I have an UITabBarController added programmatically one ViewController as ModalViewController.
It acts perfectly normal, when touching/switchen between the tabs.
But when touching the selected tab again, the delegate didselectviewcontroller did not get called.
Strange behaviour, if I setup a new project with TabBarController template, this is acting normal and everytime I touch a tab its delegate is being called.
What I noticed, if I touch 2-5px above the tabbar, the tab is being touched and the delegate is being called.
There is no view above the tabbar, I checked this 100 times.
if I touch in the lightgray area, the touch on the tab is being fired.. thats a miracle to me, anybody any idea?
Code:
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.tabBarController = [[UITabBarController alloc] init];
_splashScreen = [[SplashScreenController alloc] initWithNibName:#"SplashScreenView" bundle:nil];
self.window.rootViewController = _splashScreen;
[self.window makeKeyAndVisible];
if finished loading data in background,
//getting UIViewControllers from Config and adding to NSMutableArray *tbcArr;
[self.tabBarController setViewControllers:tbcArr];
self.tabBarController.customizableViewControllers = nil;
self.tabBarController.delegate = self;
[self.splashScreen presentModalViewController:self.tabBarController animated:YES];
Related
I'm creating a tabbed iPhone application. When the application launches, if the user is not logged in, a modal view is supposed to be presented over the top of the tab bar controller (so it looks like this is the first screen). Upon login the modal view slides away to reveal the tab bar controller behind it.
Unfortunately when I call [self.tabBarController presentViewController:self.loginViewController animated:NO completion:NULL] from inside my application delegate I can still see the tabs along the bottom of the screen. I need them covered.
Ironically when searching for a solution, I find most people are having the inverse problem.
I have noticed that if I don't set my window's rootViewController to the UITabBarController, only inserting its view as a subview of the window, then it works as expected, but Xcode complains about the lack of rootViewController. What's going on here?
My application delegate's -application:didFinishLaunchingWithOptions: method looks like this.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self registerDefaults];
self.tabBarController = [[[UITabBarController alloc] init] autorelease];
self.tabBarController.viewControllers = #[
[self makeSellingListingsController],
[[[UIViewController alloc] init] autorelease], // stub
[[[UIViewController alloc] init] autorelease], // stub
[[[UIViewController alloc] init] autorelease] // stub
];
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
self.window.rootViewController = self.tabBarController;
[self.window addSubview:self.tabBarController.view];
[self presentLogin]; // this doesn't cover the tabs, but it should
[self.window makeKeyAndVisible];
return YES;
}
- (void)presentLogin
{
[self.tabBarController presentViewController:[[[FLLoginViewController alloc]
initWithNibName:#"FLLoginViewController"
bundle:[NSBundle mainBundle]] autorelease]
animated:NO
completion:NULL];
}
Don't present it from the tab bar controller, but from the root controller in the first tab, in its viewDidAppear method. If you pass NO to the animation parameter, the modal screen will be the first thing you see when you start the app.
I have the following structure on my iPhone app
AppDelegate / UITabBarController / 5 UINavigationControllers(My tabs) / UIViewController(like rootViewController for each UINavigationController)
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
HomeViewController *homeViewController = [[HomeViewController alloc] init];
GoalsTableViewController *goalsTableViewController = [[GoalsTableViewController alloc] init];
HistoryViewController *historyViewController = [[HistoryViewController alloc] init];
SettingsViewController *settingsViewController = [[SettingsViewController alloc] init];
InfoViewController *infoViewController = [[InfoViewController alloc] init];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.delegate = self;
self.navBarActivity = [[UINavigationController alloc] initWithRootViewController:homeViewController];
self.navBarSettings = [[UINavigationController alloc] initWithRootViewController:settingsViewController];
self.navBarHistory = [[UINavigationController alloc] initWithRootViewController:historyViewController];
self.navBarGoals = [[UINavigationController alloc] initWithRootViewController:goalsTableViewController];
self.navBarAbout = [[UINavigationController alloc] initWithRootViewController:infoViewController];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:self.navBarActivity, self.navBarGoals, self.navBarHistory,self.navBarSettings, self.navBarAbout, nil];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
}
In some UIViewControllers I implemented a MFMailComposeViewController in order to send emails.
