I have an iPhone app based around a UINavigationController with a UIToolbar at the bottom with various buttons in it that I created through the Interface Builder. When I use [navigationController pushViewController:animated:] my new view slides into place as expected but then all of the buttons are disappearing from the toolbar - the toolbar itself stays visible, it's just completely empty.
How do I get the buttons to stay put?
Here's the bit where I respond to the user pressing one of the toolbar buttons that then shows the new view:
- (IBAction)clickSettings:(id)sender {
NSLog(#"Clicked on 'Settings' button");
SettingsViewController *settingsViewController = [[SettingsViewController alloc] initWithNibName:#"Settings" bundle:nil];
[navigationController pushViewController:settingsViewController animated:YES];
}
The tool bar buttons are the property of a given view; when you push a new view on to the navigation stack, the tool bar buttons of the new view will slide in to place.
The tool bar itself seems to "belong" to the navigation controller; visibility of the toolbar is controlled by the UINavigationController toolbarHidden property, i.e.,
self.navigationController.toolbarHidden = YES;
To actually keep the toolbar from one view to the next, you can copy the toolbarItems property from one UIView to the next.
Related
My app works with tabbarcontroller as root view of the window, where on clicking each tab item loads splitviewcontroller with required views for it. The left and right panes of split views are navigation controllers. Now on any button action or didselectrow in tableview corresponding views are to be loaded in right pane. I succeeded loading views in right pane , but not able to display barbuttonitem when new view controller loaded in right pane of split view.
tabbarcontroller
-->splitviewcontroller
----->Leftpane:navigation controller
--------------->view controllers
----->Rightpane:navigation controller
--------------->view controller
Each Splitview of tab bar wil act like 'iPad Mail app' .
To make the app gernalised, I taken class RootiPadViewController which has the delegate of uisplitviewcontroller and uipopovercontroller which loads alls views in slpitview.
Loaded viewcontroller in right pane of split view as below.
UISplitViewController *splitViewController = (UISplitViewController*)[appDelegate.tabBarController.viewControllers objectAtIndex:tabIndex];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewController];
//[navController pushViewController:viewController animated:YES];
NSMutableArray *array = [[NSMutableArray alloc] init];
[array addObject:[splitViewController.viewControllers objectAtIndex:0]];
[array addObject:navController];
splitViewController.viewControllers = array;
[array release];
Please suggest me why bar button item not displayed when views changed in splitviewcontroller.
App looks as below
I may be wrong but from my knowledge, the bar button item should appear only when you are in portrait mode, because:
a split view controller has two controllers (master and detail view controller)
both view controllers are shown on the screen when you are in landscape mode
when you are in portrait mode, only the detail view controller is shown, thus the bar button item appears
the bar button item goal is to let you open the master view controller in portrait mode
Please let me know if that helps you.
For Navigation Controller each view should define their left and right bar buttom items, if nothing defined then the tabbar will be empty . The only barbutton Item you will get free is the back barbutton item which appeared when you push a new View Controller above the rootViewController of the navigationController
You have to to allocate them in your ViewDidLoad method of each viewController in the NavigationControoler and set them as right and left barbutton item of your parentViewController(ie navigationController)
Please check this sample project https://github.com/alexth/TBSV
It's about how to use UISplitViewController inside UITabBar.
All logic is in Appdelegate's -loadSplitToTab Just total inheriting of all controllers, in every other cases UISplitViewController needs to be a root (as described in Apple documents) and you will not be able to use UISplitViewController inside UITabBar.
How do I navigate back to the previous page with a UITableViewController. I tried to show a navigation bar with navigation button at the top of the screen, but the navigation bar will not show. I know that you have to give the previous view a title but when I go to do that it does not show anything. Also, since it is a UITableViewController I am not able to drop a navigation bar and add a button to the main view. All I would like to do is display my lists and have the option to navigate back to the previous list with a single button in the upper left corner.
The problem you having with the NavigationController is that your tableViewController is not in the NavigationController hierarchy. Want you want to do this when adding the tableViewController:
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:yourTableViewController];
Then you can do this to add yourTableViewController:
[self.view addSubview:navigationController.view];
If you don't want the navigationBar to appear on the tableViewController just use:
self.navigationController.navigationBarHidden = YES;
in yourTableViewController viewWillAppear method.
