I'm working on an app and I face a problem with UINavigationcontroller.
First in the app delegate I check if the user is logged in, if so I take him to Main screen, if notI take him to the login screen.
This is my code:
UINavigationController *diabetesNavigationController = [UINavigationController alloc];
LoginViewController *loginPage = [[LoginViewController alloc]initWithNibName:#"LoginViewController" bundle:nil];
MainViewController *mainPage = [[MainViewController alloc]initWithNibName:#"MainViewController" bundle:nil];
if ([DataStore instance].userIsLoggedIn)
diabetesNavigationController = [diabetesNavigationController initWithRootViewController:mainPage];
else
diabetesNavigationController = [diabetesNavigationController initWithRootViewController:loginPage];
NSDictionary *navbarTitleTextAttributes = [NSDictionary dictionaryWithObject:[UIColor whiteColor] forKey:NSForegroundColorAttributeName];
[[UINavigationBar appearance]setBarTintColor:[UIColor orangeColor]];
[[UINavigationBar appearance]setTintColor:[UIColor whiteColor]];
[[UINavigationBar appearance]setTitleTextAttributes:navbarTitleTextAttributes];
[self.window setRootViewController:diabetesNavigationController];
The problem when the user logs out, he goes back to loginscreen but without the navigationcontroller.
I made something in MainViewController, which is this:
-(void)viewDidAppear:(BOOL)animated
{
self.navigationItem.title = #"Diabetes";
UIBarButtonItem *settingButton=[[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:#"burger.png"]
style:UIBarButtonItemStylePlain
target:self
action:#selector(onBurger:)];
self.navigationItem.rightBarButtonItem = settingButton;
self.navigationItem.leftBarButtonItem.enabled = YES;
}
So when I logout the user, with this code:
LoginViewController *loginPage = [[LoginViewController alloc]initWithNibName:#"LoginViewController" bundle:nil];
[self.navigationController setViewControllers:[NSArray arrayWithObjects:loginPage, nil] animated:YES];
I get to the login screen but without Navigationcontroller. I tried to set Hidden property to NO in all view delegates, but it still has this issue.
You can try this:
UIWindow *window = [UIApplication sharedApplication].keyWindow;
LoginViewController * loginPage = [[LoginViewController alloc] initWithNibName:#"LoginViewController" bundle:nil];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController: loginPage];
[window.rootViewController presentViewController:nav animated:YES completion:NULL];
Let me know if it works.. :)
Related
In my app I have two tabs that handle different set of functions.
One tab is the user tab, when the user switch to this tab, the tab controller checks whether the user has logged in. If not, it shows a button(LoginBtn) which triggers a log in view controller to show when tapped.
I intend to present the log in controller modally with a navigation bar.
However, the navigation bar is not showing the right button item although I've initiated it.
Here's the code
- (void)clickLoginBtn{
LogginController* _cLogginController = [[LogginController alloc] init];
UINavigationController *_cNavController = [[UINavigationController alloc] initWithRootViewController:_cLogginController];
_cNavController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"取消" style:UIBarButtonItemStylePlain target:self action:#selector(dismissLoginView)];
[_cNavController.navigationItem.rightBarButtonItem setTintColor:kColorWhite];
_cNavController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentViewController:_cNavController animated:YES completion:nil];
}
What could be the problem? Is it possible that is because I present to controller modally?
