使用以编程方式创建的UIPopoverPresentationController强制iPhone上的popover

Question

我需要创建一个新的弹出窗口视图,因为在编译期间,Interface Builder中的锚点不可见.

根据这篇文章,实现委托方法将迫使Popover在iPhone上.(由于我不明白的原因)

如帖子所示,它在segue上工作得很好.但我无法以非分段的方式使用它.(Popover确实出现在iPad上)

请帮忙!

代码如下:

func showOptions() {
    let contentView = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("PasteOption") as NewPasteOptionViewController
    contentView.modalPresentationStyle = UIModalPresentationStyle.Popover
    contentView.preferredContentSize = CGSizeMake(200.0, 200.0)
    presentViewController(contentView, animated: true, completion: nil)
    var _popoverPresentationController = contentView.popoverPresentationController!
    _popoverPresentationController.delegate = self
    _popoverPresentationController.permittedArrowDirections = UIPopoverArrowDirection.Any
    _popoverPresentationController.sourceView = view
    _popoverPresentationController.sourceRect = self.navigationItem.titleView!.frame
}
// this function below is never called.
func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
    return UIModalPresentationStyle.None
}

补充说明:

呈现视图控制器在另一视图中呈现为模态表单,并封装在导航控制器中.呈现的视图控制器是自定义表视图控制器.

Answer 1

似乎将该行presentViewController(contentView, animated: true, completion: nil) 移至该函数的末尾将解决该问题.