uiviewcontroller

问题 I have updated my iPhone to iOS 7 today and recompile my app for it and all views in .xib files and on device are moved up and their upper part is hidden by the navigation bar. In my viewController I set self.edgesForExtendedLayout = UIRectEdgeNone; and on iOS 7 now everything looks good but when I compile my project with Deployment Target 6.0 and tested it on iOS 6 device all views are hidden by the navigation bar again.How can I make them to look consistently on iOS 7 and iOS 6

问题 It it possible to override the default view controller from a storyboard to show a different controller instead? This would all happen in the AppDelegate of course. 回答1: @Martol1ni I wanted to use your answer, but I also wanted to stay away from unnecessary storyboard clutter so I tweaked your code a bit. However I did give you a +1 for your inspiring answer. I put all of the following on the default controller. - (void)gotoScreen:(NSString *)theScreen { AppDelegate *app = (AppDelegate *)[

问题 I am trying to develop a Table View Controller,where rows are connected to multiple View Controllers (TextField,TextView,TableView,DatePicker,ImageView etc.). So if I click on any row,it should open the Intermediate View and place the appropriate controller in a common place where rest of the thing will be same for all controller.Suppose I clicked on a row where the index is mapped to TableView.When It will open the Intermediate Controller, It should placed the tableview in the common

问题 I work on a legacy application, and have found out, that my view[Will/Did]Disappear methods are not always fired properly. The case is, I have a (custom) UIViewController set as rootViewController in AppDelegate. This rootViewController has a UINavigationController , which has two view controllers pushed on it. When the user presses the home button, the user is logged out. When he later returns to the app, the application calls [UINavigationController popToRootViewControllerAnimated:YES] and

问题 I am buiding a Right to Left navigation controller to support RTL Languages. After reading some posts in StackOverFlow Push ViewController from Right To Left with UINavigationController, I decided that this method is most suitable: DetailedViewController *DVC = [[DetailedViewController alloc]initWithNibName:@"DetailedViewController" bundle:nil]; NSMutableArray *vcs = [NSMutableArray arrayWithArray:self.navigationController.viewControllers]; [vcs insertObject:DVC atIndex:[vcs count]-1]; [self

问题 In new iOS 6, viewDidUnload is deprecated and we have been instructed to use didReceiveMemoryWarning instead, to manage objects in UIViewController instances and subclasses. Is it equally effective to assign nils to UIView kinds inside didReceiveMemoryWarning like the way it has been done inside viewDidUnload ? I am asking this because these two methods seems to be working differently. It seems like didReceiveMemoryWarning doesn't guarantee viewDidLoad to be called again to re-instantiate any

问题 I am having a hard time understanding why you can put UIViews outside the UIViewController on the storyboard, and what the use case of it might be. For instance, on the storyboard I can add UIToolbar , UIAcitivtyIndicator and UIProgressView that is outside of the UIViewController . Is this mean there is a way for you to reference those Views that are outside UIViewController and potentially display them somehow either programmatically or embed those like you would do with a ContainerView ?

问题 I'm having a problem with my navigation controller. If I add a view controller to the stack: - (void) tui_ToggleListStudy:(id)sender { listVC = [[ListViewController alloc] init]; [self.navigationController pushViewController:listVC animated:NO]; [listVC release]; } I have NSLog messages for the view controller beneath, for both viewWillDisappear: and viewDidDisappear - but only viewWillDisappear: is getting called. Not only that, but the view controller doesn't receive any other delegate

问题 In my view controller: class FoodAddViewController: UIViewController, UIPickerViewDataSource, UITextFieldDelegate, UIPickerViewDelegate { let TAG = "FoodAddViewController" // Retreive the managedObjectContext from AppDelegate let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext @IBOutlet weak var foodName: UITextField! @IBOutlet weak var foodPortion: UITextField! @IBOutlet weak var foodCalories: UITextField! @IBOutlet weak var foodUnit:

问题 How can I get all the ViewControllers of my application at runtime? As far as I know self.navigationcontroller.viewControllers returns the NSArray of only those controllers which are on the navigation stack. But is there some way I can access all the my application's ViewControllers? 回答1: Hooking in on the answer of Umka. Without knowing exactly what you want to do, this might be totally overkill, but it might help you. You could subclass the UIViewController (e.g. the