You have put your buttons to the login controller:
_cLogginController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"取消" style:UIBarButtonItemStylePlain target:self action:#selector(dismissLoginView)];
You shouldn't add navigation items to the navigation controller.
try this code.I think this issue is solved by this code
- (void)clickLoginBtn{
LogginController* _cLogginController = [[LogginController alloc] init];
_cLogginController .hidesBottomBarWhenPushed=No;//You need to add this line
UINavigationController *_cNavController = [[UINavigationController alloc] initWithRootViewController:_cLogginController];
_cNavController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"取消" style:UIBarButtonItemStylePlain target:self action:#selector(dismissLoginView)];
[_cNavController.navigationItem.rightBarButtonItem setTintColor:kColorWhite];
_cNavController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentViewController:_cNavController animated:YES completion:nil];
}
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
DemoViewController * _cLogginController = [[DemoViewController alloc]init];
_cLogginController = [storyboard instantiateViewControllerWithIdentifier:#"DemoViewController"];
_cLogginController .hidesBottomBarWhenPushed = NO;
UINavigationController *_cNavController = [[UINavigationController alloc]initWithRootViewController:_cLogginController];
_cNavController.navigationItem.rightBarButtonItem.tintColor = [UIColor blueColor];
_cNavController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
_cLogginController.navigationItem.title = #"取消";
UIBarButtonItem *flipButton = [[UIBarButtonItem alloc]
initWithTitle:#"Flip"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(flipView:)];
flipButton.tintColor = [UIColor grayColor];
_cLogginController.navigationItem.rightBarButtonItem = flipButton;
[self presentViewController:_cNavController animated:YES completion:nil];
I'm having an LoginViewController which is the RootViewController. This ViewController should not have the TabBar included. The Rest of the ViewController should contain the UITabBar, But it is not showing. If i make the tabBar the rootController it will show the tabBar in the viewcontrollers. This would also make the firsttab the rootviewcontroller which it should not.
My question is then how can i make the loginview the rootViewController without an tabBar and still show the tabBar in the other viewcontrollers?
My code:
tabBarController = [[UITabBarController alloc] init];
MenuViewController *firstTab = [[MenuViewController alloc] initWithNibName:#"MenuViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:firstTab];
FixtureViewController *secondTab = [[FixtureViewController alloc] initWithNibName:#"FixtureViewController" bundle:nil];
UINavigationController *navController2 = [[UINavigationController alloc] initWithRootViewController:secondTab];
WorldCupViewController *thirdTab = [[WorldCupViewController alloc] initWithNibName:#"WorldCupViewController" bundle:nil];
UINavigationController *navController3 = [[UINavigationController alloc] initWithRootViewController:thirdTab];
LoginViewController *loginView = [[LoginViewController alloc] initWithNibName:#"LoginViewController" bundle:nil];
UINavigationController *navController4 = [[UINavigationController alloc] initWithRootViewController:loginView];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = #[navController, navController2, navController3];
navController.tabBarItem.image = [UIImage imageNamed:#"message-7"];
navController2.tabBarItem.image = [UIImage imageNamed:#"football-32"];
navController3.tabBarItem.image = [UIImage imageNamed:#"trophy-32"];
[[UITabBar appearance] setTintColor:[UIColor colorWithRed:110/255.0f green:89/255.0f blue:196/255.0f alpha:1.0f]];
[self.window setRootViewController:navController4];
[self.window makeKeyAndVisible];
What you need to do is transition the application from the LoginViewController to the Tabbar. What I would suggest doing is replacing the LoginViewController with the TabBar as the rootViewController.
Here is some sample code, perform this action in your AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
LoginViewController *loginView = [[LoginViewController alloc] initWithNibName:#"LoginViewController" bundle:nil];
UINavigationController *navController4 = [[UINavigationController alloc] initWithRootViewController:loginView];
[self.window setRootViewController:navController4];
[self.window makeKeyAndVisible];
return YES;
}
-(void)transitionToTabBar
{
// Set the TabBar how you are in your sample code, this is just an example.