When your going to add the view after the tableView you just use:
[self.navigationController pushViewController:someViewController animated:YES];
It's not enough to give the child view a title. You need to give the child view's navigation item a title before you present it. For example, in the parent view, before you push the the view to the navigation stack, do something like this...
[MyChildView.MyNavigationItem setTitle:#"A cool Title"];
For the navigation you are trying to achieve you should be using a UINavigationController. It already has the functionality you describe with the navigation bar and back button built into it.
To move to the next screen (which can be a UITableViewController) you use pushViewController:animated: and to move to the previous screen you use popViewControllerAnimated: (although the built in back button will do this for you).
I suggest reading the UINavigationController class documentation if you are not already familiar with it.
I am new to iPhone development.
my application is based on UInavigationBar .
I want to add a navigation bar item in one of my xib, but in the .xib i just simulate the navigation bar so i can't drag and drop the item. thank you
You'll want to add the nav bar buttons programmatically. You see, your xib has a view that is shown within the content view of the UINavigationController. It is the UINavigationBar to which your app has access and which controls the nav bar items. As you point out, your xib has just a placeholder for the nav bar, which is really a convenience for you so your view is sized correctly as you lay it out.
In your UIViewController for the xib, you an add view-appropriate nav bar items with code something like
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc]
initWithTitle:#"View" style:UIBarButtonItemStylePlain
target:self
action:#selector(viewControls:)] autorelease];
Does that make sense?
In order to be able to add items into a UINavigationBar, you need to first add a UINavigationBar to your view and then add items to it.
You cannot drag and drop items on a simulated navigation bar. A simulated Navigation Bar is just there to make sure you have a correct estimate of the view size available to you if you are adding a Navigation Bar by some other means or from code.
You should be using a UINavigationController for a navigation based hierarchy. That will take care of a lot of the lower details of how to make navigation work as you would like it to. I would also recommend setting that all up programmatically. Here is how you would do that.
// Initial setup of navigation
YourViewController *yvc = [[YourViewController alloc] init];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:yvc];
[[self view] addSubview:[nav view]];
Then when you want to go to a new view controller (the animated sliding that you normally see), you do this
// From inside 'YourViewController',
// this is normally when the user touches a table view cell
NewViewController *nvc = [[NewViewController alloc] init];
[self.navigationController pushViewController:nvc];
If you want to change the title or the buttons, you do this
// This is normally in viewDidLoad or something similar
[self.navigationItem setTitle:#"Hello World!"];
[self.navigationItem.rightBarButtonItem:/* A UIBarButtonItem */];
I have a simple tabBarController application where the user can navigate around 3 views.
In one of the views I have a UIButton that when touched moves the user to a fourth view. the problem is that the new view doesn't have the tab bar navigation visible.
what do I need to do to the fourth view to have it also use the tabBarController feature set.
thanks for any help
here's the code that transitions to the fourth view when a UIButton is touched:
-(IBAction) nextQuestion {
Question2 *q2 = [[Question2 alloc] initWithNibName:#"Question2" bundle:nil];
q2.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:q2 animated:YES];
[q2 release];
}
A modal view controller always takes up the entire screen. Its purpose is to provide a modal interface that does not let the user interact with other parts of the UI until they dismiss the modal view.
To display another view inside a tab, you could make the root controller of that tab a navigation controller. A button tap would then push the Question 2 controller on the nav controller's stack.
My i have to develop simple window based iphone application.
In my first screen I design the UITabBarController with four TabBarButton.On first Tab screen contains three buttons.
When i click on of the button, the screen should navigate on simple tableView screen.But tableView screen the TabBarController should have be visible. Means simply first replacing with table view and move back to again previous one(The UITabBarController should be visible on all srceen).
Wrap your root view controllers in UINavigationControllers. Then, add the UINavigationControllers to the UITabBarController (so there should be 4 UINavigationControllers, one for each tab). When the button is clicked in the original view controller, do something like:
-(void) buttonClicked {
SimpleTableViewController *tvc = //etc
[self.navigationController pushViewController:tvc animated:YES];
[tvc release];
}