I am making an login screen. I have the following storyboard.
What I'm doing in code is. If there is a username and password stored on the device. Than passViewController pops up. Else login viewcontroller pops up. This works fine.
The problem I have is that LoginViewController and PassViewController should have a transparent background. I know how to do this with a single xib file but I want to do this in my storyboard so that I can use my segues from Login and Passviewcontroller to the nextController. At the moment I'm doing this in code.
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"LoginViewController"];
vc.view.backgroundColor = [UIColor clearColor];
self.modalPresentationStyle = UIModalPresentationCurrentContext;
[self presentModalViewController:vc animated:YES];
Can anybody help me how I can achieve this.
Kind regards.
If my understanding is correct, you just need to click on your view controller's view, for instance, your LoginViewController's view. That's the 1st view in your controller's views hierarchy. Then in the attributes inspector, on your screen's right side, you can set the view's background colour to 'clear colour'. Is that what you're looking for?
Related
I have a swrevealcontroller on my storyboard.I move to different view controller by passing selecting the view controller name in the table view.Now i am also showing a new table view when i tap on one of the item of tableview in swrevealcontroller.In select of new tableview item i want to show a new view controller which will not be part of the swrevealcontroller.But i am not able to show this.
I have tried this code but it does not show the back button when new view controller is shown.
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UINavigationController *vc = (UINavigationController *)[storyboard instantiateViewControllerWithIdentifier:#"DetailController"];
[self presentViewController:vc animated:YES completion:nil];
Thanks in advance.
It's because presentViewController present a viewcontroller as a modal one. Secondly, even if you switch from presentViewController to pushviewcontroller an error will be thrown due to the fact that UINavigationController can not be pushed by another UINavigationController.
My app is designed using a UITabBarController and im trying to present a view on top of that (a login screen) from the app delegate. When i use the following code:
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
tabBarController = [[UITabBarController alloc] initWithNibName:#"Main_TabBarController" bundle:nil];
self.window.rootViewController = tabBarController;
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
Login_ViewController *lvc = [storyboard instantiateViewControllerWithIdentifier:#"Login_ViewController"];
[self.window.rootViewController presentViewController:lvc animated:YES completion:nil];
I get the error Warning: Attempt to present <Login_ViewController: 0x716fac0> on <UITabBarController: 0x7165240> whose view is not in the window hierarchy! and the screen is just black. How do i add Login_ViewController to the window hierarchy?
You can always grab the current root viewcontroller and use it to present your login controller.
UIViewController *presentingController = [[[[UIApplication sharedApplication] delegate] window] rootViewController];
[presentingController presentViewController:viewController animated:YES completion:nil];
In addition, depending on how I want my login screen to look, I will push the login controller using UIModalPresentationFormSheet.
viewController.modalPresentationStyle = UIModalPresentationFormSheet;
You're using two different mechanisms for creating your UI. You should move your tab bar controller into the storyboard. When you instantiate your storyboard, it overwrites your window with a new instance and the first controller as the root controller.
The error message is telling you the tab bar controller's view is not in the view hierarchy, not the other way around.
I would create a controller with a view consisting of just your application logo and inside of this controller determine whether you need to go to the login screen or not (if you have persistent logins). Then from the login screen transition to the tab bar controller.
Unless the storyboard you're loading isn't the main storyboard, you shouldn't need to load it manually. You should be able to set the storyboard as the main one for the application and iOS will load it automatically.
I'm having problem with accessing my tabbarcontroller in the storyboard when its not the initial view. So basically there is an initial view in the storyboard which leads to the tabbarcontroller. I want to change the color of the tab but i dont have access to it! I know that it can be added to the delegate if its the initial view but in this case its not the initial view in the storyboard! I read somewhere that I have to override a method in the first view but there was no detail about it!
If you are in a viewcontroller in the storyboard then this code:
UIStoryboard *storyboard = self.storyboard;
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"OtherViewController"];
Will get the other viewcontroller youw want and you could do things such as:
set yourself as delegate for it:
[(OtherViewController *)vc setDelegate:self];
display it:
[self presentViewController:vc animated:YES completion:nil];
I think you could use this to get the other viewcontroller and then access the tabbar from it.
Sorry if I misunderstood what you are trying to do.
Hey guys i`m trying to present a modal view controller inside an application with a tab bar controller. The problem is, every time the new view is presented, it on top of my tab bar.
I need to keep my tab bar even when the view is presented. Like google maps application does with his toolbar at the bottom of the screen.
How can i do that?
Thank you
By default, a modal view controller is meant to take up the entire screen (on an iPhone/iPod, at least). Because of this, it covers whatever you have on screen at the time.
A view controller presented via modal segue is meant to live on its own. If you want to keep your Navigation and TabBar, then just use a push segue to present the new ViewController. Remember to use this kind of segue, your presenting controller needs to be part of a UINavigationController already.
Use this to push a ViewController. If it is a UINavigationController it will push its linked RootViewController by itsself.
Create a viewController to push: (Using Storyboard)
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"LoginViewController"];
or (Using Code/Nibs)
LoginViewController *viewController = [[LoginViewController alloc] init]; //initWithNibNamed in case you are using nibs.
//in case you want to start a new Navigation: UINavigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
and push with:
[self.navigationController pushViewController:vc animated:true];
Also, if you are using Storyboards for the segues you can use this to do all the stuff. Remember to set the segue identifier.
[self performSegueWithIdentifier:#"pushLoginViewController" sender:self]; //Segue needs to exist and to be linked with the performing controller. Only use this if you need to trigger the segue with coder rather than an interface object.
- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"pushLiftDetail"]) {
[[segue.destinationViewController someMethod:]];
segue.destinationViewController.someProperty = x;
}
}
I think you'll need to add a UITabBar to the modal view and implement/duplicate the buttons and functionality that your main bar has. The essence of a modal window is it has total control until it is dismissed.
You might try putting your UITabBarController into a NavBarController, but I'm not certain that this will work.
UITabBarController -> NavBarController -> Modal View
I am in the appdelegate of my application. How can I add a modal view controller in the "didfinishlaunching" method?
I tried the following but did not work
SomeViewController *vc = [[SomeViewController alloc]init];
[self.tabController.navigationController presentModalViewController:vc animated:NO];
EDIT:
I changed my implementation to the following
self.tabController.selectedViewController
= [self.tabController.viewControllers objectAtIndex:0];
SomeViewController *vc = [[SomeViewController alloc]init];
[self.tabController.selectedViewController presentModalViewController:vc animated:NO];
I checked that the 'selected view controller' is not null... however I am still not able to get the output I needed. Is there anything I am missing?
Assuming tabController and navigationController are not nil, the applicationDidFinishLaunching may be too soon to display the modal view controller.
Make sure you put that code after you make the window key and visible. [self.window makeKeyAndVisible];
If that does not work try listening for the UIWindowDidBecomeKeyNotification for that window
You can try delaying presentation of that modal a few seconds using performSelector:withObject:afterDelay: