Here's my setup. I have a viewcontroller that I'm creating and adding as a subview. The viewcontroller presents some options that a user can chose from. The viewcontroller is being pushed in response to a "long press" gesture. Within the viewcontroller, I added a child UIView to group some other controls together so I can move them around the screen as a unit and, when they are displayed, center them on the location of the long press. Here is the code that instantiates the view controller, changes its location, and adds it as a subview:
UserOptions *opts = [[UserOptions alloc] initWithNibName:#"UserOptions" bundle:nil];
[opts recenterOptions:location];
[self.view addSubview:opts.view];
That bit of code does create and push the viewcontroller, but the call to recenterOptions doesn't do anything. Here is that method:
- (void) recenterOptions:(CGPoint)location {
CGRect oldFrame = self.optionsView.frame;
CGFloat newX = location.x; // + oldFrame.size.width / 2.0;
CGFloat newY = location.y; // + oldFrame.size.height / 2.0;
CGRect newFrame = CGRectMake(newX, newY, oldFrame.size.width, oldFrame.size.height);
self.optionsView.frame = newFrame;
}
Note that self.optionsView is the child UIView that I added to the viewcontroller's nib.
Does anyone know why I'm unable to change the location of the UIView?
Regards,
Eric
A couple things. First, try adding the view to the view hierarchy before calling -recenterOptions:
UserOptions *opts = [[UserOptions alloc] initWithNibName:#"UserOptions"
bundle:nil];
[self.view addSubview:opts.view];
[opts recenterOptions:location];
Next, just set the center of the view instead of trying to change its frame:
- (void) recenterOptions:(CGPoint)location {
[[self optionsView] setCenter:location];
}
Are you verifying that your optionsView is valid (non-nil)?
I agree with Rob, btw. You need to change your title to match your question.
Views are loaded lazily. Until you call self.view, the view is not loaded and optionsView is nil, hence self.optionsView.frame = newFrame does nothing.
Related
I got an gridview. Each cell within that grid is clickable. If a cell is clicked, another viewcontroller must be presented as a modal viewcontroller. The presentedviewcontroller must slide in fro the right to the left. After that, the modalviewcontroller can be dismissed with a slide. How do i achieve this? I got some images to show it :
Both views are separate viewcontrollers.
[Solution]
The answer from Matthew pointed me in the right direction. What i needed was a UIPanGestureRecognizer. Because UISwipeGestureRecognizer only registers one single swipe and i needed the view to follow the users finger. I did the following to accomplish it :
If i cell is tapped inside my UICollectionView, the extra view needs to pop up. So i implemented the following code first :
/* The next piece of code represents the action called when a touch event occours on
one of the UICollectionviewCells.
*/
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
NSString* release_id = releases[indexPath.row][0];
// Next boolean makes sure that only one new view can be seen. In the past, a user can click multiple cells and it allocs multiple instances of ReleaseViewController.
if(releaseViewDismissed) {
// Alloc UIViewController and initWithReleaseID does a request to a server to initialize some data.
ReleaseViewController *releaseViewController = [[ReleaseViewController alloc] initWithReleaseID: release_id];
// Create a new UIView and assign the height and width of the grid
UIView *releaseViewHolder = [[UIView alloc] initWithFrame:CGRectMake(gridSize.width, 0, gridSize.width, gridSize.height)];
// Add the view of the releaseViewController as a subview of the newly created view.
[releaseViewHolder addSubview:releaseViewController.view];
// Then add the UIView with the view of the releaseViewController to the current UIViewController's view.
[self.view addSubview:releaseViewHolder];
// Place the x coordinate of the new view to the same as width of the screen. Then after that get the x to 0 with an animation.
[UIView animateWithDuration:0.3 animations:^{
releaseViewHolder.frame = CGRectMake(0, 0, releaseViewHolder.frame.size.width, releaseViewHolder.frame.size.height);
// This is important. alloc an UIPanGestureRecognizer and set the method that handles those events to handleSwipes.
_panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(handleSwipes:)];
// Add the UIPanGestureRecognizer to the created view.
[releaseViewHolder addGestureRecognizer:_panGestureRecognizer];
releaseViewDismissed = NO;
}];
}
}
Then my handleSwipes is as follows:
-(void)handleSwipes:(UIPanGestureRecognizer *)sender {
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view];
CGPoint translation = [sender translationInView:sender.view];
CGRect newFrame = [sender view].frame;
[sender setTranslation:CGPointZero inView:sender.view];
if (sender.state == UIGestureRecognizerStateChanged)
{
newFrame.origin.x = newFrame.origin.x + translation.x;
// Makes sure it can't go beyond the left of the screen.
if(newFrame.origin.x > 0) {
[sender view].frame = newFrame;
}
}
if(sender.state == UIGestureRecognizerStateEnded){
CGRect newFrame = [sender view].frame;
CGFloat velocityX = (0.3*[(UIPanGestureRecognizer*)sender velocityInView:self.view].x);
// If the user swipes less then half of the screen, it has to bounce back.
if(newFrame.origin.x < ([sender view].bounds.size.width/2)) {
newFrame.origin.x = 0;
}
// If a user swipes fast, the velocity is added to the new x of the frame.
if(newFrame.origin.x + velocityX > ([sender view].bounds.size.width/2)) {
newFrame.origin.x = [sender view].bounds.size.width + velocityX;
releaseViewDismissed = YES;
}
// Do it all with a animation.
[UIView animateWithDuration:0.25
animations:^{
[sender view].frame = newFrame;
}
completion:^(BOOL finished){
if(releaseViewDismissed) {
// Finally remove the new view from the superView.
[[sender view] removeFromSuperview];
}
}];
}
}
If you want the presented view controller to slide in from the right to the left, it cannot be a modal view. #Juan suggested one way to achieve the right to left and swipe back, but it would result in the grid view being pushed out of the way by the new view. If you would like the new view to cover the grid view when it slides in, you will either need to accept the vertical slide of modal views or write your own code to slide the view in from the right -- the latter would not actually be all that difficult*.
As for the swipe to get back, the easiest way to do that from either a modally presented view or a view you animate in yourself is to use a UISwipeGestureRecognizer. You create the recognizer, tell it what direction of swipe to look for, and you tell it what method to call when the swipe occurs.
*The gist of this approach is to create a UIView, add it as a subview of the grid view, and give it the same frame as your grid view but an x-position equal to the width of the view, and then use the following code to make the view animate in from the right.
[UIView animateWithDuration:0.3 animations:^{
slidingView.frame = CGRectMake(0, 0, slidingView.frame.size.width, slidingView.frame.size.height);
}];
I believe what you need is the following:
Create another controller that is going to handle navigation between these two (ContentViewController for example). This controller should have a ScrollView with paging enabled.
Here is a simple tutorial if you don´t already know how to do this: click here
Once the cell is clicked you have to:
Create the new ViewController to be shown.
Enable paging and add this ViewController to the ContentViewController
Force paging to this newly created ViewController
Additionally you have to add some logic so that when the user swipes to change back to the first page, paging is disabled until a new cell is clicked to repeat the process.
I have made a custom UIView which is shown when the user hits a button in the navigationbar. I make my view's in code. In my loadview I set the autoresizing masks and the view loads correct on screen. However the UIView which is shown when the user taps the button does not resize even when I have set the autoresizing masks.
UIView *blackView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 416.0)];
blackView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
Do I need to use self.view.frame.size.width and self.view.frame.size.height instead? And if I do why? Does not resizing masks work outside of loadView?
Thank you for your time:)
the autoresizingMask affects how a view will behave when its superviews frame changes. if all you are doing is showing theblackViewwhen you tap a button, thenblackView` will have whatever frame you initially set for it.
If this isn't enough info, please post some more code around how you are configuring and displaying blackView and it's superview and explain more about what situations you are expecting blackView to resize in. Rotation is one of them, if that's what you're concerned with.
First things first, I hope you've done this:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
Let's say the view that needs resizing is: view2
The view that has view2 as a subview is: view1
While creating view1 you would declare it as:
view1 = [[UIView alloc] init];
[view1 setNeedsLayout];
Now in view1's .m file you need to overload the layoutSubviews method as shown:
- (void)layoutSubviews
{
CGRect frame = view2.frame;
// apply changes to frame
view2.frame = frame;
}
In case view1 is a view controller's view, you need to do that same thing as above in the willRotate method as shown
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
[super willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];
CGRect frame = view2.frame;
// apply changes to frame
view2.frame = frame;
}
This is a tried and tested method that I use to handle orientation changes.
I'm writing an iPhone app that (like most apps) supports auto-rotation: You rotate your phone, and its views rotate and resize appropriately.
But I am assigning a custom view to navigationItem.titleView (the title area of the navigation bar), and I can't get that view to resize correctly when the phone rotates.
I know what you're thinking, "Just set its autoresizingMask to UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight," but it's not that simple. Of course, if I don't set my view's autoresizingMask, then my view doesn't resize; and I want it to resize.
The problem is, if I do set its autoresizingMask, then it resizes correctly as long as that view is visible; but the titleView's size gets messed up in this scenario:
Run the app, with the phone held in portrait mode. Everything looks good.
Do something that causes the app to push another view onto the navigation stack. E.g. click a table row or button that causes a call to [self.navigationController pushViewController:someOtherViewController animated:YES].
While viewing the child controller, rotate the phone to landscape.
Click the "Back" button to return to the top-level view. At this point, the title view is messed up: Although you are holding the phone in landscape mode, the title view is still sized as if you were holding it in portrait mode.
Finally, rotate the phone back to portrait mode. Now things get even worse: The title view shrinks in size (since the navigation bar got smaller), but since it was already too small, now it is much too small.
If you want to reproduce this yourself, follow these steps (this is a bit of work):
Make an app using Xcode's "Navigation-based Application" wizard.
Set it up so that the top-level table view has rows that, when you click them, push a detail view onto the navigation stack.
Include this code in both the top-level view controller and the detail view controller:
- (BOOL)shouldAutorotateToInterfaceOrientation:
(UIInterfaceOrientation)interfaceOrientation {
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
Include this code in only the top-level view controller:
- (void)viewDidLoad {
[super viewDidLoad];
// Create "Back" button
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#"Master"
style:UIBarButtonItemStylePlain target:nil action:nil];
self.navigationItem.backBarButtonItem = backButton;
[backButton release];
// Create title view
UILabel* titleView = [[[UILabel alloc] initWithFrame:CGRectMake(0,0,500,38)] autorelease];
titleView.textAlignment = UITextAlignmentCenter;
titleView.text = #"Watch this title view";
// If I leave the following line turned on, then resizing of the title view
// messes up if I:
//
// 1. Start at the master view (which uses this title view) in portrait
// 2. Navigate to the detail view
// 3. Rotate the phone to landscape
// 4. Navigate back to the master view
// 5. Rotate the phone back to portrait
//
// On the other hand, if I remove the following line, then I get a different
// problem: The title view doesn't resize as I want it to when I:
//
// 1. Start at the master view (which uses this title view) in portrait
// 2. Rotate the phone to landscape
titleView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
self.navigationItem.titleView = titleView;
}
Finally, follow my repro steps.
So ... am I doing something wrong? Is there a way to make my titleView always resize correctly?
You should also set the contentMode of the UIImageView to get the titleView properly displayed in landscape and/or portrait mode :
imgView.contentMode=UIViewContentModeScaleAspectFit;
The whole sequence: (self is a UIViewController instance)
UIImageView* imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"myCustomTitle.png"]];
imgView.autoresizingMask=UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
imgView.contentMode=UIViewContentModeScaleAspectFit;
self.navigationItem.titleView = imgView;
[imgView release];
I had something similar - but it was returning (popping) to root view controller. Ultimately, I went with the following for popping:
[[self navigationController] setNavigationBarHidden:YES animated:NO];
[[self navigationController] popViewControllerAnimated:YES];
[[self navigationController] setNavigationBarHidden:NO animated:NO];
And it worked. There may have been a better way but - after all the hours I'd already spent on this issue - this was good enough for me.
I dealt with this same issue by keeping track of the customView's initial frame, then toggling between that and a scaled CGRect of the initial frame in a -setLandscape method on a UIButton subclass. I used the UIButton subclass as navigationItem.titleView and navigationItem.rightBarButtonItem.
In UIButton subclass -
- (void)setLandscape:(BOOL)value
{
isLandscape = value;
CGFloat navbarPortraitHeight = 44;
CGFloat navbarLandscapeHeight = 32;
CGRect initialFrame = // your initial frame
CGFloat scaleFactor = floorf((navbarLandscapeHeight/navbarPortraitHeight) * 100) / 100;
if (isLandscape) {
self.frame = CGRectApplyAffineTransform(initialFrame, CGAffineTransformMakeScale(scaleFactor, scaleFactor));
} else {
self.frame = initialFrame;
}
}
Then in the InterfaceOrientation delegates I invoked the -setLandscape method on the customViews to change their sizes.
In UIViewController -
- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
[self updateNavbarButtonsToDeviceOrientation];;
}
- (void)updateNavbarButtonsToDeviceOrientation
{
ResizeButton *rightButton = (ResizeButton *)self.navigationItem.rightBarButtonItem.customView;
ResizeButton *titleView = (ResizeButton *)self.navigationItem.titleView;
if (self.interfaceOrientation == UIDeviceOrientationPortrait || self.interfaceOrientation == UIDeviceOrientationPortraitUpsideDown) {
[rightButton setLandscape:NO];
[titleView setLandscape:NO];
} else {
[rightButton setLandscape:YES];
[titleView setLandscape:YES];
}
}
(Answering my own question)
I got this working by manually keeping track of the titleView's margins (its distance from the edges of the navigtion bar) -- saving when the view disappears, and restoring when the view reappears.
The idea is, we aren't restoring the titleView to the exact size it had previously; rather, we are restoring it so that it has the same margins it had previously. That way, if the phone has rotated, the titleView will have a new, appropriate size.
Here is my code:
In my view controller's .h file:
#interface MyViewController ...
{
CGRect titleSuperviewBounds;
UIEdgeInsets titleViewMargins;
}
In my view controller's .m file:
/**
* Helper function: Given a parent view's bounds and a child view's frame,
* calculate the margins of the child view.
*/
- (UIEdgeInsets) calcMarginsFromParentBounds:(CGRect)parentBounds
childFrame:(CGRect)childFrame {
UIEdgeInsets margins;
margins.left = childFrame.origin.x;
margins.top = childFrame.origin.y;
margins.right = parentBounds.size.width -
(childFrame.origin.x + childFrame.size.width);
margins.bottom = parentBounds.size.height -
(childFrame.origin.y + childFrame.size.height);
return margins;
}
- (void)viewDidUnload {
[super viewDidUnload];
titleSuperviewBounds = CGRectZero;
titleViewMargins = UIEdgeInsetsZero;
}
- (void) viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
// Keep track of bounds information, so that if the user changes the
// phone's orientation while we are in a different view, then when we
// return to this view, we can fix the titleView's size.
titleSuperviewBounds = self.navigationItem.titleView.superview.bounds;
CGRect titleViewFrame = self.navigationItem.titleView.frame;
titleViewMargins = [self calcMarginsFromParentBounds:titleSuperviewBounds
childFrame:titleViewFrame];
}
- (void) viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
// Check for the case where the user went into a different view, then
// changed the phone's orientation, then returned to this view. In that
// case, our titleView probably has the wrong size, and we need to fix it.
if (titleSuperviewBounds.size.width > 0) {
CGRect newSuperviewBounds =
self.navigationItem.titleView.superview.bounds;
if (newSuperviewBounds.size.width > 0 &&
!CGRectEqualToRect(titleSuperviewBounds, newSuperviewBounds))
{
CGRect newFrame = UIEdgeInsetsInsetRect(newSuperviewBounds,
titleViewMargins);
newFrame.size.height =
self.navigationItem.titleView.frame.size.height;
newFrame.origin.y = floor((newSuperviewBounds.size.height -
self.navigationItem.titleView.frame.size.height) / 2);
self.navigationItem.titleView.frame = newFrame;
}
}
}
For IOS5 onwards, as this is an old question...This is how I accomplished the same issue with the title text not aligning properly.
[[UINavigationBar appearance] setTitleVerticalPositionAdjustment:2 forBarMetrics:UIBarMetricsLandscapePhone];
Tested on ios5/6 sims works fine.
This is what I did:
self.viewTitle.frame = self.navigationController.navigationBar.frame;
self.navigationItem.titleView = self.viewTitle;
The viewTitle is a view created in the xib, it takes the size of the navigationBar and after it has been added the titleView adjust the size to leave room to the back button. Rotations seem to work fine.
I had had same problem, but I seem to get workaround with following code.
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
UIView *urlField = self.navigationItem.leftBarButtonItem.customView;
CGRect frame = urlField.frame;
frame.size.width = 1000;
urlField.frame = frame;
}
In my case, the custom view is a UITextField, but I hope this will help you.
I have a UITableViewController view a UITableView that I alloc/init with a frame of CGRectZero :
self.tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
I want to add a view at the middle of the tableView (a loading view with a UIActivityIndicatorView and a UILabel), but I don't know how to position it, since I don't know the tableView frame.
x = (self.tableview.frame.size.width - loadingView.frame.size.width) / 2.0;
y = (self.tableview.frame.size.height - loadingView.frame.size.height) / 2.0;
[loadingView setCenter:CGPointMake(x, y)];
I did init my tableView with CGRectZero frame so it can take the whole place available on screen (which it did), but I thought its frame would update or something.
Any ideas ? Thanks !
I managed to estimate to frame programatically. I didn't mentionned that my tableView was between a navigationBar and a tabBar, so here is the code for this case :
CGFloat x = self.navigationController.view.frame.size.width;
CGFloat y = self.navigationController.view.frame.size.height -
self.tabBarController.tabBar.frame.size.height;
self.tableView = [[UITableViewController alloc] initWithFrame:CGRectMake(0.0, 0.0, x, y)];
And the code posted above for the positionning of the loadingView works like a charm !
I'm open ton better solutions, of course
You could give your LoadingView a reference to the view it is to appear over. Then when it is about to be shown, it can check the frame of the view it is representing to center and match that view and add itself as a subview of the TableView's superview:
- (void)show
{
self.center = targetView.center;
[[targetView superview] addSubview:self];
}
Another option is to have the LoadingView use KVO to monitor the UITableView's frame and adjust it's own frame accordingly.
If your View Controller is a UITableViewController then the frame of the table view is the same as the frame of the UIViewController.
Why don't you put it in the center of the UIViewController's view?
Assuming self is the UITableViewController:
loadingView.center = self.view.center;
I'm trying to do something that shouldn't be that complicated, but I can't figure it out.
I have a UIViewController displaying a UITableView. I want to present a context menu when the user press on a row. I want this to be a semi-transparent view with labels and buttons.
I could use an AlertView, but I want full control on the format of the labels and buttons and will like to use Interface Builder.
So I created my small view 250x290, set the alpha to .75 and create a view controller with the outlets to handle the different user events.
Now I want to present it.
If I use presentModalViewController two (undesired) things happen
1) the view covers all of the screen (but the status bar).
2) It is semi-transparent, but what I see "behind" it its not the parent view but the applications root view.
Ive tried adding it as a subview, but nothing happens, so Im not doing something right:
RestaurantContextVC* modalViewController = [[[RestaurantContextVC alloc] initWithNibName:#"RestaurantContextView" bundle:nil] autorelease];
[self.view addSubview:modalViewController.view];
Is it possible to do what I want?
Thanks in advance.
Gonso
I'm coding similar thing. My approach include.....
Not using dismissModalViewControllerAnimated and presentModalViewController:animated.
Design a customized full sized view in IB. In its viewDidLoad message body, set the background color to clearColor, so that space on the view not covered by controllers are transparent.
I put a UIImageView under the controllers of the floating view. The UIImageView contains a photoshoped image, which has rounded corners and the background is set to transparent. This image view serves as the container.
I uses CoreAnimation to present/dismiss the floating view in the modal view style: (the FloatingViewController.m)
- (void)viewDidLoad
{
[super viewDidLoad];
[self.view setBackgroundColor:[UIColor clearColor]];
[UIView beginAnimations:nil context:nil];
[self.view setFrame:CGRectMake(0, 480, 320, 480)];
[UIView setAnimationDuration:0.75f];
[self.view setFrame:CGRectMake(0, 0, 320, 480)];
[UIView commitAnimations];
}
wangii
Thats pretty much the solution I found.
I load the view with loadNibNamed and then just add it on top with addSubView, like this:
//Show a view on top of current view with a wait indicator. This prevents all user interactions.
-(void) showWaitView{
NSArray* nibViews = [[NSBundle mainBundle] loadNibNamed:#"WaitView" owner:self options:nil];
#ifdef __IPHONE_2_1
waitView = [ nibViews objectAtIndex: 0];
#else
waitView = [ nibViews objectAtIndex: 1];
#endif
CGFloat x = self.view.center.x - (waitView.frame.size.width / 2);
CGFloat y = self.view.center.y - (waitView.frame.size.height / 2);
[waitView setFrame:CGRectMake(x,y,waitView.bounds.size.width,waitView.bounds.size.height)];
[self.view addSubview:waitView];
}
Could you elaborate on points 3 and 4?
What I did to give the view the round rect aspect is put it inside a round rect button.
This code will actually allow you to have a small floating view, but if the view is smaller that its parent, the user could interact with the visible part of the parent.
In the end I create my view with the same size, but kept the code just in case.
Gonso
I would strongly consider using a navigation controller to slide in your subview instead of overlaying it. This is the expected model and any small benefit you may think you'll get by doing it your own way will be greatly offset by the principle of (least) surprise.
If you really really have to do it this way, I believe the trick is to add the first table view as a subview of a transparent "holding" view that the view controller maintains. Then add your new sub view as another subview of that.
Again, if you really want to do this, instead of adding a transparent "holding" view, since this pop-up is essentially modal, I would make it a subview directly of the window.
You might want to put in a transparent black shield behind it to prevent touches on the background and focus input on the popup.
But seriously, consider either popping a controller on the stack or using that alert view. Unless you've hired a $$ designer, it's probably not going to look appropriate on the iPhone.
What I did was create a UIViewController on top of my UINavigation controller in my app delegate and made it a property of a singleton object for convenience:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//--- create root navigation controller
self.window.rootViewController = self.navigationController;
//--- create view controller for popups:
popupViewController = [[BaseViewController alloc] init];
popupViewController.view.backgroundColor = [UIColor clearColor];
popupViewController.view.hidden = true; //for rendering optimisation
[self.window addSubview:popupViewController.view];
[AppState sharedInstance].popupViewController = self.popupViewController;
//--- make all visible:
[self.window makeKeyAndVisible];
return YES;
}
At any point in my app, I can then call e.g.
MyViewController * myVC = [[UIViewController alloc] init];
//... set up viewcontroller and its view...
// add the view of the created view controller to the popup view:
[AppState sharedInstance].popupViewController.view.hidden = false;
[[AppState sharedInstance].popupViewController.view addSubview:myVC.view];
The BaseViewController used on the top just inherits from UIViewController and sets up a full-screen view:
//----- in BaseViewController implementation
- (void)loadView {
//------- create root view:
CGRect frame = [[AppState sharedInstance] getScreenFrame];
rootView = [[VCView alloc] initWithFrame:frame];
rootView.backgroundColor = [UIColor whiteColor];
self.view = rootView;
}