I have two different scenarios that call the same uiviewcontroller,
scenario 1:
in the main uiviewcontroller clicking a button creates a dummy navigator and present it like this:
UINavigationController* dummyNavigation = [[UINavigationController alloc]init];
[dummyNavigation addChildViewController:bViewController];
[self presentViewController:dummyNavigation animated:NO completion:NULL];
scenario 2:
in the main uiviewcontroller clicking a button open a uitableviewcontroller in it every click on a row open bViewController like this:
[self.navigationController pushViewController:bViewController animated:NO];
I've set the navigation bar of bViewController to hidden
[self.navigationController setNavigationBarHidden:YES];
and created a button to replace the back button of the navigation with this code
[self dismissViewControllerAnimated:YES completion:NULL];
the problem: in both scenarios the back button code returns to the main uiviewcontroller but in scenario 2 its expected to return to the uitableviewcontroller
Check when dismissing, if it is in a navigation controller then pop otherwise dismiss.
if (self.navigationController) {
[self.navigationController popViewControllerAnimated:YES];
} else {
[self dismissViewControllerAnimated:YES completion:nil];
}
Related
I have a UINavigationController ans a chain of 3 simple controllers. Each one has a button. When press a button a next controller is Pushed. ViewController1 -> ViewController2 -> ViewController3. When I push a back button on the 3rd view i want to move to the first view. Using of backBarButtonItem is obligatory. Here is the code for second controller:
#import "ViewController2.h"
static BOOL isBackButtonPressed;
#implementation ViewController2
- (void)viewDidLoad {
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:#"back from 3" style:UIBarButtonItemStyleBordered target:nil action:nil];
[super viewDidLoad];
}
- (void)viewWillAppear:(BOOL)animated {
if (isBackButtonPressed) {
[self.navigationController popViewControllerAnimated:YES];
} else {
isBackButtonPressed = YES;
}
[super viewWillAppear:animated];
}
#end
But when I press back button on the third view I return to the second view instead of the first view. Could you help me to return to the first view pressing back button on the third view.
I tried suggestions from answers but they don't help.
Adding a selector to backBarButtonItem doesn't help because it is never called.
Adding a [self.navigationController popToRootViewControllerAnimated:YES] in viewWillDisappear methos also doesn't work. I don't know why. I think that the actual problem is how backBarButtonItem works.
Any other suggestions?
The behaviour I try to achieve exists in the calendar on iPhone. When you rotate iPhone to landscape you get to the weeek view. Then go to the event details, and rotate to the portrait. When you press back button you will get to a day view not to a week view, so a controller with weekview is skipped.
After countless number of tries my solution was simply not use backBarButtonItem! As whatever i do it always goes to previous viewController instead of calling its selector
Instead I use only leftBarButtonItem for navigation, as it guarantees calling my action.
Here an example
UIButton *backButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 27, 22)];
[backButton setImage:[UIImage imageNamed:#"backbutton"] forState:UIControlStateNormal];
[backButton addTarget:self action:#selector(backButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
This certainly calls backButtonPressed action.. This works both for IOS 6 and 7
No need to register a new selector for the back button, just do:
-(void)viewWillDisappear{
if ( [self.navigationController.viewControllers containsObject:self] )
//It means that the view controller was popped (back button pressed or whatever)
//so we'll just pop one more view controller
[self.navigationController popViewControllerAnimated:NO];
}
in your ViewController3 viewWillDisappear method
Try using this in your third view controller, this way you check if you have pressed the back button and directly pop to the root view controller which as you stated is your first view controller.
-(void) viewWillDisappear:(BOOL)animated {
if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) {
[self.navigationController popToRootViewControllerAnimated:YES];
}
[super viewWillDisappear:animated];
}
I had the same problem as you beofre and fixed it like this:
You can capture the back button on the ViewController3 and before poping the view, remove ViewController2 from the navigation stack like this:
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:#"back from 3" style:UIBarButtonItemStyleBordered target:self action:#selector(customBackPressed:)];
}
-(void)customBackPressed:(id)sender {
NSMutableArray *allViewControllers = [NSMutableArray arrayWithArray: navigationController.viewControllers];
for (UIViewController *vc in viewControllers)
{
// If vc is ViewController2 type, remove it
}
navigationController.viewControllers = allViewControllers;
[self.navigationController popViewControllerAnimated:YES];
}
Because ViewController2 is not in the stack anymore, it will jump to ViewController1.
Also, if ViewController1 is the root view controller, you can just do:
[self.navigationController popToRootViewControllerAnimated:YES];
I have a ConnectionViewController and when i click on the Test button, i would like to switch for a tabViewController.
In my ConnectionViewController :
- (IBAction)testButton:(id)sender {
TabBarViewController *tabBarViewController = [[TabBarViewController alloc] init];
[self presentViewController:tabBarViewController animated:YES completion:nil];
}
but when i click on my test button, the TabBarView is black, without anything.
What could i do to fix that ? I would like a modal segue, not a push.
