how to use popover controller in iPhone

问题

I couldn't show popover controller as popover in iPhone whereas it works very well with iPad.

Any ideas on how to do that in iPhone.

As far as I have searched I couldn't find any.

anyways to make the popover appear in iphone as it is in iPad is appreciated !

回答1:

Set yourself as the popover view controller's delegate before presenting it, and implement the delegate method adaptivePresentationStyle(for:traitCollection:) to return .none. This will cause the popover to stop adapting on iPhone as a fullscreen presented view controller and turn into an actual popover just like on the iPad.

This is a complete working example that presents the popover in response to a button tap:

class ViewController: UIViewController {
    @IBAction func doButton(_ sender: Any) {
        let vc = MyPopoverViewController()
        vc.preferredContentSize = CGSize(400,500)
        vc.modalPresentationStyle = .popover
        if let pres = vc.presentationController {
            pres.delegate = self
        }
        self.present(vc, animated: true)
        if let pop = vc.popoverPresentationController {
            pop.sourceView = (sender as! UIView)
            pop.sourceRect = (sender as! UIView).bounds
        }
    }
}
extension ViewController : UIPopoverPresentationControllerDelegate {
    func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle {
        return .none
    }
}

来源：https://stackoverflow.com/questions/50427668/how-to-use-popover-controller-in-iphone