why is my view all black after initiating a simple "performSegueWithIdentifier"? - ios

Question

I'm just attempting to initiate a simple segue programmatically, but for some reason, when I do so, the destination view is just all black, and when I go back via the navigation controller, it turns the rest of my views black as well. Here is the segue in my IB:
And this the code for the segue, through a button in the master controller:
#IBAction func buttonPressed(sender: AnyObject) {
self.performSegueWithIdentifier("showLoading", sender: self)
}
however when I run the app and press the button, the segue works but the view is just black:
and every view previous is black as well.. but i have notices every time i switch back and forth between the tabs, the views are regular and not this black screen. Why is this unusual behavior occurring?

Answer 1

Once I disable the sizeclass of my storyboard.
Change one of popover segue to push segue.
Then I enable the sizeclass,this segue is the same as yours in storyboard ,so is the problem .
After I change this segue back to popover segue, everything works fine again.
This is how I fix this problem ,but I don't know why.
And the following is my code in presentedviewcontroller:
// MARK: - Navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == Constants.EditWaypointSegue {
if let waypoint = (sender as? MKAnnotationView)?.annotation as? EditableWaypoint {
if let ewvc = segue.destinationViewController.contentViewController as? EditWaypointViewController {
if let ppc = ewvc.popoverPresentationController {
let coordinatePoint = mapView.convertCoordinate(waypoint.coordinate, toPointToView: mapView)
ppc.sourceRect = (sender as! MKAnnotationView).popoverSourceRectForCoordinatePoint(coordinatePoint)
let minimumSize = ewvc.view.systemLayoutSizeFittingSize(UILayoutFittingCompressedSize)
ewvc.preferredContentSize = CGSize(width: Constants.EditWaypointPopoverWidth, height: minimumSize.height)
ppc.delegate = self
}
ewvc.waypointToEdit = waypoint
}
}
}
}
// MARK: - UIAdaptivePresentationControllerDelegate
func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
println("full")
return UIModalPresentationStyle.FullScreen // full screen, but we can see what's underneath
}
func presentationController(controller: UIPresentationController, viewControllerForAdaptivePresentationStyle style: UIModalPresentationStyle) -> UIViewController?
{
let navcon = UINavigationController(rootViewController: controller.presentedViewController)
let visualEffectView = UIVisualEffectView(effect: UIBlurEffect(style: .ExtraLight))
visualEffectView.frame = navcon.view.bounds
navcon.view.insertSubview(visualEffectView, atIndex: 0) // "back-most" subview
return navcon
}