ios - 横向 iPhone 6 Plus 的 UIModalPresentationPopover 不显示弹出窗口

Question

我想始终在所有设备和所有方向上的弹出窗口中显示一个 ViewController。我试图通过采用 UIPopoverPresentationControllerDelegate 并设置 sourceView 和 sourceRect 来实现这一点。

这适用于所有设备和方向，除了横向的 iPhone 6 Plus。在这种情况下， View Controller 会在表单中从屏幕底部向上滑动。我怎样才能防止它始终出现在弹出窗口中？

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let popoverPresentationController = segue.destinationViewController.popoverPresentationController
popoverPresentationController?.delegate = self
popoverPresentationController?.sourceView = self.titleLabel!.superview
popoverPresentationController?.sourceRect = self.titleLabel!.frame }

func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
return UIModalPresentationStyle.None }

所有设备均在 iOS 8.2 或更高版本下

Answer 1

实现 UIAdaptivePresentationControllerDelegate 的新 adaptivePresentationStyleForPresentationController:traitCollection: 方法:

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller traitCollection:(UITraitCollection *)traitCollection {
    // This method is called in iOS 8.3 or later regardless of trait collection, in which case use the original presentation style (UIModalPresentationNone signals no adaptation)
    return UIModalPresentationNone;
}

UIModalPresentationNone 告诉呈现 Controller 使用原始呈现样式，在您的情况下将显示弹出窗口。