Avoid popover adapting to fullscreen in horizontally compact environment

问题

According to documentation,

In a horizontally compact environment, popovers adapt to the UIModalPresentationOverFullScreen presentation style by default.

See below image. In compact environment, popover appear from bottom and animate to top until it covers the entire screen.

Is it possible to override this behaviour and have the popover only covering certain height of the screen as shown below?

Following code demonstrate the default behaviour of popover adapting to FullScreen presentation style in compact environment.

import UIKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = .systemBackground
        
        let button = UIButton()
        button.translatesAutoresizingMaskIntoConstraints = false
        button.setImage(UIImage(systemName: "square.grid.2x2.fill"), for: .normal)
        button.addTarget(self, action: #selector(displayPopover), for: .touchUpInside)
        self.view.addSubview(button)
        
        NSLayoutConstraint.activate([
            button.topAnchor.constraint(equalTo: self.view.topAnchor, constant: 100),
            button.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
            button.widthAnchor.constraint(equalToConstant: 40),
            button.heightAnchor.constraint(equalToConstant: 40),
        ])
        
    }
    
    @IBAction func displayPopover(sender: UIButton!) {
        let popoverVC = PopoverViewController()
        popoverVC.preferredContentSize = CGSize(width: 300, height: 200)
        popoverVC.modalPresentationStyle = .popover
        popoverVC.popoverPresentationController?.sourceView = sender
        popoverVC.popoverPresentationController?.permittedArrowDirections = .up
        self.present(popoverVC, animated: true, completion: nil)
    }
    
    
}

class PopoverViewController: UIViewController {
    override func viewDidLoad() {
        self.view.backgroundColor = .systemGray
    }
}

Output:

Thank you 🙇‍♂️

来源：https://stackoverflow.com/questions/62858550/avoid-popover-adapting-to-fullscreen-in-horizontally-compact-environment

标签

ios

swift

popover