ios - UIPopoverPresentationController 显示为全窗口弹出

Question

这个问题在 Swift 4 之前已经被问过 3 次了，我想我也遇到了类似的问题。

我的 UIPopoverPresentationController 在纵向 + 横向显示为全窗口弹出窗口，添加 .None 没有解决问题。我通过 xcode 使用 iPhone 6 作为模拟器。

这是我所拥有的:

@objcMembers class ViewController: UITableViewController, UIGestureRecognizerDelegate, UIPopoverPresentationControllerDelegate {

    func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "settingsPopoverSegue" {

        let buttonItemView = settingsButton.value(forKey: "view")
        let viewForSource = (buttonItemView as! UIView)
        popoverPresentationController?.sourceView = viewForSource

        let popoverViewController = segue.destination
        popoverViewController.popoverPresentationController!.delegate = self
        popoverViewController.modalPresentationStyle = UIModalPresentationStyle.popover

        popoverViewController.popoverPresentationController?.sourceRect = CGRect(x: view.center.x, y: view.center.y, width: 0, height: 0)
        popoverViewController.popoverPresentationController?.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)
    }
}

    func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {

        return UIModalPresentationStyle.none
    }
}

我将 segue 从 Storyboard 上的 uibarbutton 连接到 popoverViewController。

更新了上面的代码 - 好吧，所以我添加了一个 sourceView，但弹出窗口仍然向上滑动全屏。我一定还遗漏了什么。有什么想法吗？

第二次更新:将其置于设置栏按钮的操作中，iphone 仍然显示全屏:

@IBAction func settingsTapped(segue: UIStoryboardSegue, sender: UIBarButtonItem) {

    if segue.identifier == "settingsPopoverSegue" {

        let buttonItemView = settingsButton.value(forKey: "view")
        let viewForSource = (buttonItemView as! UIView)
        popoverPresentationController?.sourceView = viewForSource

        let popoverViewController = segue.destination
        popoverViewController.popoverPresentationController!.delegate = self
        popoverViewController.modalPresentationStyle = UIModalPresentationStyle.popover

        popoverViewController.popoverPresentationController?.sourceRect = CGRect(x: view.center.x, y: view.center.y, width: 0, height: 0)
        popoverViewController.popoverPresentationController?.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)
    }
}

Answer 1

请给一个源矩形打开它。如果您想从特定点打开它，请提供源代码 View 。

 let buttonItemView = YourBarButtonItem.value(forKey: "view")
 et buttonItem = (buttonItemView as! UIView)
 popoverPresentationController?.sourceRect = Your Rect
 popoverPresentationController?.sourceView = buttonItem