I am trying to inject a reference to a property in a uitableviewcontroller from my appdelegate. The first is successful - I am able to reference xmppStream from my uitableviewcontroller, but the second appears to destroy the reference somewhere and I'm not sure why.
First - ok, xmppStream in uitableviewcontroller is not nil;
UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
PhoneNumberTableViewController *myViewController = (PhoneNumberTableViewController *)navigationController.topViewController;
[myViewController setXmppStream:[self xmppStream]];
Second - gets a reference but is destroyed i.e. in uitableviewcontroller xmppStream is nil?
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"Main" bundle:[NSBundle mainBundle]];
PhoneNumberTableViewController *tv = [sb instantiateViewControllerWithIdentifier:#"UserRegistration"];
[tv setXmppStream:[self xmppStream]];
Any help would be greatly appreciated.
Thanks
what should try is make a property of PhoneNumberTableViewController and whenever you need to use is use that variable. like
UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
_myViewController = (PhoneNumberTableViewController *)navigationController.topViewController;
[myViewController setXmppStream:[self xmppStream]];
Related
i am using UINavigationController but when i push a view controller just simply by making object of the class the class load but not the components in it.
this is my AppDelegate.m
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
ViewController *vc = [sb instantiateInitialViewController];
UINavigationController *nav = [[UINavigationController alloc] init];
self.window.rootViewController = nav;
nav.viewControllers = #[vc];
and my first UIViewController if action button code is
NextView *next = [[NextView alloc] init];
[self.navigationController pushViewController:next animated:YES ];
it gets to next UIViewController but no internal components are loaded such as - button,textfield,etc.
and if i try this code it give me runtime error
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
NextView *next = [sb instantiateViewControllerWithIdentifier:#"two"];
[self.navigationController pushViewController:next animated:YES ];
make sure that NextView inherit UIViewController and you have given identifier as two to that view controller and you have set class NextView from identity inspector to that viewcontroller.
Hope this will help :)
You could not get outlets (buttons etc.) to be loaded with alloc init in the subclass of UIViewController. You should init it with the xib file, using -initWithNibName:bundle: method. Or you can instantiate it with storyboard.
// You can get current storyboard from the View Controller
UIStoryboard *sb = vc.storyboard;
NextView *next = [sb instantiateViewControllerWithIdentifier:#"two"];
[self.navigationController pushViewController:next animated:YES];
UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
AllListsViewController *controller = navigationController.viewControllers[0];
controller.dataModel = _dataModel;
This is my former code. I can access the AllListsViewController through navigationController since it's the rootViewController.
But now my storyboard changed. I've tried to access the controller the same way, but it wouldn't work.
SWRevealViewController *revealViewController = (SWRevealViewController *)self.window.rootViewController;
UINavigationController *navigationController = (UINavigationController *)revealViewController.frontViewController;
AllListsViewController *controller = navigationController.viewControllers[0];
controller.dataModel = _dataModel;
Maybe it's because I set the frontViewController in storyboard so this revealViewController.frontViewController is nil. But I don't know other ways to access it from AppDelegate.m.
Sorry I can't post any images because of my reputation. Here's my code.https://github.com/liukaiyi54/CheckList
Somebody help me please. I've been tortured by this for days.
Thanks in advance!
Try this:
//This is Main unless you have named your storyboard something different
UIStoryboard *storyBoard =[ UIStoryboard storyboardWithName:#"Main" bundle:nil];
//make sure to put this in "AllListsViewController" in your identifier in the storyboard
UINavigationController *vc = [storyBoard instantiateViewControllerWithIdentifier:#"AllListsViewController"];
UINavigationController *myNavigationController = [[UINavigationController alloc] initWithRootViewController:vc];
self.window.rootViewController = myNavigationController;
This is where you would put your storyboard ID in the blue box:
I have a custom UIPageViewController which contain 5 UIViewControllers, now I would like to navigate from one of those 5 UIViewController, But I can't because in those UIViewControllers have no UINavigationController. Can anyone suggest me , how I can navigate from one those 5 UIViewControllers to other UIViewController?
