如何在IOS Swift中以编程方式呈现pop？

Question

我的目标是以编程方式将UIViewController呈现为一个popover。

如您所见，转换样式设置为Cross Dissolve，演示文稿设置为Over current context。所以从技术上讲，如果我点击按钮，过渡将起作用，我的目标是以编程方式进行。

func clickButton() {
     //What should I do here?   


 }

如何在clickButton上以编程方式显示popover？

Answer 1

如果您以模态方式呈现视图控制器。你可以这样做。

func clickButton() {
    if let vc = self.storyboard?.instantiateViewController(withIdentifier:"YOUR_VIEW_CONTROLLER_ID") {
        vc.modalTransitionStyle   = .crossDissolve;
        vc.modalPresentationStyle = .overCurrentContext
        self.present(vc, animated: true, completion: nil)
    }
}

Answer 2

你可以试试这个：

let rateViewController = RatePopupVC()
rateViewController.modalTransitionStyle = .crossDissolve
rateViewController.modalPresentationStyle = .overCurrentContext
self.present(rateViewController, animated: true, completion: nil)

如果要以编程方式关闭它

PopupVC内部

self.dismiss(animated: true, completion: nil)

Answer 3

试试这个：

func clickButton() {

    let vc : PopupVC = storyboard!.instantiateViewControllerWithIdentifier("PopupVCID") as! PopupVC
    vc.modalTransitionStyle   = UIModalTransitionStyleCrossDissolve;
    self.presentViewController(vc, animated: true, completion: nil)
}

Answer 4

请尝试以下代码。

let popupview = storyboard?.instantiateViewController(withIdentifier: "YourViewController")
popupview.view.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height)
self.addChildViewController(popupview)
self.view.addSubview(popupview.view)
popupview.didMove(toParentViewController: popupview)