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• popViewController does not autorotate back to allowed orientation

  - by JoeGaggler

  I have two UIViewControllers, "A" and "B", where "A" overrides the shouldAutorotateToInterfaceOrientation to return YES for UIInterfaceOrientationPortrait, and "B" returns YES for all orientations. In my example "A" is the root navigation view controller, and I then use pushViewController for "B". After that I rotate the device into landscape, which successfully autorotates "B", then I pop "B" (back button or via popViewController) to return to "A". When targetting iPhone OS 3.1.3, "A" returns to the portrait orientation as expected. When targetting iPhone OS 3.2, I have two side-effects: "A" is displayed in landscape. The navigation bar does not update even though "A" is now displayed. The navigation bar still shows the items for "B". Only after trying to go back/pop one more time will the navigation bar animate to show the items for "A". If I instead attempt to push "B" again and go back, I have to pop twice before the navigation bar animates to show the items for "A". During these "intermediate pops" the view for "A" remains displayed. While researching this issue, I have seen other answers suggesting performing the rotation manually ([UIDevice setOrientation] or via a tranformation), however this does not help understand what the problem is, especially why it behaves differently between the two OS's. So my question is: must all of my UIViewControllers on the UINavigationController stack support exactly the same orientations going forward? And if not, then is there something that I need to do to make it behave as it did for OS 3.1.3?

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• UINavigationController leak/understanding popViewController

  - by Kamchatka

  Hello, I have a navigation controller and a table view. When someone click on the table view, I do the following: MyViewController *myViewController = [[MyViewController alloc] initWithImage:image]; [image release]; [self.navigationController pushViewController:myViewController animated:YES]; [myViewController release]; myViewController will retain the image. Now, if I go back and forth in the NavigationController, I get a leak because a new MyViewController gets created each time and apparently the popViewController doesn't release the myViewController. My question: Why doesn't popViewController release the controller? How should I handle that? Put the myViewController as a member of my class and check if it already exists instead of creating it each time? Thanks in advance for your help,

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• Application crashes while [self.view popViewController animated:YES]

  - by user128647

  application get crashed while invoking [self.view popViewController animated:YES], any reason why this happens ?????

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• How to popViewController from button click of custom UITableViewCell

  - by Chi Rod

  I have a button in a custom UITableViewCell. Its UITableView is controlled by a UIViewController. I would like to return to the RootView when that button is clicked. I am trying to use [self.superview.navigationController popViewControllerAnimated:YES]; in the target Action of the button, which is in the UITableViewCell.m file. However, it doesn't recognize "navigationController" because it is not in the stack. How can I return to the RootView when that button is clicked?

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• I need to refresh the content of a view as soon as I popViewController

  - by Harry Pham

  ViewA load some data from Coredata, then push to the next viewB. In viewB, there are some function, that will change the content of viewA (meaning viewB change the content of core data). However, when I pop the view back to viewA, my content stay the same as before. How can I fix this?

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• popView from UITabBarController inside UINavigationController

  - by Manu

  Hi, I'm building an application based on the Utility template from Xcode, to which I have added some more views. My application structure would be as follows: MainView (the app menu) Flip-side view (a calculator) UINavigationController Settings view viewDiDLoad: UITabBarController - Tab1 view (options) - Tab2 view (information text) I can navigate correctly from my MainView to my Flip-side view, which is also the root view of the Navigation Controller. From my Flip-side view, I push a second view of my Navigation Controller (Settings view) that is configured to show an UITabBarController, with two tabs, as soon as it loads (with viewDidLoad). If I remove the UITabBarController, I can return with no problems to my Flip-side view using "popViewController" from my Settings view. The problem comes if I load the UITabBarController in viewDiDLoad in my Settings view... the tabs work perfectly, but I'm not able to return to my Flip-side view (root view of the Navigation Controller) anymore. I CAN return if I use the Navigation Bar of the Navigation Controller, but I want to configure my own buttons and have the Navigation Bar hidden. So far I've tried the following methods: [self.navigationController popViewControllerAnimated:YES]; [self.navigationController popToRootViewControllerAnimated:YES]; [self.navigationController popToViewController:FlipSideViewController animated:YES]; But they don't seem to work. The first two just do nothing (the screen remains as it was), and the third one does not recognize the "FlipsideViewController" (maybe because it's a delegate of the MainViewController?). Is there a way to check what is exactly doing the "back" button of the Navigation Bar if I activate it? Should I be using delegates? Can I call a popViewController method in my Settings view from any of the two Tab views? This is my Flip-side view: - (IBAction)showSettingsView { SettingsViewController *controller = [[SettingsViewController alloc] initWithNibName:@"SettingsView" bundle:nil]; controller.title = @"Settings"; [self.navigationController pushViewController:controller animated:YES]; [controller release]; } This is my Settings view: - (void)viewDidLoad { [super viewDidLoad]; tabBarController = [[UITabBarController alloc] init]; Tab1ViewController* vc1 = [[Tab1ViewController alloc] init]; Tab2ViewController* vc2 = [[Tab2ViewController alloc] init]; NSArray* controllers = [NSArray arrayWithObjects:vc1, vc2, nil]; tabBarController.viewControllers = controllers; [self.view addSubview:tabBarController.view]; } And the method to return in one of the Tab views: - (IBAction)backFromTab1View { [self.navigationController popToViewController:FlipSideViewController animated:YES]; } Thanks very much and sorry if the question is too basic!

