uivisualeffectview

I want to fade a UIVisualEffectsView with a UIBlurEffect in and out: var blurEffectView = UIVisualEffectView() blurEffectView = UIVisualEffectView(effect: UIBlurEffect(style: .dark)) I use a normal animation within a function called by a UIButton to fade it in, same for fading out but .alpha = 0 & hidden = true : blurEffectView.hidden = false UIView.animate(withDuration: 1, delay: 0, options: .curveEaseOut) { self.blurEffectView.alpha = 1 } Now, fading in both directions does work but it gives me an error when fading out : <UIVisualEffectView 0x7fdf5bcb6e80> is being asked to animate its

I am trying to blur a MKMapView while also displaying a circle mask above it. To better visualize what I mean with this you can find an image of my current state attached: This shows nearly what I want but the background (the map) should be blurred which is not the case in this picture. I tried to work with UIVisualEffectView, but it seems I am doing something wrong there. Here is what I tried: func createOverlay(at: CGPoint) { var blur: UIView! blur = UIVisualEffectView (effect: UIBlurEffect (style: UIBlurEffectStyle.dark)) blur.frame = self.mapView.frame blur.isUserInteractionEnabled = false

Could someone give a small example of applying the blur to an image? I've been trying to figure out the code for a while now :( still new at obj c! The UIVisualEffectView provides a simple abstraction over complex visual effects. Depending on the desired effect, the results may affect content layered behind the view or content added to the view’s contentView. Apply a UIVisualEffectView to an existing view to apply a blur or vibrancy effect to the exiting view. After you add the UIVisualEffectView to the view hierarchy, add any subviews to the contentView of the UIVisualEffectView . Do not add