The code in your - [AppDelegate application:didFinishLaunchingWithOptions:]
might look like this (after checking your skipping condition of course):
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *vc1 = [storyboard instantiateViewControllerWithIdentifier:#"MyAuth"]; //if you assigned this ID is storyboard
UIViewController *vc2 = [storyboard instantiateViewControllerWithIdentifier:#"Login"]; //if you assigned this ID is storyboard
UIViewController *vc3 = [storyboard instantiateViewControllerWithIdentifier:#"Details"];
NSArray *controllers = #[vc1, vc2, vc3];
UINavigationController *navController = (UINavigationController *)self.window.rootViewController;
[navController setViewControllers:controllers];
If you paste just this to - [AppDelegate application:didFinishLaunchingWithOptions:], you'll see that it works immediately.
In my AppDelegates 'didFinishLaunchingWithOptions' function, I have this code in there:
if(loggedIn != nil)
{
MainViewController *mvc = [self.window.rootViewController.storyboard instantiateViewControllerWithIdentifier:#"MainView"];
[self.window setRootViewController:mvc];
}
Second Attempt which didn't work:
if(loggedIn != nil)
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
MainViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"MainView"];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
[self.window setRootViewController:nav];
}
The problem is that when the MainViewController loads, the NavigationHeader is missing. I've tried various methods online and instantiations that basically do the same thing to no avail. I have also tried created a whole new navigationController and adding my view to it, however, that fails as well.
Your setting MainViewController as your root, if this is not a navigation controller, there will be no header when it opens.
Instead create a UINavigationController, set MainViewController as its root and then set the navigation controller as the window root.
e.g.
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"storyboardName" bundle:nil];
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"home"];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
[self.window setRootViewController:nav];
or if you have the navigation controller inside the storyboard then instantiate that. Most likely the initial view controller.
e.g.
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"storyboardName" bundle:nil];
[self.window setRootViewController::[storyboard instantiateInitialViewController]];
not sure if it will be the initial viewController or not, that requires more info of your setup to know.
I am trying the "pass the baton" method for passing the managedObjectContext (MOC) thru multiple views. I have it successfully passed to the rootViewController. From there I move to a tabBarController via presentViewController. I can't seem to find a way to pass the MOC when the tabBarController is pushed.
AppDelegate.m
UIViewController *navigationController = (UIViewController *)self.window.rootViewController;
MyViewController *controller = (MyViewController *) navigationController;
controller.managedObjectContext = managedObjectStore.mainQueueManagedObjectContext;
The main view controller is basically a start up screen that will kick you into a login screen or if you are already logged in, to the tabBarController. Below is where I transition to the tabBarController from within the viewDidAppear method.
MyViewController.m
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
UIViewController *mainTabVC = [storyboard instantiateViewControllerWithIdentifier:#"mainTabVC"];
[mainTabVC setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentViewController:mainTabVC animated:NO completion:nil];
The tabBarController in the storyboard has the identifier "mainTabVC".
I've tried lines like
MyTabBarController.managedObjectContext = self.managedObjectContext;
but I get the error Property 'MOC' not found on object of type MyTabBarController even though I do have the property declared in MyTabBarController.h
Could someone show me a line of code that I can throw in this segue to push the MOC to the tab bar controller.
BTW- I'm utilizing RestKit in this app if that changes the way I should be handling this please let me know.
*****Solution********
To make things clear for any other new guys with the same question. I went from this:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
UIViewController *mainTabVC = [storyboard instantiateViewControllerWithIdentifier:#"mainTabVC"];
[mainTabVC setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentViewController:mainTabVC animated:NO completion:nil];
To this:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
MyTabBarViewController *mainTabVC = [storyboard instantiateViewControllerWithIdentifier:#"mainTabVC"];
mainTabVC.managedObjectContext = self.managedObjectContext;
[mainTabVC setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentViewController:mainTabVC animated:NO completion:nil];
Notice the assignment in the third line and using MyTabBarViewController instead of UIViewController in the second line. BIG thanks again to rdelmar!
Your code is somewhat confusing. Is MyTabBarController the class? It looks like mainTabVC is your instance. You should use that rather than the class, and you should change the type when you instantiate mainTabVC to MyTabBarController, instead of UITabBarController. You also don't need to get the storyboard the way you do, you can just use self.storyboard.
MyTabBarController *mainTabVC = [self.storyboard instantiateViewControllerWithIdentifier:#"mainTabVC"];
mainTabVC.managedObjectContext = self.managedObjectContext;
[mainTabVC setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentViewController:mainTabVC animated:NO completion:nil];