I have a back button on my answer view controller (a view controller that displays answers) if the user hits the back button I created it switches to a view that has the title of "Back" and just an empty tableview, before switching back to my main view of where all the questions to be answered are displayed. Why is this happening? Its a very brief thing, but definitely noticeable!
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 48)];
navBar.delegate = self;
UINavigationItem *backItem = [[UINavigationItem alloc] initWithTitle:#"Back"];
[navBar pushNavigationItem:backItem animated:NO];
UINavigationItem *topItem = [[UINavigationItem alloc] initWithTitle:#"Question"];
[navBar pushNavigationItem:topItem animated:NO];
topItem.leftBarButtonItem = nil;
[self.view addSubview:navBar];
- (BOOL)navigationBar:(UINavigationBar *)navigationBar shouldPopItem:(UINavigationItem *)item
{
ViewController *controller = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController:controller animated:YES completion:nil];
return true;
}
- (void)navigationBar:(UINavigationBar *)navigationBar didPopItem:(UINavigationItem *)item
{
ViewController *controller = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController:controller animated:YES completion:nil];
}
You're creating your own UINavigationBar and UINavigationItem instances and you probably shouldn't be. The situation you describe is exactly what a UINavigationController is for. When using a UINavigationController it creates the UINavigationBar and each UIViewController that you show on screen (push into the navigation controller) has its own UINavigationItem (with the title taken from the title of the view controller).
The reason you get an empty 'view' titled "Back" is that you're creating it:
UINavigationItem *backItem = [[UINavigationItem alloc] initWithTitle:#"Back"];
[navBar pushNavigationItem:backItem animated:NO];
Dispense with all of this, create a UINavigationController and make your question view controller it's root view controller, then add the navigation controller to the screen. Then when a question is answered, push the answer view controller:
[self.navigationController pushViewController:answerViewController animated:YES];
Related
in my app from a login screen i am navigating to a class say classA , like this
classA *objUserHome = [[classA alloc]init];
[self presentModalViewController:objUserHome animated:YES];
[objUserHome release];
and ClassA is having a navigating bar and a tabbar(5 tabs in it), i have created my tab bar programmatically like this
- (void)viewDidLoad
{
[super viewDidLoad];
//Create tab bar controller and navigation bar controller
tabBarController = [[UITabBarController alloc] init];
NSMutableArray *arrControllers = [[NSMutableArray alloc] initWithCapacity:5];
//Add PunchClock to tab View Controller
PunchClock* objPunchClock = [[PunchClock alloc] initWithTabBar];
NavigationController = [[UINavigationController alloc] initWithRootViewController:objPunchClock];
NavigationController.navigationBar.tintColor = [UIColor brownColor];
[arrControllers addObject:NavigationController];
[NavigationController release];
[objPunchClock release];
//Add Time_Sheet to tab View Controller
Time_Sheet* objTime_Sheet = [[Time_Sheet alloc] initWithTabBar];
NavigationController = [[UINavigationController alloc] initWithRootViewController:objTime_Sheet];
NavigationController.navigationBar.tintColor = [UIColor brownColor];
[arrControllers addObject:NavigationController];
[NavigationController release];
[objTime_Sheet release];
//Add PTO to tab View Controller
PTO* objPTO = [[PTO alloc] initWithTabBar];
NavigationController = [[UINavigationController alloc] initWithRootViewController:objPTO];
NavigationController.navigationBar.tintColor = [UIColor brownColor];
[arrControllers addObject:NavigationController];
[NavigationController release];
[objPTO release];
//Add PunchClock to tab View Controller
CrewPunch* objCrewPunch = [[CrewPunch alloc] initWithTabBar];
NavigationController = [[UINavigationController alloc] initWithRootViewController:objCrewPunch];
NavigationController.navigationBar.tintColor = [UIColor brownColor];
[arrControllers addObject:NavigationController];
[NavigationController release];
[objCrewPunch release];
//Add PunchClock to tab View Controller
Reports* objReports = [[Reports alloc] initWithTabBar];
NavigationController = [[UINavigationController alloc] initWithRootViewController:objReports];
NavigationController.navigationBar.tintColor = [UIColor brownColor];
[arrControllers addObject:NavigationController];
[NavigationController release];
[objReports release];
// Add this view controller array into the tab bar
//self .viewControllers = arrControllers;
tabBarController .viewControllers = arrControllers;
[arrControllers release];
[self.view addSubview:[tabBarController view]];
}
And ClassA is inherited from UIViewController
now the problem is, after navigating to classA , view of classA is shifted some 4mm downwards why its so?? how can i fix this,,pls help me out ,, thanx in advance
When using storyboards and Modal Transition between 2 or more views you can encounter an error similar to the above.
If you use Modal Transition from ViewControllerA to ViewControllerZ and then attempt to Modal Transition from ViewControllerZ back to ViewControllerA sometimes the view of ViewControllerA gets pushed down the Window slightly.
This can be prevented using:
[self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
On ViewControllerZ to go back to ViewControllerA from an event on ViewControllerZ
You might have chosen some top bar in your Interface Builder or XIB file and additionally set the navigation bar. Dont choose any top bar in the XIB file.
Try as below
[self.navigationController.view addSubview:[tabBarController view]];
After a long research i finally fixed this issue just by inheriting the class from UINavigationController instead of UIViewControler
I have a tab bar application.
Here's launching code
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
[self.window makeKeyAndVisible];
self.tabBarController=[[UITabBarController alloc] init];
StartViewController *startViewController=[[StartViewController alloc] initWithNibName:#"StartViewController" bundle:nil];
NavRootViewController *navRootViewController=[[NavRootViewController alloc] initWithNavControllerWithSubViewController:startViewController];
HelpViewController *helpViewController=[[HelpViewController alloc] initWithNibName:#"HelpViewController" bundle:nil];
SettingsViewController *settingsViewController=[[SettingsViewController alloc] initWithNibName:#"SettingsViewController" bundle:nil];
AboutUsViewController *aboutUsViewController=[[AboutUsViewController alloc] initWithNibName:#"AboutUsViewController" bundle:nil];
[self.tabBarController setViewControllers:[NSArray arrayWithObjects: navRootViewController, helpViewController, settingsViewController, aboutUsViewController, nil]];
[[UIApplication sharedApplication] setStatusBarHidden:YES];
self.window.backgroundColor = [UIColor whiteColor];
self.window.rootViewController=self.tabBarController;
Application launched with 4 tab bar tabs.
This action is called after user presses start button in the first tab's navigation controller's root view controller
-(IBAction)startPressed:(id)sender
{
NSLog(#"startPressed: called");
RootViewController *vController=[[RootViewController alloc] initWithNibName:#"RootViewController" bundle:nil];
[self.navigationController pushViewController:vController animated:YES];
}
This works fine but I need to hide tab bar for my RootViewController
property hidesBottomBarWhenPushed does not work.
Help me please, how can it be done?
I hope this helps you:
- (void)viewWillAppear: (BOOL)animated
{
self.hidesBottomBarWhenPushed = YES;
}
Yea you have to add the modalview on window not on the viewcontroller of tabBar.
Try something like.. make an object of AppDelegate like:
AppDelegate *appDelegate=[[UIApplication sharedApplication]delegate];
then in next line add
[appDelegate.window.rootviewcontroller.view presentModalViewController:vController animated:YES];
or add your code [self presentModalViewController:vController animated:YES] in the viewDidAppear of the firstviewcontroller of tabBar.
What did you do to solve the problem??I would like to know that also.
If you don't want the main view to show the tab bar, you shouldn't be pushing it onto the navigation controller. Doing this causes the application to assume that this new controller is part of the navigation hierarchy. What is probably the best solution is to start your application on the RootViewController, and then present the navigation controller modally. When you're done with the navigation controller, have it call dismissModalViewController on itself.
Solved using this code:
-(IBAction)startPressed:(id)sender
{
NSLog(#"startPressed: called");
RootViewController *vController=[[RootViewController alloc] initWithNibName:#"RootViewController" bundle:nil];
UINavigationController *navController=[[UINavigationController alloc] initWithRootViewController:vController];
[vController setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];
[((AppDelegate *)[UIApplication sharedApplication].delegate).tabBarController presentModalViewController:navController animated:YES];
}
Thanks to #iPhone Developer
UIViewController *nextViewController = [[UIViewController alloc] initWithNibName:#"NextViewController" bundle:[NSBundle mainBundle]];
// hide UITabbarController
nextViewController.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:nextViewController animated:YES];
[nextViewController release];
Is it possible to push a new viewController into an existing view within another view controller?
Here is my setup to begin with:
You can see that I have a UITableView. When a cell is tapped, a new view controller is pushed using this code;
DetailTableViewController *viewcontroller = [[DetailTableViewController alloc] initWithStyle:UITableViewStyleGrouped];
viewcontroller.item = (MWFeedItem *)[itemsToDisplay objectAtIndex:indexPath.row];
[self presentViewController:viewcontroller animated:YES completion:nil];
[viewcontroller release];
Unfortunately this looks like this though and sits on top of the bar at the top saying "Will Roberts"
Why is this happening as it's clearly outside of the view I set it to be pushed from...
