![I am creating a tab bar controller programmatically:
tabBarController = [[UITabBarController alloc] init];
FirstViewController* vc1 = [[FirstViewController alloc] init];
SecondViewController* vc2 = [[SecondViewController alloc] init];
vc1.title = #"Dallas";//[[NSUserDefaults standardUserDefaults] objectForKey:#"Citynamefrmhome"];
vc1.tabBarItem.image = [UIImage imageNamed:#"Dealss.png"];
vc2.title = #"My Vouchers";
vc2.tabBarItem.image = [UIImage imageNamed:#"nav_voucher_S.png"];
NSArray* controllers = [NSArray arrayWithObjects:vc1,vc2, nil];
tabBarController.viewControllers = controllers;
[self.view addSubview:tabBarController.view];
[vc1 release];
[vc2 release];
if I load it when the app starts, it looks great (look at figure 1):
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
autoMagically = [[AutoMagically alloc] initWithNibName:nil bundle:nil];
//self.window.rootViewController = self.dummyView;
[self.window addSubview:autoMagically.view];
[self.window makeKeyAndVisible];
return YES;
}
if I load it when a button is clicked, the way i wanna do it, it looks like figure 2. See how the titles arent showing and the buttons seem to be getting cutoff:
- (void)LoadView
{
AutoMagically *autoMagic = [[AutoMagically alloc]
initWithNibName:nil bundle:nil];
self.autoMagically = autoMagic;
[self.view insertSubview:autoMagic.view atIndex:0];
[autoMagic release];
}
Does anyone know why this is behaving like this?]1
You can call
[[[self.parentViewController.tabBarController.tabBar.items objectAtIndex:/*a number based on what tab it was ex: 2*/]setTitle:#"string"];
in your -viewDidLoad or -awakeFromNib methods. It might be better to use the latter instead of the former.
Related
When I add a view controller embedded by navigation controller, to a tab bar, its icon + title disappear briefly when coming back to the More tab.
However when the view controller is added as such, the icon+image are okay and don't disappear.
I've tried many things already, and am out of options. Any ideas?
Here's my AppDelegate code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.tabBarController = [[UITabBarController alloc] init];
// Must be placed here, just before tabs are added. Otherwise navigation bar
// will overlap with status bar.
[[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationSlide];
[self addViewControllersToTabBar];
self.window.rootViewController = self.tabBarController;
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
- (void)addViewControllersToTabBar
{
NSArray* tabBarClassNames =
#[
NSStringFromClass([FirstViewController class]),
NSStringFromClass([SecondViewController class]),
NSStringFromClass([FirstViewController class]),
NSStringFromClass([FirstViewController class]),
NSStringFromClass([FirstViewController class]),
NSStringFromClass([SecondViewController class]),
NSStringFromClass([FirstViewController class]),
];
NSMutableArray* viewControllers = [NSMutableArray array];
for (NSString* className in tabBarClassNames)
{
UIViewController* viewController = [[NSClassFromString(className) alloc] init];
UINavigationController* navigationController;
navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
[viewControllers addObject:navigationController];
}
[viewControllers addObject:[[FirstViewController alloc] init]]; // This one is fine.
self.tabBarController.viewControllers = viewControllers;
self.tabBarController.selectedViewController = viewControllers[2];
}
and the view controllers are literally nothing more than:
#implementation SecondViewController
- (instancetype)init
{
if (self = [super init])
{
self.title = #"second";
self.tabBarItem.image = [UIImage imageNamed:#"second.png"];
}
return self;
}
#end
Holy shit, spent so much time on this bug, but here's my workaround. Instead of:
navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
I created my own NavigationController as subclass of UINavigationController:
#implementation NavigationController
- (instancetype)initWithRootViewController:(UIViewController*)rootViewController
{
if (self = [super initWithRootViewController:rootViewController])
{
NSString* className = NSStringFromClass([rootViewController class]);
NSString* name = [className stringByReplacingOccurrencesOfString:#"ViewController" withString:#""];
self.tabBarItem.image = [UIImage imageNamed:[NSString stringWithFormat:#"%#Tab.png", name]];
}
return self;
}
#end
and then do:
navigationController = [[NavigationController alloc] initWithRootViewController:viewController];
Prerequisite is that tab images have the same base name as the view controller class name, which was already the case in my app.
