弹出 UIViewController

问题描述

我正在尝试制作一个弹出窗口，该弹出窗口将通过按下按钮呈现.尝试按照我在谷歌中找到的说明进行操作，但我的弹出视图以全屏形式呈现，其背景为黑色.这是我的代码:

I'm trying to make a popup which will be presented by pressing a button. Tried to follow instructions which i found in google but my pop view presenting in a full screen and its background is black. Here is my code:

class ViewController: UIViewController, UIPopoverPresentationControllerDelegate {

    @IBAction func someButtonPressed(sender: UIButton) {
        let storyboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let popupVC = storyboard.instantiateViewControllerWithIdentifier("hello") as! popupViewController
        popupVC.modalPresentationStyle = .Popover
        popupVC.preferredContentSize = CGSizeMake(300, 300)
        let pVC = popupVC.popoverPresentationController
        pVC?.permittedArrowDirections = .Any
        pVC?.delegate = self
        pVC?.sourceView = sender
        pVC?.sourceRect = CGRect(x: 100, y: 100, width: 1, height: 1)
        presentViewController(popupVC, animated: true, completion: nil)
    }
}

我做错了什么?

推荐答案

要让您的视图控制器显示为弹出窗口，您应该设置以下内容:

To make your view controller shown as a popup, you should set the following:

popupVC.modalPresentationStyle = .OverCurrentContext
popupVC.modalTransitionStyle = .CrossDissolve

您还应该设计视图控制器的位置和大小，使其看起来像一个弹出窗口.

You should also design your view controller's position, size to make it look like a popup.

这是我之前做的弹出窗口.

Here is my popup that i did before.

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