Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
874 views
in Technique[技术] by (71.8m points)

xcode - How to present a modal atop the current view in Swift

(Xcode6, iOS8, Swift, iPad)

I am trying to create a classic Web-like modal view, where the outside of the dialog box is "grayed-out." To accomplish this, I've set the alpha value of the backgroundColor of the view for the modal to 0.5, like so:

self.view.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.5)

The only problem is that when the modal becomes full-screen, the presenting view is removed. (Ref Transparent Modal View on Navigation Controller).

(A bit irritated at the concept here. Why remove the underlying view? A modal is, by definition, to appear atop other content. Once the underlying view is removed, it's not really a modal anymore. it's somewhere between a modal and a push transition. Wa wa wa... Anyway..)

To prevent this from happening, I've set the modalPresentationStyle to CurrentContext in the viewDidLoad method of the parent controller, and in Storyboard... but no luck.

    self.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
    self.navigationController.modalPresentationStyle = UIModalPresentationStyle.CurrentContext

How do I prevent the presenting view from being removed when the modal becomes full screen?

tyvm.. more info below.

Also in Storyboard, like so (Presentation: Current Context)

enter image description here

Thx for your help... documentation below:

enter image description here

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

First, remove all explicit setting of modal presentation style in code and do the following:

  1. In the storyboard set the ModalViewController's modalPresentation style to Over Current context

img1

  1. Check the checkboxes in the Root/Presenting ViewController - Provide Context and Define Context. They seem to be working even unchecked.

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...