I was setting self.tabBarItem.image inside the view controllers' init method, and this seems to cause the effect I was seeing. So in addition to using my own navigation controller, I also simply deleted setting the tabBarItem in each individual view controller.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
FirstViewController *fvc = [[FirstViewController alloc] init];
SecondtViewController *svc = [[FirstViewController alloc] init];
//Create UITabBarController
UITabBarController *theTabBarController = [[UITabBarController alloc] init];
NSArray *viewControllers = [NSSArry arrayWithObjects: fvc, svc, nil];
[theTabBarController setViewControllers:viewControllers];
// Create UINavigationController
UINavigationController *theNavigationController = [[UINavigationController
alloc]initWithRootViewController:theTabBarController];
[[self window] setRootViewController:theNavigationController];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
Then in the First View Controller i do a push to a second view
- (IBAction)Page2:(id)sender {
SBHomePageDetailViewController *detailPageViewController = [[SBHomePageDetailViewController alloc] init];
// Pushing to the stack
[[self navigationController] pushViewController:detailPageViewController animated:YES];
}
Now my UI shows the second view, however, the UITabBarController is missing. When i navigate back the tab bar view is back. How do I keep the tab bar controller visible in all ui screens?
Into AppDelegate.h file make property of theTabBarController:
#property (nonatomic, strong) UITabBarController *theTabBarController;
And here how I changed your didFinishLaunchingWithOptions method:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
FirstViewController *fvc = [[FirstViewController alloc] init];
SecondtViewController *svc = [[SecondtViewController alloc] init];
// Create UINavigationController
UINavigationController *theNavigationController = [[UINavigationController
alloc]initWithRootViewController:fvc];
//Create UITabBarController
self.theTabBarController = [[UITabBarController alloc] init];
NSArray *viewControllers = [NSArray arrayWithObjects: theNavigationController, svc, nil];
[self.theTabBarController setViewControllers:viewControllers];
[[self window] setRootViewController:theNavigationController];
[[self window] addSubview:self.theTabBarController.view];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
The problem in the code is that it tries to initialize a UITabBarController as the rootViewController of a UINavigationController in this line:
// Create UINavigationController
UINavigationController *theNavigationController = [[UINavigationController alloc]initWithRootViewController:theTabBarController];
From the docs:
rootViewController:
The view controller that resides at the bottom of the navigation stack. This object cannot be an instance of the UITabBarController class.
Try removing that line and, per #rmaddy's suggestion, put each View Controller in a Navigation Controller. Then set those Navigation Controllers as the Tab Bar Controller's VCs and set the App's RootViewController to the Tab Bar Controller:
FirstViewController *fvc = [[FirstViewController alloc] init];
SecondtViewController *svc = [[SecondtViewController alloc] init];
// Create the first UINavigationController
UINavigationController *firstNavigationController = [[UINavigationController
alloc]initWithRootViewController:fvc];
// Create the second UINavigationController
UINavigationController *secondNavigationController = [[UINavigationController
alloc]initWithRootViewController:svc];
//Create UITabBarController
theTabBarController = [[UITabBarController alloc] init];
NSArray *viewControllers = [NSArray arrayWithObjects: firstNavigationController, secondNavigationController, nil];
[theTabBarController setViewControllers:viewControllers];
[[self window] setRootViewController: theTabBarController];
Not sure how to title this question, but i'v got such a problem: Up until now i my app runs mainly in one navigationcontroller with table views. But now i'm trying to integrate dropdown settings menu, and can't get it properly done.