I experimented a weird issue (reproduced on simulator and real devices iOS 5.0 and 5.1)...
Using an iPhone Simulator (only iOS 5.0 or 5.1), if I simulate a low memory warning while a MFMailComposerViewController modal is open on the screen and then tap on Cancel and then tap on Delete|Save draft, when the modal is dismissed the parent view seems not visible (blanked view).
The life cycle seems work fine due, if I follow the same steps but after simulate a low memory warning I send the email from MFMailComposeViewController modal, when modal is dismissed, my parent view looks fine.
Any suggestions how to prevent my parent view from being unloaded on memory warning?
Edit1
I figured out what is happening, after unloading and comeback to the view and entering the last view within viewdidload(life cycle), the tabBar is not inserting navigation view. I check the subviews of tabBar:
UITransitionView
==><UIViewControllerWrapperView>
==> empty
<UITabBar>
I reintegrated the view of navigationBar by adding as subview in viewdidload:
UIView *tabBarControllerWrapperView = [[[self.tabBarController.view.subviews objectAtIndex:0] subviews] objectAtIndex:0];
// tabBar UIViewControllerWrapperView has not views
if([tabBarControllerWrapperView.subviews count] == 0)
{
// add navigationbar view
[tabBarControllerWrapperView addSubview:self.navigationController.view];
}
There is no better way to fix it, any thoughts?
After a memory warning is possible that on the non visible controllers is called viewDidUnload (iOS <= 5 ).In your case the view of the controller that presented the modal mailcomposer was probably unloaded.
The idea behind viewDidUnload is that you save the data you need to restore the view once viewDidLoad is called again. What you have to keep in mind is that your viewDidLoad can be called multiple times.
On iOS6 viewDidUnload is not called anymore, so this logic must be moved to didReceiveMemoryWarning
i have a tabBarController application and using .xib files for the interface not the storyboard
i have this code by default in the appdelegate
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
UIViewController *viewController1 = [[PopAdsFirstViewController alloc] initWithNibName:#"PopAdsFirstViewController" bundle:nil];
UIViewController *viewController2 = [[PopAdsSecondViewController alloc] initWithNibName:#"PopAdsSecondViewController" bundle:nil];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, nil];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
i have created a Login View and don't know how to show it before the tabBarView and hide t after a successful login.
One way would be to show it as a modalView on launch. Dismissing upon successfull login?
eg:
UIViewController myLoginViewController = [[MyLoginViewController alloc] init withNibNamed:"MyLoginViewController"]; //Or whatever you instantiation is
[myTabViewController presentModalViewController:myLoginViewController animated:YES];
And to dismiss it (Hide it)
//This should be done from the original View Controller i.e. myTabViewController preferably in a delegate called by the modal view controller.
[self dismissModalViewControllerAnimated:YES];
Documentation on modalViewControllers:
http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/ModalViewControllers/ModalViewControllers.html
The way that I did it for one of my apps is to just add them in the correct order. Add your tabbar controller to your window, then add the login controller over the top of the tab bar. Then show your window. The user won't see anything but your login controller. Once you login, you can just remove the login controller from view.
This way is probably best if you have information you need to hide until login. The other way is to only launch the login view only. On successful login, remove the login and add the tab bar controller. Either way is fine.
Presenting modally is probably the easiest, but requires a view in place before presenting. So if the data and view under the login controller isn't that sensitive, you could consider this option.
