Mine is a normal viewcontroller application. When I click a button on this mainView, it adds a 2nd view(a different xib) as a subview to the mainView. I want this 2nd view to be replaced by a splitview. So it means I should replace the 2nd view controller with a UISplitViewController, isnt it?
Can I do that? Is it possible to add a splitviewcontroller's view like v add a viewcontroller's view?
You should be aware that, currently, the only official usage of UISplitViewController is as a root view controller of an application; Apple does not intend for it to be a child view controller. Apparently, this is due to bugs with handling rotation of the iPad, and may get fixed at a later date. So you should avoid adding a UISplitViewController's view as a subview to anything.
You can subclass UIViewController and then in the init:
UIViewController *left = ...;
UIViewController *right = ...;
UISplitViewController *splitVC = ...;
splitVC.viewControllers = [NSArray arrayWithObjects:left,right,nil];
self.view = splitVC.view;
return self;
Then just use this as a normal UIViewController.
Related
I've a UIViewController which loads it's view form a Xib file. In my AppDelegate.m I would like to initiate my rootViewController with that myViewController and I would like that the title of the navigtionItem is set by taking the NavigationBar view which is part of the Xib file of the myViewController:
MyViewController *myViewController = [[MyViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:myViewController];
According to the documentation
Each time the top-level view controller changes, the navigation controller updates the navigation bar accordingly.
In my setup this seems not to happen or I haven't indicated that my NavigationBar view is actually the navigationBar to consider.
How can I tell the NavigationController to update it's navigationItem content (title, left and right bar buttons) according the NavigationBar view which is part of the Xib file from myViewController?
Update
My Xib layout looks like this:
I know I can set those items in code by:
self.navigationItem.titleView = ...;
self.navigationItem.leftBarButtonItem = ...;
But I want them do design in the Xib file of the ViewController and they should be used in the NavigationController.
In ViewWillAppear method in your ViewController set-
self.navigationItem.title = #"Title name";
Also in the same way you can set self.navigationItem.leftBarButton and RightBarButton items
Adding a UINavigationBar view to the main UIView doesn't do what you think it does. It merely adds a navigation bar view there in the view, it does not tie into the UINavigationController.
If you use a storyboard, you can add the UINavigationItem as a child of the UIViewController. But since you are not using a storyboard, the easiest way to do it is to update the navigationItem in viewDidLoad.
Sidenote: Apple does not recommend using viewDidLoad to setup the navigation item. If you really want to do it the proper way, you can for example do it in the navigationItem getter.
- (UINavigationItem*)navigationItem
{
// get super navigation item
UINavigationItem *navItem = [super navigationItem];
// do stuff
return navItem;
}
I am developing an app in which a UIViewController (firstViewController) contains some UILabels, a UIButton, and a UIView (subView). The UIView should display the UIViewController (secondViewController) that contains some layers. I am unable to do this.
What should I do to display secondViewController within subView of firstViewController?
You should use UIViewController containment or parent/child view controllers. You can read details here.
The most basic version is:
UIViewController *parentVC = ...
UIViewController *otherVC = ... // it's view will be added as subview
[parentVC addChildViewController:otherVC];
[parentVC.containerView addSubview:otherVC.view]; // containerView is a view where your child view controller should go
[otherVC didMoveToParentViewController:parentVC];
If you only add other view controller's view as a subview, child view controller won't receive all the events. For example, if you use other methods suggested here (just add view as subview and nothing more), you won't get -viewDidAppear: message (and others) sent to your child view controller.
You can do that by adding view of another view controller as sub view in view as bellow
SecondVC *aObjSecondVC = [self.storyboard instantiateViewControllerWithIdentifier:#"SecondVC"];
[self.view addSubview:aObjSecondVC.view]
You can add it using the following line:
[self.subView addSubView:secondViewController.view];
I am trying to replace the detailview of a UISplitViewController for a quite a while now, but the solutions I found on the internet wasn't useful.
I am executing this:
DetailViewController* secondVc = [[DetailViewController alloc] init];
NSMutableArray* arr = [[NSMutableArray alloc] initWithArray:self.splitViewController.viewControllers];
[arr replaceObjectAtIndex:1 withObject:secondVc];
[self.splitViewController setViewControllers:arr];
DetailViewController is just a normal UIViewController (is this the problem?) I chose red as its background but I am seeing a completely gray area in the detail view after this code is executed.
