viewwillappear

Situation I have a fairly simple app with 2 "layouts" using SharedPreferences. Main.xml Settings.xml Main has a textView that uses getString from SharedPreferences. Also a button to open Settings. Settings has a spinner and a button to save to SharedPreferences. The textView gets updated when the App loads as I am calling setText() inside onCreate(Bundle savedInstanceState) Problem When I open Settings and update the SharedPreferences, I use the Back button to get back to Main. Since I am calling setText() inside onCreate() the textView does not update again until I exit the app and open the

Sorry I'm pretty new to iOS dev. I have a UITableView setup from cells being pulled from a single XiB nib. I've created a on/off switch in the nib, and I am trying to save the state of the switch upon viewWillDisappear for the number of cells that I have. (6 cells to be exact). How can I loop through all the cells and save this information? I tried this in my UIViewController to get the info for one cell: - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear:animated]; UITableView *tv = (UITableView *)self.view; UITableViewCell *tvc = [tv cellForRowAtIndexPath:0]; } it gives me the

I'm adding a child view controller to a parent view controller, and everything works as expected, except that child view controller isn't having its usual callbacks triggered. eg, things like viewWillAppear(animated) is never called. I looked into it and thought it may be because I wasn't calling willMoveToParentViewController and didMoveToParentViewController on the child view controller before and after adding it to the parent, respectively. Unfortunately, fixing that has made no difference. Does anyone know how I can wire this up so that when I do addChildViewController and

Say I have UIViewController A and B. User navigates from A to B with a push segue. Than user presses back button and comes to A. Now viewWillAppear of A is called. Can I know in the code here that I came from back button ( navigationController popTo... ) and not by another way? And without writing special code in the B view controller. hm, maybe you can use self.isMovingToParentViewController in viewWillAppear , see docs , if it is NO then it means the current view controller is already on the navigation stack. I like to do the following in view controller A: - (void) viewWillAppear:(BOOL

viewWillAppear is called on UIViewController when a view is about to be shown on screen. Is it possible to get similar callback on UIView? How about the following from the UIView reference willMoveToSuperview:, didMoveToSuperview - Implement these methods as needed to track the movement of the current view in your view hierarchy. this will at least tell you when it is added to a view hierarchy but there is no guarantee that the view hierarchy is presented/viewable. No, but you can forward that notification to the desired view from your view controller. Note, I was originally going to post this

As an overview, I'm having issues with a UINavigationController inside of a UITabBarController calling viewWillAppear whenever a view is popped from the stack. From the delegate, a UITabBarController is made programmatically: // Create views for Tab Bar UINavigationController *view1 = [[UINavigationController alloc] initWithRootViewController:[[newsFeedNavigationController alloc] initWithStyle:UITableViewStylePlain]]; resizedTabBatItem *tabBarItem1 = [[resizedTabBatItem alloc] initWithTitle:nil image:[UIImage imageNamed:@"newspaper.png"] tag:0]; [view1 setTabBarItem:tabBarItem1]; [tabBarItem1

In iOS 4.x or lower, viewDidAppear and viewWillAppear, viewDidDisappear and viewWillDisappear, such ViewController's delegate methods are not getting called. The same methods work fine with the iOS 5.x. Why? Is it a bug in iOS 4.x or lower. Because in iOS 5.x all those methods gets called in proper manner and sequence. Thanks in advance, Mrunal For IOS4.x i use the UINavigationController delegate methods like this: -(void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated { if (SYSTEM_VERSION_LESS