uialertcontroller

问题 I have a UITabBar with 5 tabs. When the middle tab is selected I want a UIAlertController Action Sheet to pop up, await user action and then load the new view once the user has selected from the Sheet since I need the data from the Sheet to load the view correctly. I currently have this code: extension CustomTabBarController: UITabBarControllerDelegate { func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool { guard let index =

问题 When I use UIAlertController with addTextField on iPad, the keyboard doesn't rotate properly from iOS10. It was working fine with iOS9, does anybody know the way to fix it? UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"title" message:nil preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction *done = [UIAlertAction actionWithTitle:NSLocalizedString(@"Done", nil) style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { UITextField *textField = alert

问题 I encountered a strange issue and maybe it is only a lack of knowledge about Swift 3.0 / iOS 10 so hopefully you can guide me into the right direction or explain to me what I'm doing wrong. HOW IT CURRENTLY WORKS I am trying to create a UIAlertController with style .alert so I can get a user text input for my app. My requirements are that the text must not be empty and if there was a text there before, it must be different. I can use the following code to achieve what I want: //This function

问题 I have a UIAlertController of .alert style with message text. I have inserted a UITextFiled in it with addTextField(.... and now I want a string of text below it. I assume I need a UILabel but how do I insert it? 回答1: A UIAlertController sub-classes from UIViewController . Because of this, a UIAlertController contains a view which can be modified. So, to add a label to the alert, you could do this: let label = UILabel(frame: CGRect(x: 0, y: 0, width: 50, height: 50)) label.text = "Text" alert

问题 I have a situation where I want to present a UIAlertController in order to wait for an event (asynchronous request for data from third party) to finish before showing my main ViewController to the user to interact with. Once the asynchronous code finishes, then I want to dismiss the UIAlertController . I know that normally UIAlertControllers are setup with a button to dismiss it, which is input from the user. I am wondering if what I want to do (dismiss with an event instead of user input) is

问题 I have created an overlay to run while I run an async data grab to the server so that users won't continue pressing buttons in the UI until the data grab is done. I have put the function into a global singleton class and I call it while passing in a bool to say whether or not I want to show or hide. I can get it to show but I cannot get it to hide. Here is the code: class DataModel { static let sharedInstance = DataModel() func accessNetworkData(vc: UIViewController, params: [String:Any],

问题 After I tap table cells, I am getting a delay of 4 to 5 seconds for the alert view to display. Below is the code func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){ let cell = tableView.cellForRow(at: indexPath)! let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .alert) let ok = UIAlertAction(title: "Ok", style: .default, handler: { (action) -> Void in let cell = tableView.cellForRow(at: indexPath)! }) let cancel = UIAlertAction(title

问题 In my app I try to get longitude and latitude from GPS. To do that I have to ask user about permission to access to his location. Before I do that I add to Info.plist this two rulees: Privacy - Location When In Use Usage Description and Privacy - Location Always Usage Description , then in AppDelegate I ask about permission doing it (SWIFT 3.0): if CLLocationManager.locationServicesEnabled() == true { let localisationManager = CLLocationManager() localisationManager

问题 I have a view controller from where I am launching an UIAlertController on click of a Button. Below is my code: - (IBAction)playOnlineURL:(UIButton *)sender { [self launchPlayURLAlert]; } - (void) launchPlayURLAlert{ NSString *defaultURLString = @“MY URL”; UIAlertController * alertController = [UIAlertController alertControllerWithTitle: @"Play Online URL" message: @"Enter the URL" preferredStyle:UIAlertControllerStyleAlert]; [alertController addTextFieldWithConfigurationHandler:^(UITextField

问题 I am working on a project which I had already released with iOS-7. But now as the action sheet is making problem so I am now implementing UIAlertController. Following is the code which I am using for showing UIAlertController with UIPicker. alertController = [UIAlertController alertControllerWithTitle:@"" message:@"" preferredStyle:UIAlertControllerStyleActionSheet]; UIAlertAction *alertAction = [UIAlertAction actionWithTitle:@"" style:UIAlertActionStyleDefault handler:nil]; [alertController