iPad custom size of modal view controller

Question

I have a couple of modal view controllers of certain size. I\'m trying to avoid the use of custom views (creating full screen black translucent overlay over current view, ad

Answer 1

I obtained the following result (link text) by using:

self.modalPresentationStyle = UIModalPresentationFormSheet;

and by presenting it as a modal view controller. Let me know if you need further help.

Answer 2

This is my solution for a NOT autolayout view (never tried with autolayout) and compliant with iOS 7 and iOS 8.

At first be sure to call the modal view in this way:

CloudSettingsViewController *cloudController = [[CloudSettingsViewController alloc] initWithNibName:@"CloudSettingsView" bundle:nil];

CGRect originalBounds = cloudController.view.bounds;

cloudController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
cloudController.modalPresentationStyle = UIModalPresentationFormSheet;

[self presentViewController:cloudController animated:YES completion:nil]; 

With iOS 8 set the preferredContentSize in the viewDidLoad method of the modal view.

- (void)viewDidLoad {
    [super viewDidLoad];

    // backup of the original size (selected in interface builder)
    height = self.view.frame.size.height;
    width = self.view.frame.size.width;

    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8) // versioni successive ios 8
        self.preferredContentSize = CGSizeMake(width, height); // this is necessary to get the correct size of the modal view
}

This works ALSO when the modal view needs to display the keyboard on iPad.

With previous versions of iOS 8 you should set the bounds after presentViewController call:

[currentController presentViewController:controlPanelController animated:YES completion:nil];
if ([[[UIDevice currentDevice] systemVersion] floatValue] < 8) 
    cloudController.view.superview.bounds = originalBounds;//it's important to do this after 

Answer 3

One solution is to use UIModalPresentationPageSheet to present a page sheet and then immediately resize the modal view. This is fully explained in this answer to another question.

Answer 4

This solution worked for me as I had the same issue.

My modal view structure is the following (I use UIModalPresentationCurrentContext at both presenting and presented controllers to achieve transparency in the presented VC)

ModalViewController
  > UIView (view) - resized to the same size as the presenting controller but has semi-translucent background - done automatically
      >> UIView (contentView) - the true view with the content of the popup - this is the one that got consistently placed at the top of the screen all the time

In ModalViewController I overwrote the following method to fix the positioning issue:

- (void) viewWillLayoutSubviews(){
  [super viewWillLayoutSubviews];

  CGRect r = self.view.bounds();
  self.contentView.center = CGPointMake(r.size.width/2,r.size.height/2);
}

I actually create and size the content view first but in different method.

Hope this helps someone.

Answer 5

The approaches described above need to be tweaked for iOS7:

// set desired bounds, then call -presentFromViewController:

@implementation PresentedViewController
{
    CGRect _presentationBounds;
}

- (void)presentFromViewController:(UIViewController *)viewController
{
    self.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
    self.modalPresentationStyle = UIModalPresentationFormSheet;

    _presentationBounds = self.view.bounds;

    [viewController presentViewController:self animated:YES completion:nil];
}

- (void)viewWillLayoutSubviews
{
    [super viewWillLayoutSubviews];

    if (!CGRectIsEmpty(_presentationBounds))
    {
        self.view.superview.bounds = _presentationBounds;
        _presentationBounds = CGRectZero;
    }
}

(This code also works on iOS6.)

Answer 6

The best way to do this is to change the bounds property on the superview of the view being presented inside the formsheet. When you present a view modally, the presented view is embedded inside another view.

You should set the bounds property of the superview to the same rect as the view's bounds. First add a private ivar in your class:

@implementation MySpecialFormsheet {
    CGRect _realBounds;
} 

It's best to do this in viewWillAppear:. Add the following code to the view controller that is being presented modally:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    self.view.superview.bounds = _realBounds;
}

You need to cache _realBounds in your viewDidLoad method:

- (void)viewDidLoad {
    _realBounds = self.view.bounds;
    [super viewDidLoad];
}