[self.window setRootViewController:[[UITabBarController alloc] initWithNibName:#"SomeNib" bundle:Nil]];
[UIView transitionWithView:self.window duration:0.5f options:UIViewAnimationOptionTransitionCurlDown animations:^{
[self.window makeKeyAndVisible];
} completion:nil];
}
You should use main View controller (for MenuViewController) and by using segue you can present another view controller which has TabBar in it.
my original app had 5 home screen views and buttons in the home screens would open different other views.
i am not using storyboards. orignally there were no tabs in the app. then i added tabs to display the home screen using
UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil] ;
UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
UIViewController *viewController3 = [[ThirdViewController alloc] initWithNibName:#"ThirdViewController" bundle:nil];
UIViewController *viewController4 = [[FourthViewController alloc] initWithNibName:#"FourthViewController" bundle:nil];
UIViewController *viewController5 = [[FifthViewController alloc] initWithNibName:#"FifthViewController" bundle:nil];
UINavigationController *navigationController1=[[UINavigationController alloc]initWithRootViewController:viewController1];
[navigationController1.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UINavigationController *navigationController2=[[UINavigationController alloc]initWithRootViewController:viewController2];
[navigationController2.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UINavigationController *navigationController3=[[UINavigationController alloc]initWithRootViewController:viewController3];
[navigationController3.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UINavigationController *navigationController4=[[UINavigationController alloc]initWithRootViewController:viewController4];
[navigationController4.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UINavigationController *navigationController5=[[UINavigationController alloc]initWithRootViewController:viewController5];
[navigationController5.navigationBar setBackgroundImage:[UIImage imageNamed:#"upwhitebg.png"] forBarMetrics:UIBarMetricsDefault];
UITabBarController *tabBarController= [[UITabBarController alloc] init];
tabBarController.viewControllers = #[navigationController1, navigationController2,navigationController3,navigationController4,navigationController5];
//self.window.rootViewController = self.tabBarController;
UIWindow *window = [[UIApplication sharedApplication] delegate].window;
[window addSubview:tabBarController.view]
;
but now when i click the buttons on the homescreen how do i show the views which are outside the tabs ? and how do i comeback from that view to the 5 homescreen tab view.
earlier i was using this code to show the views on button press
listController = [[MenuListController alloc] initWithNibName:#"MenuListController" bundle:nil];
SUP101AppDelegate *delegate6 = [[UIApplication sharedApplication] delegate];
[delegate6.navController pushViewController:listController animated:YES]
You can launch other viewControllers by simply presenting them on the tabController now.
listController = [[MenuListController alloc] initWithNibName:#"MenuListController" bundle:nil];
SUP101AppDelegate *delegate6 = [[UIApplication sharedApplication] delegate];
[self.tabBarController presentViewController:listController animated:YES completion:nil];
you should also set the tabController to be window RootViewController
self.window.rootViewController = tabBarController;
//[window addSubview:tabBarController.view]
I want to Push my viewController on PresentViewController
When i click on button initially i am loading PresentViewController, here is my code.
- (IBAction)JoinClicked:(id)sender{
JoinWithViewController *detail_view_controller = [[JoinWithViewController alloc] initWithNibName:#"JoinWithViewController" bundle:nil];
[self.view.window.rootViewController presentViewController:detail_view_controller
animated:YES
completion:NULL];
}
this works fine, but when i click on button which is there on PresentViewController on click i want to Push my view, but in does not pushes.
Please help, Thanks in advance.