Another way would be using LoginViewControllerDelegate in your appDelegate.h file
In your .h
#import "yourLoginViewController"
//and add LoginViewControllerDelegate
Then in your .m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
yourLoginViewController *loginView = [[yourLoginViewController alloc] initWithNibName:#"yourLoginViewController" bundle:nil];
loginView.delegate = self;
[window addSubview:loginView.view];
[window makeKeyAndVisible];
}
//add this one
- (void)loginViewControllerDidFinish:(yourLoginViewController *)loginViewController {
[window addSubview:tabBarController.view];
}
I have been having some trouble with the UITabBar and cannot find anything online in regards to the subject. Pretty much I want to display a view (say TestView) and a TabBar that contains to other views: Green View and Red View. So initially I want TestView displayed with a tabBar on the bottom with 2 tabs, one for Green view and one for Red View, once one of those tabs are touched the appropriate view will be displayed, but there will be no tab for the TestView
But heres the MainAppDelegate code and a picture of what I get
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//Create the TabBar VC and ButtonSelect VC
testView = [[TestViewController alloc] init];
tabBarController = [[UITabBarController alloc] init];
//Create the viewcontroller's For the TabBarController
UIViewController *gvc = [[GreenViewController alloc] init];
UIViewController *rvc = [[RedViewController alloc] init];
//Make a array to containing the two viewcontrollers (for TabBar)
NSArray *viewControllers = [NSArray arrayWithObjects:gvc, rvc, nil];
//Attach the VC's to the TabBar
[tabBarController setViewControllers:viewControllers];
//Set to window
[window addSubview:[tabBarController view]];
[window addSubview:[testView view]];
[window makeKeyAndVisible];
[rvc release];
[gvc release];
return YES;
}
And This is what I get..
Please help
Adjust the frame of your testView. For example,
testView = [[TestViewController alloc] initWithFrame: CGRectMake(
0.0, 20.0, 320.0, 421.0)];
I used "magic numbers" here, but you had better get the height of the status bar and tab bar.
to the comment
So you want to dismiss the test view when the user selects one of the tab. You can catch the moment when a tab is selected by setting a delegate to the UITabBarController and implement tabBarController:didSelectViewController:` method. Basically, you will dismiss the test view in this method.
One way of doing it (and without changing your code much) is to set your application delegate as the delegate of the UITabBarController, (tabBarController.delegate = self;). Then implement tabBarController:didSelectViewController:, where you remove the test view from your application window and do tabBarController.delegate = nil;.
my first xib contains a ScrollView with a springboard like interface in MainWindow.xib:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
navController = [[UINavigationController alloc] init];
[navController setNavigationBarHidden:YES];
[window addSubview:navController.view];
[window sendSubviewToBack:navController.view]; }
When a button is clicked the FirstViewController appears with a tableview and a navigation controller:
- (void) buttonPushed:(id)sender {
FirstViewController *firstViewController = [[FirstViewController alloc] init];
[navController pushViewController:firstViewController animated:YES];
[firstViewController release];
[window addSubview:navController.view]; }
When I click the back button in Navigation Controller to go back to springboard, I get the springboard xib, but unresponsive to touches with a Navigation Bar on top!
- (void)goHome:(id) sender {
[self.view removeFromSuperview];
How can I go back to springboard screen (mainwindow.xib) without having the navigation bar stacked on top, and be responsive to touches ?
Why don't you set the springboard view to be the root view controller of your navigation controller and get rid of any UI in the window?
I think that the window shouldn't have any UI elements accept view of view controllers that are added to it (by navigation controller or by tab bar controller).
This way you won't have to reinvent the wheel for the first view to load from the springboard view and the back button will work properly.
You can set the navigationBarHidden property to false in the viewDidLoad method of the root view controller (the view controller of the springboard view).
Did you try calling [navController setNavigationBarHidden:YES]; in your mainview viewWillAppear callback ?
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
UIViewController *rootController = [[MyRootViewController alloc] init];
navigationController = [[UINavigationController alloc]
initWithRootViewController:rootController];
[rootController release];
window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[window addSubview:navigationController.view];
[window makeKeyAndVisible];
}