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• UITabBarController rotation problem with popViewControllerAnimated and selectedIndex (iPhone SDK)

  - by rjobidon

  Hi! This is a very important auto rotate issue and easy to reproduce. My application has a UITabBarController. Each tab is a UINavigationController. Auto rotation is handled with normal calls to shouldAutorotateToInterfaceOrientation and didRotateFromInterfaceOrientation. The interface rotates normally until I call UIViewController.popViewControllerAnimated and change UITabBarController.selectedIndex. Steps to reproduce: Create a demo Tab Bar Application. Add the following code to the App Delegate .h file: #import <UIKit/UIKit.h> @interface TestRotationAppDelegate : NSObject { UIWindow *window; UITabBarController *tabBarController; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet UITabBarController *tabBarController; -(void)doAction; @end // Redefine the interface to cach rotation messages @interface UITabBarController (TestRotation1AppDelegate) @end Add the following code to the App Delegate .m file: #import "TestRotationAppDelegate.h" @implementation TestRotationAppDelegate @synthesize window; @synthesize tabBarController; -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [window addSubview:tabBarController.view]; [window makeKeyAndVisible]; return YES; } -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; } -(void)dealloc { [tabBarController release]; [window release]; [super dealloc]; } @end @implementation UITabBarController (TestRotation1AppDelegate) -(void)viewDidLoad { [super viewDidLoad]; // Add a third tab and push a view UIViewController *view1 = [[UIViewController alloc] init]; view1.title = @"Third"; UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:view1]; NSMutableArray *array = [[NSMutableArray alloc] init]; [array addObjectsFromArray:self.viewControllers]; [array addObject:nav]; self.viewControllers = array; // Push view2 inside the third tab UIViewController *view2 = [[UIViewController alloc] init]; [nav pushViewController:view2 animated:YES]; // Create a button to pop view2 UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; button.frame = CGRectMake(50, 50, 220, 38); [button setTitle:@"Pop this view" forState:UIControlStateNormal]; [button addTarget:self action:@selector(doAction) forControlEvents:UIControlEventTouchUpInside]; [view2.view addSubview:button]; } -(void) doAction { // ROTATION PROBLEM BEGINS HERE // Remove one line of code and the problem doesn't occur. [self.selectedViewController popViewControllerAnimated:YES]; self.selectedIndex = 0; } -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; } @end The interface auto rotates normally until you tap the button on tab #3. Your help will be geatly appreciated!

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• UITableViewController not redrawing new cell text label after popViewControllerAnimated

  - by crunchyt

  I have a problemetic UITableViewController fails to redraw an updated cell after a child view is removed. Here's what's happening. After changing data in a child view, the parent view controller reloads the source data array and runs [tableView reloadData] via a PostNotification. After this triggers, I use popViewControllerAnimated to return to the parent UITableViewController (this pops the child view off the stack, and reveals the controller one level up). However, my updated data does not appear in the parent view controller! According to the debugger, the cell's label has been updated, but the visible label does not change. However, if I scroll-flick the table, momentarily moving the updated cell out of view, when it reappears the label is updated! I also try calling [tableView reloadData] via viewWillAppear but the issue still persists. Here is some additional info that may be helpful. I have a 3 views structured like this: 1/ SettingsViewController : UITableViewController 2/ -- UserView : UITableViewController 3/ ---- UserDetailsView : UIViewController <UIActionSheetDelegate> I am calling UserDetailsView from inside UserView as follows: UserDetailsView *userDetailsView = [[UserDetailsView alloc] init]; [self.navigationController pushViewController:userDetailsView animated:YES]; If I return to the top-most controller (SettingsViewController) and then load the problematic controller (UserView), everything is drawn correctly. It is only when returning from a child view that this issue occurs. Thank you in advance for your suggestions.

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• popViewControllerAnimated from back buttton

  - by Goods

  How can I popview from back button pressed, i passed the below code from previous view controller. Thanks self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleBordered target:nil action:nil];

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• TabBarController rotation problem with popViewControllerAnimated and selectedIndex