JoinWithViewController *detail_view_controller = [[JoinWithViewController alloc] initWithNibName:#"JoinWithViewController" bundle:nil];
[self.navigationController pushViewController:detail_view_controller animated:YES];
Try like this to push viewController. If you use TabBar do like this in AppDelegate. If you create TabBar Drag and drop means leave that. Create TabBar Programatically like below.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
UITabBarController *tabController = [[UITabBarController alloc]init];
self.viewController = [[CalculatorViewController alloc] initWithNibName:#"CalculatorViewController" bundle:nil];
UITabBarItem *tab_item1 = [[UITabBarItem alloc]init];
//tab_item1.title = #"Calculator";
tab_item1.image = [UIImage imageNamed:#"Calculator.png"];
[self.viewController setTabBarItem:tab_item1];
UINavigationController *nav1 = [[UINavigationController alloc]initWithRootViewController:self.viewController];
ShowPhoneViewController *phone = [[ShowPhoneViewController alloc]init];
UITabBarItem *tab_item2 = [[UITabBarItem alloc]init];
tab_item2.title = #"Latest Mobiles";
tab_item2.image = [UIImage imageNamed:#"Mobile.png"];
[phone setTabBarItem:tab_item2];
UINavigationController *nav2 = [[UINavigationController alloc]initWithRootViewController:phone];
CurrencyConvertorViewController *currency = [[CurrencyConvertorViewController alloc]init];
UITabBarItem *tab_item3 = [[UITabBarItem alloc]init];
tab_item3.title = #"Units Convertor";
tab_item3.image = [UIImage imageNamed:#"Dollar.png"];
[currency setTabBarItem:tab_item3];
UINavigationController *nav3 = [[UINavigationController alloc]initWithRootViewController:currency];
SettingsPageViewController *setting = [[SettingsPageViewController alloc]init];
UITabBarItem *tab_item4 = [[UITabBarItem alloc]init];
tab_item4.title = #"Settings";
tab_item4.image = [UIImage imageNamed:#"Settings.png"];
[setting setTabBarItem:tab_item4];
UINavigationController *nav4 = [[UINavigationController alloc]initWithRootViewController:setting];
tabController.viewControllers = [NSArray arrayWithObjects:nav1, nav2, nav3, nav4, nil];
self.window.rootViewController = tabController;
[self.window makeKeyAndVisible];
return YES;
}
I hope you got now
pushviewcontroller is the feature of UINavigationController where you can push one viewcontroller on another vierw controller. Here you are using a single viewcontroller as a rootviewcontroller so either you must change your rootviewcontroller to UINavigationcontroller or you can use "addSubview method" to add new viewController on the current viewcontroller.
but the better option is to add uinavigationcontroller as a rootviewcontroller.
AppDelegate.m
-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
FirstViewController *first = [[FirstViewController alloc]
initWithNibName:#"FirstViewController" bundle:nil];
UINavigationController *navController =[[UINavigationController alloc]
initWithRootViewController:first];
[self.window setRootViewController:navController];
}
Now when as you want to switch from FirstViewController to SecondViewController on button clicked than you have to use pushviewcontroller
FirstViewController.h
-(void) nextBtnPressed {
SecondViewController *second = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
[self.navigationController pushViewController:second animated:TRUE];
}
I'm doing an app with a Nav bar which will switch between the first and third views (the second and the first ones will be switched by a tab bar).
In the FirstViewController.h:
#property(strong,nonatomic) ThirdViewController *thirdViewController;
In the viewDidLoad method of the FirstViewController I made it:
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Model"
style:UIBarButtonItemStylePlain target:self action:#selector(goToThirdView:)];
And also...
- (void)goToThirdView:(id)sender
{
ThirdViewController *thirdViewController = [[ThirdViewController alloc] initWithNibName:#"ThirdViewController" bundle:nil];
self.thirdViewController = thirdViewController;
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.view cache:YES];
[self.view removeFromSuperview];
[self.view insertSubview:self.thirdViewController.view atIndex:0];
[UIView commitAnimations];
}
My AppDelegate is looking like this:
UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil];
UINavigationController *navigationController1 = [[UINavigationController alloc] initWithRootViewController:viewController1];
UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:navigationController1, viewController2, nil];
self.window.rootViewController = self.tabBarController;
But it's not working, when I click in the button, nothing happens. Any idea ?
Thank you in advance.
You should leave the selector for the button as goToThirdView:, but make that method look like this:
- (void)goToThirdView:(id)sender {
ThirdViewController *thirdViewController = [[ThirdViewController alloc] initWithNibName:#"ThirdViewController" bundle:nil];
[self.navigationController pushViewController:thirdViewController animated:YES];
}