I have two view controllers – AViewController and BViewController. BViewController's view is used for AViewController's subview:
BViewController *bViewController = [mainStoryboard instantiateViewControllerWithIdentifier:#"basic"];
[self.view addSubview: bViewController.view];
...so that I can display BViewController's data on AViewController but handle data in BViewController. In BViewController I use a UIPopOverController when I press some button on it, displaying it like this:
_popOverController = [[UIPopoverController alloc] initWithContentViewController:_popContentView];
[_popOverController presentPopoverFromRect:sender.frame inView:sender.superview permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
I'm getting this warning message:
presenting view controllers on detached view controllers is discouraged
How can I resolve this problem?
Since you are showing UIPopoverController in a subview . Show UIPopoverController in viewcontroller .
Related
In my application i am launching one screen using present UIModalViewController and on that screen I have oneUIButton, if we click on that UIButton alert will come then select yes on alert view now we have to call another view usingpushviewcontroller. But screen is not coming if we use below code can any one help me.
[self.navigationController pushViewController:requestViewController animated:YES];
Try with one root navigation controller and then present your controller modally as follows :
FirstViewController *firstView=[[FirstViewController alloc]init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:firstView];
[self presentViewController:navigationController animated:YES completion:nil];
and then for push another view as follow :
SecondViewController *secondView=[[SecondViewController alloc]init];
[self.navigationController pushViewController:secondView animated:YES];
It will work first using present modal viewController and then using push navigation viewControllers on to the stack.
I am trying to display a simple iPad popover which contains a navigationController with a tableView.
popover -> navigation controller -> view controller -> table view.
I do need the navigationController because on touching the cells I want to push another viewController (within that same popover).
Without the navigation controller, everything is fine.
But as soon as I put the viewController inside a navigationController, the tableView stops responding (didSelectRow doesn't get called). I suppose something is wrong with my delegates but I just can't work it out.
. The navigationController responds fine (I can hit a button I have in the top bar)
. The buttons that are IN the cells respond fine.
. If I touch down and hold on a cell it gets highlighted, but not selected.
UPDATE: I just found out that if I hold the cell down for at least a second, the delegate is called when I release it. any less than that and it is never called...???
Here is the code use:
ModalViewController* controllerWithTable = [[self storyboard] instantiateViewControllerWithIdentifier:identifier];
UINavigationController* navigationController = [[UINavigationController alloc] initWithRootViewController:controllerWithTable];
UIPopoverController* popover = [[UIPopoverController alloc] initWithContentViewController:navigationController];
popover.delegate = self;
[popover presentPopoverFromBarButtonItem:sender permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
If you are using a popoverController to show a table view, you don't need to embed it in a navigation Controller, Instead make a different Viewcontroller with the table view and just shoe that inside a popover controller .I used it somewhat like this..
Make a global reference for UIPopoverController in your app delegate,
//in your Appdelegate.h file declare this
#property(strong, nonatomic) UIPopoverController *popOverForTableView;
Now In the controller which you want to show the PopOver view use this,
TableViewCOntroller* popoverContent = [[TableViewCOntroller alloc] init];
NSString *identifier=#"tableVC"
popoverContent =[[UIStoryboard storyboardWithName:#"Main"
bundle:nil]
instantiateViewControllerWithIdentifier:identifier];
popoverContent.preferredContentSize = CGSizeMake(330, 280);
AppDelegate *appDelegate=(AppDelegate *)[[UIApplication sharedApplication]delegate];
appDelegate. popOverForTableView = [[UIPopoverController alloc]initWithContentViewController:popoverContent];
appDelegate.popOverForTableView.delegate = self;
appDelegate.popOverForTableView.backgroundColor=[UIColor blackColor];
[appDelegate.popOverForTableView presentPopoverFromRect:self.date.frame inView:self.view permittedArrowDirections:(UIPopoverArrowDirectionUp) animated:YES];
You can dismiss it accordingly…,…see if this Helps..
Ok I found the answer there: https://stackoverflow.com/a/18159463/3562952
The tableView was not irresponsive, it was deceptively responding only after a 1-3 seconds hold down.
I had a tap responder on the parent view that was capturing the tap. I am now removing it when displaying the popover and putting back in on dismissal.
