get hold on the closure of the action. The closure is of type (UIAlertAction) -> Void however I would like to get the content of the closure so that I have some closure like () -> Void . Is this possible? Thanks for your answers 回答1: There is NO member/property exposed by the UIAlertAction class. However we can manage this by ourselves by subclassing

问题 How is it possible to get the handler of a UIAlertAction in Swift. It is set when initializing however I haven't found any property to get hold on the closure of the action. The closure is of type (UIAlertAction) -> Void however I would like to get the content of the closure so that I have some closure like () -> Void . Is this possible? Thanks for your answers 回答1: There is NO member/property exposed by the UIAlertAction class. However we can manage this by ourselves by subclassing

问题 I'm using AVAudioPlayer and want that the user can restart the playback once the loop is played back. For the user feedback I used UIAlertController but I still struggle to get the replay done with AVAudioPlayer. I want that the user can choose replay as often as he like until he choose NO. Here is my code I have so far, but what to do if the user select YES ... see comment in code below. // schedule the audio file [self->_playerNode scheduleFile:self->_file atTime:nil completionHandler:^{

问题 I'm not exactly sure if it's a bug or a feature, but this code: let sheet = UIAlertController(customView: awesomeView, preferredStyle: .actionSheet) .... present(sheet, animated: true, completion: nil) in pre-iOS 13 gives me this result: and on iOS 13: I.e. all the customview's elements have been grayscale. I've tried to play with Tint/Text/Background/... colors of the buttons / label - in iOS 13 is does no effect at all. In older versions - UI is changing. The goal: to avoid the grayscale

问题 This question already has answers here : Swift UIAlertController -> ActionSheet iPad iOS8 Crashes (8 answers) Closed 2 years ago . My app's crashing when trying to present a UIAlertController . I have a UIViewController that gets presented modally, then on that presented view controller when a certain button is tapped I want to present a actionSheet alert. Somehow the app crashes when doing this and I cannot figure it out why. Here's the code: let alertController = UIAlertController(title:

问题 I'm showing the 2 text values in UIAlertAction. I used the following code. UILabel.appearance(whenContainedInInstancesOf: [UIAlertController.self]).numberOfLines = 0 let actionSheetController = UIAlertController(title: nil, message: "Call", preferredStyle: .actionSheet) actionSheetController.view.tintColor = UIColor.red for key in phoneNumbers.keys { let phoneNumber = phoneNumbers[key] ?? "" let actionTitle = "\(key)\n\(phoneNumber)" let phoneNumberAction = UIAlertAction(title: actionTitle,

问题 I change title font and color like this: let titleAttributes = [NSAttributedStringKey.font: UIFont(name: "HelveticaNeue-Bold", size: 25)!, NSAttributedStringKey.foregroundColor: UIColor.purple] alert.setValue(titleString, forKey: "attributedTitle") Before iOS13 this worked fine both for preferredStyle .alert and .actionSheet. Now it only works for .alert and doesn't work for .actionSheet. Someone please any help? 回答1: iOS 13 now embeds the UIAlertController title in a UIVisualEffectView, and

问题 I have this code: func alertBox(txt: String){ let ac = UIAlertController(title: "MyTtle" , message: "More information in my website: ", preferredStyle: .alert) let ramkaNaObrazek = CGRect(origin: CGPoint(x: 10, y: 10), size: CGSize(width: 30, height: 30)) let ikonaAlertu = UIImageView(frame: ramkaNaObrazek) ikonaAlertu.image = UIImage(named: "modal_podpowiedz") ac.view.addSubview(ikonaAlertu) ac.addAction(UIAlertAction(title: "Ok" , style: .cancel, handler: { (action: UIAlertAction!) in }))

问题 I have a test connection action logic. it will test the server in live or not. the bug happens when the logic finishes the test and try display UIAlertController inside closure thread it will crash the systems. @IBAction func TestNetwork(_ sender: Any) { var message = "\(internetConnection) internet connection \n \(serverStatus) server\n " self.showSpinner(onView: self.view) DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) { self.testConnection(connectionTestCompletionHanlder:

问题 I have progress view in alert when downloading with alamofire, but the problem is that when I want to download the progress view in alert will start to be complete but flashing and the other problem is that the behind screen will start to be fade to black I think in every second a new alert with progress view will show and at the end there are lots of alerts how can I avoid them? downloadTimer = Timer.scheduledTimer(timeInterval: 1 , target: self, selector: #selector(flashingDownload),