  - by rjobidon

  Hi! This is a very important auto rotate issue and easy to reproduce. My application has a UITabBarController. Each tab is a UINavigationController. Auto rotation is handled with normal calls to shouldAutorotateToInterfaceOrientation and didRotateFromInterfaceOrientation. The interface rotates normally until I call UIViewController.popViewControllerAnimated and change UITabBarController.selectedIndex. Steps to reproduce: Create a demo Tab Bar Application. Add the following code to the App Delegate .h file: #import <UIKit/UIKit.h> @interface TestRotation2AppDelegate : NSObject { UIWindow *window; UITabBarController *tabBarController; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet UITabBarController *tabBarController; (void)doAction; @end // Redefine the interface to cach rotation messages @interface UITabBarController (TestRotation1AppDelegate) @end Add the following code to the App Delegate .m file: #import "TestRotation2AppDelegate.h" @implementation TestRotation2AppDelegate @synthesize window; @synthesize tabBarController; - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [window addSubview:tabBarController.view]; [window makeKeyAndVisible]; return YES; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; } - (void)dealloc { [tabBarController release]; [window release]; [super dealloc]; } @end @implementation UITabBarController (TestRotation1AppDelegate) - (void)viewDidLoad { [super viewDidLoad]; // Add a third tab and push a view UIViewController *view1 = [[UIViewController alloc] init]; view1.title = @"Third"; UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:view1]; NSMutableArray *array = [[NSMutableArray alloc] init]; [array addObjectsFromArray:self.viewControllers]; [array addObject:nav]; self.viewControllers = array; // Push view2 inside the third tab UIViewController *view2 = [[UIViewController alloc] init]; [nav pushViewController:view2 animated:YES]; // Create a button to pop view2 UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; button.frame = CGRectMake(50, 50, 220, 38); [button setTitle:@"Pop this view" forState:UIControlStateNormal]; [button addTarget:self action:@selector(doAction) forControlEvents:UIControlEventTouchUpInside]; [view2.view addSubview:button]; } - (void) doAction { // ROTATION PROBLEM BEGINS HERE // Remove one line of code and the problem doesn't occur. [self.selectedViewController popViewControllerAnimated:YES]; self.selectedIndex = 0; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; } @end The interface auto rotates normally until you tap the button on tab #3. Your help will be geatly appreciated!

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• UINavigationController navigation stack problems in Landscape Mode

  - by David F

  I have a iPhone application that I am currently converting to a Universal Binary to work with the iPad. I have successfully implemented everything I need in terms of layout so that full landscape functionality is now supported in my app (previously I primarily used portrait mode to display content). But, I have one strange problem, and it ONLY occurs in landscape mode: when I push a view controller onto the stack, it takes two taps on the back button to return to the previous view controller!!! The first tap shows a blank view, but with the same name on the left-side back navigation button, the second tap takes the controller back to previous view like it should. I don't have an iPad to test, so I am relying on the simulator. The problem does not show up on the iPhone and doesn't show up if you rotate back to portrait mode. My app consists of a tabbarcontroller with navigation controllers loaded for its vc's: //application delegate - (void)applicationDidFinishLaunching:(UIApplication *)application //.... WebHelpViewController *vc8 = [[WebHelpViewController alloc] init]; UINavigationController *nv8 = [[UINavigationController alloc] initWithRootViewController:vc8]; [self.tabBarController setViewControllers:[NSArray arrayWithObjects:nv1,nv2,nv3,nv4,nv5,nv6,nv7,nv8,nil]]; To implement landscape capability, the UITabBarController is overridden to autorotate when required: //CustomTabBarController.m - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return [[(UINavigationController *)self.selectedViewController topViewController] shouldAutorotateToInterfaceOrientation:interfaceOrientation]; } ... works fine. I navigate into new views using this method SomeViewController *vc = [[SomeViewController alloc] init]; [self.navigationController pushViewController:vc animated:YES]; [vc release]; Has anyone encountered this problem, and do they know if it's only a simulation error?

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• Pop Over Control on iPad Problem !

  - by Momeks

  Hi , i try to load a view via UIPopover but my app crash after tap the popover button , i tried to solve it but i don't understand ! here is my code : - (IBAction)calendarPopUp:(id)sender { PopViewController *cal = [[PopViewController alloc]init]; //The compiler tells me the problem comes from this line : UIPopoverController *popOver = [[UIPopoverController alloc] initWithContentViewController:cal]; [popOver setDelegate:self]; [popOver presentPopoverFromRect:CGRectMake(113, 64, 226, 129) inView:self permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES]; [popOver setPopoverContentSize:CGSizeMake(226, 129)]; }

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• UITabBarController is possible to select the tab via code?

  - by ronny

  is it UITabBarController possible to select the tab in code?like UINavigationController we can use popViewController pop back to rootViewController instead of press the back button, so how can this implement in tabbarcontroller?

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• displaying keyboard raises memory... but it never comes down iPhone

  - by Joshep Freeman

  Hello again. I encountered a weird behavior in memory just by displaying the default keyboard. I've just created a project with an .xib file for testing purposes. This .xib file has an UITextField element in it and it's connected in the .h via: @property(nonatomic, retain) IBOutlet UITextField *sometext; The .m has no changes but: - (void)viewDidAppear:(BOOL)animated { [someText becomeFirstResponder]; } As you see it's very very simple. The problem is that once the keyboard is shown, the memory allocated for it NEVER goes down. I've tested this scenario in another project with the only difference of having two .xib files. Standar pushViewController and popViewController calls are made. Instruments show an increase of 600kb in memory allocations [which are a lot more in the actual iPhone device]. All in all, hehehe. My question is: How do I release the memory allocated for the keyboard?.

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