从iPhone中的PrimaryOverlay动画到PrimaryHidden时，隐藏UiSplitView中的灰色框 [英] Hide gray box in UiSplitView when animating to PrimaryHidden from PrimaryOverlay in iPhone

问题描述

这里有很多答案描述如何以编程方式为主分割视图设置动画：

There are numerous answers here that describe how to programmatically animate the primary split view:

let addButton = self.splitViewController!.displayModeButtonItem()
UIApplication.sharedApplication().sendAction(addButton.action, to: addButton.target, from: nil, forEvent: nil)

在iPad上这非常有用！但是在iPhone上有一个令人烦恼的灰色盒子，它可以追踪主视图。通过将该动作包装在UIView.animate块中，可以非常清楚地看到它：

On an iPad this works wonderfully! But on an iPhone there is this annoying gray box that trails the primary view. By wrapping that action in a UIView.animate block, its possible to see it quite clearly:

当您通过点击详细视图实际关闭主视图时，该框几乎不可见，但是当您以编程方式关闭它时真的很烦人。

The box is hardly visible when you actually dismiss the primary view by tapping over the detail view, but is really annoying when you programmatically dismiss it.

如何删除这个令人讨厌的视图？

How can I remove this annoying view?

推荐答案

在我敲了几天之后，我找到了一个< a href =https://stackoverflow.com/q/26164982/1633251>相关答案显示罪魁祸首是 _UIPopoverSlidingChromeView 视图。我能找到的唯一解决方案类似于上述主题的解决方案：在动画期间隐藏该视图。

After banging my head on this for several days, I found a related answer that showed the culprit is the _UIPopoverSlidingChromeView view. The only solution I could find is similar to the solution of the above topic: to hide that view during the animation.

var foundChrome = false
var view: UIView! = self.view
var popView: UIView!

let displayModeButton = self.splitViewController!.displayModeButtonItem()

while view != nil {
   //print("View: ", Mirror(reflecting: view).subjectType, " frame: \(view.frame)")

   if let sv = view {
      if Mirror(reflecting: sv).description.containsString("Popover") { // _UIPopoverView
         for v in sv.subviews {
            //print("SV: ", Mirror(reflecting: v).subjectType, " frame: \(v.frame)")
            if Mirror(reflecting: v).description.containsString("Chrome") {
               foundChrome = true
               popView = v
               popView.hidden = true
               break
            }
         }
         if foundChrome { break }
      }
   }
   view = view.superview
}
if foundChrome {
   let duration: NSTimeInterval = 2.0
   UIView.animateWithDuration(duration, animations: { () -> Void in
      UIApplication.sharedApplication().sendAction(displayModeButton.action, to: displayModeButton.target, from: nil, forEvent: nil)
   })
   // must do this separately, doing in a completion block doesn't work, as it takes affect too soon
   let t = dispatch_time(DISPATCH_TIME_NOW, Int64(duration * NSTimeInterval(NSEC_PER_SEC)))
   dispatch_after(t, dispatch_get_main_queue()) {
      popView.hidden = false
   }
}

我意识到这有些深奥，但如果你遇到你会很乐意以任何方式解决这个问题。

I realize this is somewhat esoteric, but if you experience the problem you will be happy for any way to work around it.

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