Instead of "presentViewController", use
DetailTableViewController *viewcontroller = [[DetailTableViewController alloc] initWithStyle:UITableViewStyleGrouped];
viewcontroller.item = (MWFeedItem *)[itemsToDisplay objectAtIndex:indexPath.row];
[self.navigationController pushViewController:viewcontroller animated:YES];
[viewcontroller release];
or use modal view controller
[self presentModalViewController:viewcontroller animated:YES]
//Presenting new view controller with navigation controller will help you.
DetailTableViewController *viewcontroller = [[DetailTableViewController alloc] initWithStyle:UITableViewStyleGrouped];
viewcontroller.item = (MWFeedItem *)[itemsToDisplay objectAtIndex:indexPath.row];
[self.navigationController presentViewController:viewcontroller animated:YES completion:nil];
[viewcontroller release];
//Edited
DetailTableViewController *viewcontroller = [[DetailTableViewController alloc] initWithStyle:UITableViewStyleGrouped];
UINavigationController *nav1=[[UINavigationController alloc]initWithRootViewController:viewController1];
[self presentModalViewController:nav1 animated:YES];
I'd like to add a UINavigationController to my app info view (NOT to my main view). I've watched/read a number of tutorials showing how to add it to the main window through the AppDelegate using IB. In my case, I only want it to appear when a user presses the info button and is brought to the infoView. Here is how I switch to the infoView within my MainViewController:
- (IBAction)infoButtonPress:(id)sender
{
// Create pointer to instance of InfoViewController
InfoViewController *infoView = [[InfoViewController alloc] initWithNibName:#"InfoViewController" bundle:nil];
// Add view switching animation
infoView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
// Change view using animation
[self presentModalViewController:infoView animated:YES];
}
At this point the infoView is displayed and I would like THIS to be the RootView of the UINavigationController. I have tried adding the line:
UINavigationController *infoNavController = [[UINavigationController alloc]
initWithRootViewController:infoView];
after creating an instance of InfoViewController, but the app crashes. Is it possible to add UINavigationController to views other than the main view?
Thanks.
You are very close with your implementation. Try it in this order.
InfoViewController *infoView = [[InfoViewController alloc] initWithNibName:#"InfoViewController" bundle:nil];
UINavigationController *infoNavController = [[UINavigationController alloc]
initWithRootViewController:infoView];
[infoView release]; // skip this if using ARC
infoView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:infoNavController animated:YES];
UPDATE
To kill this modal, you will have to add your buttons to the main modal view.
InfoViewController.m
-(void)cancel:(id)sender {
[self dismissModalViewControllerAnimated:YES];
}
-(void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *cancelButton =
[[UIBarButtonItem alloc] initWithTitle: #"Cancel"
style: UIBarButtonItemStylePlain
target: self
action: #selector(cancel:)];
self.navigationItem.leftBarButtonItem = cancelButton;
[cancelButton release];
}
I am facing an issues with navigating between the views, Basically I have 3 views:
RootView
view1
View2
What I want to do is when I click on back button of View2 I want RootView to be loaded instead of loading view1 (which is default).
.. I have written the below code in My view1.m before pushing the view2ViewController, code:
UIBarButtonItem *back = [[UIBarButtonItem alloc] initWithTitle:#"Back" target:self action:#selector(someMethod:)];
self.navigationItem.backBarButtonItem = back;
-(void)someMethod:(id)sender{ [self.navigationViewCOntroller popToRootViewControllerAnimated:YES] }
The above code is not working
Try this:
To go to a View:
Aview *aview =[[Aview alloc] initWithNibName:nil bundle:nil];
settings.modalPresentationStyle = UIModalPresentationFullScreen;
[self presentModalViewController:settings animated:YES];
To go back:
[self dismissModalViewControllerAnimated:YES];
So in ur case its:
-(void)someMethod:(id)sender{
Rootview *rootview =[[Rootview alloc] initWithNibName:nil bundle:nil];
settings.modalPresentationStyle = UIModalPresentationFullScreen;
[self presentModalViewController:settings animated:YES];
}
The second half of your question is not clear.
Try this
[self.navigationController popToRootViewControllerAnimated:YES];
Hope this will work for you. By this you can navigate from View2 to your root view.