The way i'v done now and it works
The changeController is called from one button. ChangeController is in appdelegate.
- (void) ChangeController
{
self.window.backgroundColor = [UIColor blackColor];
DropDownExample *e = [[DropDownExample alloc] initWithStyle:UITableViewStyleGrouped];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:e];
[e release];
[self.window addSubview:self.navigationController.view];
self.window.backgroundColor = [UIColor blackColor];
[self.window makeKeyAndVisible];
}
But this approach has consequances - there is no transition if button is pressed, the settings menu appears instantly, you cannot go back via navigation bar above (nothing there).
So how to do this properly?? I'm new to ios, so just tell me the whole idea how to do this.
Didfinishlaunchingwithoptions method from appdelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease
];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
TableViewController *tableVC = [[TableViewController alloc] initWithNibName:#"TableView" bundle:nil andType:CONTROLLER_TYPE_FIRST];
UINavigationController *navC = [[UINavigationController alloc] initWithRootViewController:tableVC];
self.navigationController = navC;
[tableVC release];
[navC release];
self.window.rootViewController = _navigationController;
[self.window makeKeyAndVisible];
return YES;
}
Ok, here's the answer. Write the method changeController in the same class where the Button exists which calls changeController
In the method, write this.
- (void) ChangeController
{
DropDownExample *e = [[DropDownExample alloc] initWithStyle:UITableViewStyleGrouped];
[self.navigationController pushViewController:e animated:YES];
[e release];
}
What you want is to insert new UIViewController on the top of the present Stack. If you would be having a navigation Bar at the top by default then there would be a back Btn by default, which would pop up that controller.
The problem is pretty simple to understand with pictures.
I have a UINavigationController that allow the user to switch between to views.
The first view contains a search bar and a table view like so :
The second is a basic view where information about the cell are display
When I click on the search bar, the navigation controller gets hidden and the search bar is now at the top.
Now, if I click on a cell, it goes to the second views, but the navigation bar is first hidden like below :
And then, it automatically appears like that :
I have tried a couple of things like show the navigation bar before pushing the next view controller but it is quite ugly..
Does anyone know how to have the show the navigation bar directly on the second view (like in the contact application)?
[UPDATE] : Code
AppDelegate.m (I'm talking about navigationcontroller2)
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
FirstViewController *viewController1 = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil];
SecondViewController *viewController2 = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
viewController1.managedObjectContext = [self managedObjectContext];
viewController2.managedObjectContext = [self managedObjectContext];
viewController1.viewController2 = viewController2;
UINavigationController *navigationcontroller1 = [[UINavigationController alloc] initWithRootViewController:viewController1];
[navigationcontroller1.navigationBar setTintColor:[UIColor lightGrayColor]];
UINavigationController *navigationcontroller2 = [[UINavigationController alloc] initWithRootViewController:viewController2];
[navigationcontroller2.navigationBar setTintColor:[UIColor lightGrayColor]];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:navigationcontroller1, navigationcontroller2, nil];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
}
FirstView.m
- (void) searchBarTextDidBeginEditing:(UISearchBar *)theSearchBar {
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (!noResultsToDisplay) {
PinDetailsViewController *pinDetailsViewController = [[PinDetailsViewController alloc] initWithNibName:#"PinDetailsViewController" bundle:nil];
NSManagedObject *managedObject = [fetchedResultsController objectAtIndexPath:indexPath];
Pin *pin = (Pin *) managedObject;
[self.navigationItem setTitle:#"Pins"];
[self.navigationController pushViewController:pinDetailsViewController animated:YES];
[pinDetailsViewController updateWithPin:pin];
}
}
If you need anything else, just ask but I think it's all there.
Try to use this code in each viewcontroller.