Thx a lot
[EDIT] : The solution is to create a custom segue with a class like CustomSegue.m with this method :
-(void) perform {
ConnectionViewController *src = (ConnectionViewController*) self.sourceViewController;
TabBarViewController *dest = (TabBarViewController*) self.destinationViewController;
[UIView transitionWithView:src.navigationController.view duration:0.2 options:UIViewAnimationOptionTransitionFlipFromLeft animations:^{
[src presentViewController:dest animated:YES completion:NULL];
}
completion:NULL];
}
The reason why the tab bar controller is black is that it does not have any viewControllers to present. You need to set tabBarController.viewControllers property before you present it. Lets say you want to present a tabBarViewController with viewController1 on the first tab and viewController2 on the second tab.
tabBarViewController.viewControllers = #[viewController1, viewController2];
My main menu (a ViewController) is embedded in a NavigationController that I added in the storyboard in Xcode4.
I have a button in my menu, displaying a new view. To display it I use :
- (IBAction) display : (id) sender
{
if(!anotherView) anotherView = [[AnotherView alloc] initWithNibName:#"AnotherView" bundle:nil];
[self presentModalViewController:anotherView animated:NO];
}
My other view is correctly displayed with all its objects and elements. Excluding my NavigationController's bar, that doesn't appear. Why ?
Thanks for your advices
You are presenting the view modally what you probably meant was
[self.navigationController pushViewController:anotherView animated:YES]
of course what you really want to do is not mix and match storyboard and non storyboard flows unnecessarily like this and have the storyboard do this for you
you are presenting your viewController modally. If you want to use the navigation controller you have to push your view onto the navigation stack.
replace
[self presentModalViewController:anotherView animated:NO];
with
[self.navigationController pushViewController:anotherViewController animated:YES];
You can still present your view modally without losing the navigation bar. Try this code:
AnotherView *tempAnotherView = [[AnotherView alloc] initWithNibName:#"AnotherView" bundle:nil];
[self setAnotherView:tempAnotherView];
[tempAnotherView release];
UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:self.anotherView] autorelease];
[self.navigationController presentModalViewController:navController animated:YES];
Hope it helps! :)
This is probably going to be very obvious, but here goes. I have two ViewControllers, one that shows the details of a person with a [+] button that opens up another ViewController that manages the edits of the Person. When the person about to be deleted, an alert is presented and if OK is selected, the edit view should disappear and the DetailView should also disappear/transition back to the PersonsListView (not shown in code below).
I can get the EditView to dismiss, but I can't get the DetailView to dismiss as well.
Any help is appreciated.
The two ViewControllers:
#implementation PersonDetailViewController
...
- (void)editPerson
{
PersonDetailEditViewController *editView = [[PersonDetailEditViewController alloc] initWithTenant:self.person];
[editView setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:editView];
[self presentModalViewController:navController animated:YES];
}
...
#end
and
#implementation PersonDetailEditViewController
...
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1) {
[Person deletePerson:self.person];
NSError *error;
[self.person.managedObjectContext save:&error];
[[self navigationController] dismissModalViewControllerAnimated:YES];
// *** HERE I ALSO WANT TO DISMISS THE DETAILVIEW ***
}
}
...
#end
Assuming that PersonDetailViewController is presented in a navigation controller you should be able to do what you want by adding the following line:
[self.navigationController popViewControllerAnimated:YES];
I have the following in the mainwindow.xib
Navigation Controller
List item
Tab bar controller
tabbar
firstViewController
SecondViewController
The entrypoint
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
navController.viewControllers = [NSArray arrayWithObject:tabBarController];
[window addSubview:navController.view];
[window makeKeyAndVisible];
return YES;
}
and now in the first viewcontroller i'm writing
-(void)loadView
{
if(rootAppDelegate==nil)
rootAppDelegate=(tabbarAppDelegate *) [[UIApplication sharedApplication]delegate];
listEmergencyItems= rootAppDelegate.listOfEmergencySectionItems;
self.rootAppDelegate.navController.navigationBarHidden = NO;
[super loadView];
}
and in the second viewcontroller i'm writing
- (void)loadView
{
if(rootAppDelegate==nil){
rootAppDelegate=(tabbarAppDelegate *) [[UIApplication sharedApplication]delegate];
}
listHospitalsItems= self.rootAppDelegate.listOfHospitalsItems;
self.rootAppDelegate.navController.navigationBarHidden = YES;
[super loadView];
}
And on the runtime, when it first loads the first view, i see the navigationbar where i need to navigate into a detail view.
And when i press the second tab bar item, i go to the second view, and the navigation bar gets hidden.
But when i press back on the first tabbar item, i.e. returning to the first viewcontroller. the navigation bar remains hidden.
Any idea?
The navigation bar won't show in the second view because neither view was placed on the navigationcontroller's stack. you want to use something like this in the parent to present a child view instead of overriding loadView
ViewToPresentViewController *myVController = [[ViewToPresentViewController alloc] initWithNibName:#"ViewToPresentViewController"
bundle:nil];
myVController.property = someValue;
[self.navigationController pushViewController:myVController
animated:YES];
[myVController release];
then, as i said previously, you can just use [self.navigationController setNavigationBarHidden:animated:]