I was googling for the wrong symptoms :)
I'm developing a single view iOS 5.0+ app and I'm going to navigate throw my ViewControllers this way:
SearchViewController* search =
[[SearchViewController alloc] initWithNibName:#"SearchViewController"
bundle:nil];
[self presentViewController:search
animated:NO
completion:nil];
My question is, if I'm opening SearchViewController from HomeViewController, is HomeViewController dismissed after SearchViewController is shown?
I have a lot of UIViewControllers and I don't know if all of them will be on memory while user is navigating between them.
If You want to Present Only one Viewcontroller you can try like,
SearchViewController* search =
[[SearchViewController alloc] initWithNibName:#"SearchViewController"
bundle:nil];
[self dismissViewControllerAnimated:NO completion:^{
[self presentViewController:search
animated:NO
completion:nil];
}];
When you present a ViewController from another ViewController, they never get released from memory. To release them from memory you need to explicitly dismiss them.
The method presentViewController:animated:completion: sets the
presentedViewController property to the specified view controller,
resizes that view controller’s view and then adds the view to the view
hierarchy.
So you see you are getting a stack of ViewControllers and adding a View on top of another.
In my app i present a UINavigationController modally with a UIViewController as its rootViewController. I do it in form style. I added a second UIViewController which is also in form style and i can push to it fine. However when i perform a popViewController action after the second UIViewcontroller gets popped onto the first, the whole modally presented UIViewController gets dismissed. However i don't perform any dismissing and the dismissing function doesn't get triggered by accident either.
Any ideas why it's happening?
Sincerely,
Zoli
EDIT:
That's how i'm presenting the modal viewcontrollers with a navcontroller:
if(!welcomeScreenAlreadyPresented) {
welcomeScreenViewController = [[WAWelcomeViewController alloc]init];
}
welcomeScreenNavController = [[UINavigationController alloc]initWithRootViewController:welcomeScreenViewController];
[welcomeScreenNavController setModalTransitionStyle: UIModalTransitionStyleCrossDissolve];
[welcomeScreenNavController setModalPresentationStyle:UIModalPresentationFormSheet];
[welcomeScreenNavController setNavigationBarHidden:YES animated:NO];
[self.navigationController presentViewController:welcomeScreenNavController animated:YES completion:nil];
That's how i'm navigation in WAWelcomeViewController.m
registerViewController = [[WARegisterViewController alloc]init];
[self.navigationController pushViewController:registerViewController animated:YES];
And in WARegisterViewController.m that's how i pop back
[self.navigationController popViewControllerAnimated:YES];
What you need to do is put the viewController you want to push inside another UINavigationController.
registerViewController = [[WARegisterViewController alloc]init];
UINavigationController *modalNavigationController = [[UINavigationController alloc] initWithRootViewController:registerViewController]; // autorelease if you are not using ARC
[self presentViewController:navController animated:YES completion:^{}];
You might want to add the modalNavigationController as a property to later call popViewControllerAnimated: on it.
When the user clicks a button it presents a new tab bar view controller with two view controllers. Here's how I do that
ACLevelDownloadController *dvc = [[ACLevelDownloadController alloc] initWithNibName:#"ACLevelDownloadController" bundle:[NSBundle mainBundle]];
ACInstalledLevelsController *ivc = [[ACInstalledLevelsController alloc] initWithNibName:#"ACInstalledLevelsController" bundle:[NSBundle mainBundle]];
UITabBarController *control = [[UITabBarController alloc] init];
control.viewControllers = #[dvc, ivc];
dvc.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFeatured tag:0];
ivc.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemDownloads tag:1];
[self presentViewController:control animated:YES completion:nil];
this works fine. I dismiss that view controller with a dismiss method in both the ACLevelDownloadController and ACInstalledLevelsController. That also works fine. What's strange is that the memory usage goes up when I present the view controller
but it never goes back down. If I present it again, it goes up even more
I'm using ARC. Why is the memory that the view controllers use not being released after they are dismissed?
EDIT
The way they are dismissed is both ACLevelDownloadController and ACInstalledLevelsController have IBActions hooked up that call this method when they are clicked
- (void)dismiss:(id)sender{
[self dismissViewControllerAnimated:YES completion:nil];
}
What we can observe from the memory usage graph is that the tabViewController is not being dismissed properly and it builds up in the stack. While dismissing you have to allow the viewController which presented the tabViewController to dismiss it. It is its responsibility to dismiss. Also keep weak references for Outlets and assign any strong references to nil** in viewWillDisapper: . You can present a viewController modally as a temporary interruption to obtain important information from the user. If its not the case here, you can remove presenting modally. Check this link. Hope this helps :)