What surprises me is that viewDidLoad and viewDidAppear functions are called for the DetailView class, but I can't see it on the screen. The self.view.frame is 0,0,768,1024 although all my settings are in landscape mode in storyboard.
I only want to use this in landscape mode, I don't need a generic solution.
What is the most basic way to change the detail view of a split view controller? I have looked at Apple's MultipleDetailViews but that felt like overkill since most of the code in it is about responding orientation changes, like hiding the master vc etc.
I suspect your problem is using alloc init to instantiate secondVC -- that would work if you made your controller's view in code, or in a xib with the name "DetailViewController". Since it appears that you're using a storyboard, then you should be using,
DetailViewController* secondVc = [self.storyboard instantiateViewControllerWithIdentifier:#"secondVC"]; // be sure to use this same identifier in the storyboard
In storyboard, select the view controller. On the right side, go to "Simulated Metrics" and pick "Detail" for "Size". As for the color, try setting it in viewDidLoad.
I have been trying to use the IIViewDeckController available here but I am having some trouble in this.
I have created a view controller in my storyboard and assigned the class IIViewDeckController and created a segue. In my root view controller I have then set-up the controller with a centre and a left controller using the properties explained in the documentation linked above. I set-up the controller as show below
if([segue.identifier isEqual: #"Deck"])
{
// prepare view controllers
CategoriesViewController* leftController = [[CategoriesViewController alloc] init];
UIViewController* rightController = nil;
ListingViewController* middle = [[ListingViewController alloc] init];
IIViewDeckController* deck = segue.destinationViewController;
deck.centerController = middle;
deck.leftController = leftController;
}
I don't get any errors when I run the code but I am presented with a black screen which does not respond to swipe events nor does it contain my Listing view.
What am I missing?
I just had the same problem.
In your storyboard's scene and in your target view controller, check to make sure that the views are wired up (connected) properly.
I had a tableView with a connection to the view controller's parent view as well as to the tableView itself.
Making sure that there was only one connection and that it was only to the view controller's tableView solved the issue.
in my iPad-app I am trying to present one of my views with a modal formsheet-style.
Here's some code:
-(void)present
{
SecondViewController *modal = [[SecondViewController alloc]init];
modal.modalPresentationStyle = UIModalPresentationStyleFormSheet;
[self presentModalViewController:modal animated:YES];
}
I am using Storyboard, and I have put stuff like a textView and toolbars in the view I'd like to show. I have set the right class in Identity Inspector, and in the class-files I have checked that it's the right view appearing with putting NSLog(#"Right view");
When calling the void present, a view is appearing, but only as a dark-white square. Nothing og my content from Storyboard is in it, I even tried changing the background color of the view and the textView to see if something was just outside the square, but the whole thing stayed white. It feels like it's not using the view I created in storyboard, but I have set it to the correct class, and the NSLog gets printed out when calling it. I have not connected the two views in any way in Storyboard, the SecondViewController is just floating around, so that might be the problem? The button that calls for -(void)present is created programmatically, so I can't ctrl+drag it to the button either.
Why is it showing an empty version of my class?
In the "Identity Inspector" set a "Storyboard ID" for your ViewController, and then present it like this:
-(void)present
{
SecondViewController *modal = [self.storyboard instantiateViewControllerWithIdentifier:#"myStoryboardID"];
modal.modalPresentationStyle = UIModalPresentationStyleFormSheet;
[self presentModalViewController:modal animated:YES];
}
And if you're using iOS6, presentModalViewController:animated: is deprecated, so use this:
-(void)present
{
SecondViewController *modal = [self.storyboard instantiateViewControllerWithIdentifier:#"myStoryboardID"];
modal.modalPresentationStyle = UIModalPresentationStyleFormSheet;
[self presentViewController:modal animated:YES completion:nil];
}
Your problem is that you're assuming the program will intrinsically know where to find the, already laid out, view for this controller when that's simply not how storyboards work. The code you list about will create a view controller, but without an associated view it will simply show as a black square.
There's a few ways to solve your dilemma:
Add the modal transition as a segue in the view controller, this would be the simplest way and is what iOS storyboards expect you to do.
Move the view from the storyboard to an external .xib and call the initWithNibName:bundle: method to load this as your view controller's view. This is the best solution if you just want to programmatically load the view.
Load the view from your storyboard programmatically with the instantiateViewControllerWithIdentifier: method, this is probably a bad idea as it goes against the design of storyboards.
I can elaborate on those if you want.