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.
Related
Im trying to return to a specific ViewController in it's current state after going from that ViewController to another using presentViewController.
But when I try to close the other ViewController (with dismissViewController) I get a white screen.
RootViewController *rootViewController
= [[UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil]
instantiateViewControllerWithIdentifier:#"RootViewController"];
[self presentViewController:rootViewController animated:YES completion:nil];
This isn't an option either because that instantiates a new viewcontroller and I want the old ViewController in its current state.
Do I need to pass the RootViewController as an argument when presenting the other ViewController or is there another option to return to the RootViewController in its current state?
Yes, there is a way to return original screen.
I met just like problem but solved it with following code line
[self dismissViewControllerAnimated:YES completion:nil];
one way to address this is to avoid having one view controller responsible for presenting and dismissing the other one.. what you can do is create a controller of controllers (give it a singelton method).. and have that object basically keep a reference to any view controller you are interested in maintaining its state. That way you wouldn't have worry about what's going on behind the scenes when you dismiss or present a view controller.
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?
i want to change display to an UIViewController which has view controller at storyboard from an UIViewController class which hasn't got view controller at storyboard. There is no segue at storyboard for this...
Just like this:
In your AppDelegate.m do a quick setup:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
ViewController *sourceViewController = [[ViewController alloc] init];
UINavigationController * nav = [[UINavigationController alloc] initWithRootViewController:sourceViewController];
[self.window setRootViewController:nav];
return YES;
}
In above example replace ViewController class with your own class of sourceViewCntroller
- (IBAction) didPressMyButton {
NewViewController* newVC = [[[NewViewController alloc] init] autorelease];
[self.navigationController pushViewController:newVC animated:YES];
}
Connect this action to a button on storyboard or embed view change in any method. You will need to setup UINavigation controller first.
I'm not completely sure I understand what you're trying to do, but I think you are asking how to load a view controller from a storyboard, without using a segue, from a method in a view controller that wasn't loaded from the storyboard.
First, in your storyboard, select the view controller you want to load, and open the Identity Inspector. Set the Storyboard ID of the view controller. It looks like you want to load a MapViewController, so let's say you set the storyboard ID to map.
In your code, you can load the view controller like this:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
MapViewController *mapViewController = [storyboard instantiateViewControllerWithIdentifier:#"map"];
Once you have a reference to the view controller, you can set its properties or send it messages. You can then display it in whatever way you want - maybe by pushing it onto a navigation controller, or by presenting it, or by setting it as the root view controller of your window.
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: