Custom size for Modal View loaded with Form Sheet presentation

Question

I\'m trying to load a UIViewController in iPad with Form Sheet presentation. The problem is the size of this new view, i put the size values in the IBuilder but the modal view t

Answer 1

In Attributes inspector check Use Preferred Explicit Size

Answer 2

EDIT

Use preferredContentSize.

Old

You can try this for show view in center

HelpViewController * viewController = [[[HelpViewController alloc] init] autorelease];
viewController.modalPresentationStyle=UIModalPresentationFormSheet;
viewController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentViewController:viewController animated:YES completion:^{
    viewController.view.superview.frame = CGRectMake(0, 0, 200, 200);
    viewController.view.superview.center = self.view.center;
}];

Answer 3

My solution is based heavily on other solutions posted here but since I had to try many different things to get it to actually work I am posting it. Mine is for iOS 10 with Swift 3.1 in a portrait-mode only app. (Untested in landscape mode) The goal of my solution was to display a modal that was smaller than the presenting view, and such that I could see the presenting view in the background.

I had to configure the UIViewController properly in Interface Builder or my code wouldn't work. Here are my settings. I found my solution to work with both Cross Dissolve and Cover Vertical transition styles. I think the key for me in IB was the Over Full Screen for Presentation - it didn't appear to work with some other values for this setting.

Here is the code in the UIViewController I want to present modally. Then I just call it using present(_:animated:completion:) elsewhere. Also, in the VC I will present modally, I have a bool, didLayout initialized as false:

override func viewWillLayoutSubviews() {
        super.viewWillLayoutSubviews()

        if !didLayout {

            let width:CGFloat = self.view.bounds.width * 0.95 //modify this constant to change the amount of the screen occupied by the modal
            let height:CGFloat = width * 1.618 //golden ratio

            self.view.superview!.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.15) //slightly dim the background to focus on the modal
            let screen = self.view.superview!.bounds
            let frame = CGRect(x: 0, y: 0, width: width, height: height)
            let x = (screen.size.width - frame.size.width) * 0.5
            let y = (screen.size.height - frame.size.height) * 0.5
            let mainFrame = CGRect(x: x, y: y, width: frame.size.width, height: frame.size.height)

            self.view.frame = mainFrame

            didLayout = true
        }
    }

Answer 4

For iOS 8, use:

self.preferredContentSize = CGSizeMake(width, height);

I've placed this in viewDidLoad.

Swift 3

self.preferredContentSize = CGSize(width: 100, height: 100)