- (void) viewWillAppear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:NO animated:animated];
}
- (void) viewWillDisappear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES animated:animated];
}
Before you push the new view controller, you should unhide the navigation bar:
[self.navigationController setNavigationBarHidden:NO animated:YES];
I had a similar problem with the position of my navbar. Mine was moving up behind the status bar, and I fixed the issue by manually setting the navbar frame:
-(void)adjustNavBarOrigin
{
CGRect r = self.navigationController.navigationBar.frame;
r.origin = CGPointMake(0, 20); // 20 is the height of the status bar
self.navigationController.navigationBar.frame = r;
}
I had to call this method in a number of places, including viewWillAppear: and didRotateFromInterfaceOrientation:, but it worked a treat :)
Hiding the UINavigationBar can disturb the properties sometimes. Try using the property alpha instead of hidden.
I am working on a small app, according to the requirement the app should have a tabBarItem with 3 items. For this I have programmatically created the tabBarController in the AppDelegate.m file and added the 3 different viewControllers, instantiated them and everything is working good. I see the tabBarItems and all views are working. In one of the views lets say in SecondViewController I show a popOverController where I used a UITableView and populate it with items. When I click one of the items it should show another view lets say sendFeedback. Until there everything is working fine, but as soon as this sendFeedback is presented as the modal view, it occupies the whole app i.e it hides the tabBarItem.
I present the important pieces of code here for review:
AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil];
viewController1.title = #"First";
UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
viewController2.title = #"Second";
UITableViewController *tableView3 = [[tableViewController alloc]initWithNibName:#"tableViewController" bundle:nil];
tableView3.title = #"Third";
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, tableView3 ,nil];
self.tabBarController.delegate = self;
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
[viewController1 release];
[viewController2 release];
[tableView3 release];
return YES;
}
In my popOverViewController.m file I am checking which row is selected in the table according to that I present the view
#pragma mark - TableView Delegate Methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
sendFeedback *sendEmailViewController = [[sendFeedback alloc]initWithNibName:#"sendFeedback" bundle:nil];
downLoad *downloadFilelViewController = [[downLoad alloc]initWithNibName:#"downLoad" bundle:nil];
if (indexPath.row == 0)
[self presentModalViewController:sendEmailViewController animated:YES];
else
[self presentModalViewController:downloadFilelViewController animated:YES];
}
Can anyone guide me how to overcome this with the multiple views. In case if anyone requires more information from my side I would be glad to provide.
NOTE: It is the same with the other view (downLoad) as well
EDIT: Here is how I am initializing my PopOverController in the AppDelegate.m file
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
if([viewController isKindOfClass:[SecondViewController class]]){
NSInteger index = [[self tabBarController] selectedIndex];
CGRect buttonFrame = [[[[[self tabBarController] tabBar] subviews] objectAtIndex:index+1] frame];
PopOverViewController *popoverView = [PopOverViewController new];
popoverView.contentSizeForViewInPopover = CGSizeMake(250, 85);
popover = [[UIPopoverController alloc]initWithContentViewController:popoverView];
NSLog(#"X:%f Y:%f",buttonFrame.origin.x,buttonFrame.origin.y);
[popover presentPopoverFromRect:buttonFrame inView:self.tabBarController.tabBar permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
}
Thanks
Modal view controllers are used to "block" your application and fulfill a task before you can proceed. So modal view controllers are not what you want to use.
Instead wrap your controllers which have to be shown in the popover in a navigation controller. In the tableView:didSelectRowAtIndexPath: method you can push the corresponding view controller to the navigation stack.
To slove your problem:
At the place where you create the popovercontroller initialize it with a new UINavigationController. And the navigation controller you have to initialize with a rootviewcontroller namely PopOverViewController.m.
PopOverController *popoverContentController = [[PopOverController alloc] init];
UINavigationController *navcon = [[UINavigationController alloc] initWithRootViewController:popoverContentController];
popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContentController];
And in PopOverController.m
if (indexPath.row == 0)
[self.navigationController pushViewController:sendEmailViewController animated:YES];
else
[self.navigationController pushViewController:downloadFilelViewController animated:YES];