Just followed the iOS 8+ example and applied it to an image view and it shows a completely black view. Any ideas?

    if let imageView = self.bannerImage {
        let blurView = DynamicBlurView(frame: imageView.bounds)
        blurView.blurRadius = 10
        imageView.addSubview(blurView)
    }

EDIT: This is called from awakeFromNib()

Hello! I'm trying to add this lib to an app where we have an UICollectionView and when I scroll through the cells, some of them turn into a black box for a fraction of the second. And also some of the blurred images go to the wrong cell.

The problem happens when I scroll and change the blurView alpha to 0. (that change is done automatically on scrolling outside a certain offset)

config:

        blurView.frame = textLabel.bounds
        blurView.drawsAsynchronously = true
        blurView.trackingMode = .tracking
        blurView.quality = .low
        blurView.isDeepRendering = true
        blurView.backgroundColor = .white
        blurView.iterations = 2

At UIViewController i add DynamicBlurView as subview. After that i present that View Controller modaly and DynamicBlurView looks like just black view.

` class BlurViewController: UIViewController {

override func viewDidLoad() { super.viewDidLoad() view.backgroundColor = .clear

let blur = DynamicBlurView(frame: CGRect(x: 20, y: 20, width: 300, height: 300))
view.addSubview(blur)
blur.blurRadius = 10
blur.dynamicMode = .common

} `

Hi ! First of all I would like to thank you for this library. After upgrading from 4.1 to 5.0 I get a crash from time to time. I'm using it along with PopupDialog. This is the stack trace. Thank you !

As of the upcoming official Swift 4.2 release, this PR incorporates the changes needed to support 4.2. Before the official release, I would recommend to merge this PR to a dedicated Swift 4.2 branch, which I am not able to do :)

I did not bump version, though, as I think you have a better understanding on how you want to version DynamicBlurView.

Hope that makes sense :)

Doesn't build under latest Xcode 9.3 with Swift 4.1 compiler. Issue related to using private variables from DynamicBlurView extensions - so you just have to make them fileprivate

Hello @KyoheiG3,

'Self' is only available in a protocol or as the result of a method in a class; did you mean 'BlurLayer'?

var current: Self {
        presentation() ?? self
}

Hope for your soonest solutions.

• DynamicBlurView pod version: [5.0.2]
• Xcode version: [11.3]
• Your application language: [Swift-4.2]

I'm running an IOS 9.2 application which includes DynamicBlurView. It had been running without error and I just incurred 18 DynamicBlurView errors which states, "is inaccessible due to 'private' protection level error". How should I correct this issue.

Here's that's spat out in the debugger:

<Error>: CGContextSetInterpolationQuality: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context  and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

Rarely does a black shadow occur

• 1 ， Once in a while appear shadow It's a tricky question, The iPhone 8 Plus and the iPhone 12 Mini have appeared sporadily so far.

When you install this library via carthage, CFBundleVersion is missing because CURRENT_PROJECT_VERSION is not set. This results in "Info.plist file is missing the required key: CFBundleVersion" error when you try to submit your app to the app store.

It looks like there are other libraries having this issue. https://github.com/Flight-School/AnyCodable/issues/20#issuecomment-493263003

func renderBelowLayer(_ layer: CALayer, in context: CGContext) { let layers = hideOverlappedLayers(layer.sublayers) layer.render(in: context) "context” may be nil layers.forEach { $0.isHidden = false } }

Exception Type: SIGSEGV Exception Codes: SEGV_ACCERR at 0x16904ee488 Crashed Thread: 0

Thread 0 Crashed: 0 CoreGraphics 0x00000001ed830ddc CGColorGetAlpha + 12 1 QuartzCore 0x00000001f0086bf4 -[CALayer _renderBorderInContext:] + 144 2 QuartzCore 0x00000001f0088b5c -[CALayer renderInContext:] + 1396 3 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 4 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 5 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 6 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 7 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 8 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 9 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 10 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 11 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 12 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 13 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 14 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 15 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 16 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 17 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 18 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 19 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 20 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 21 QuartzCore 0x00000001f0086ea4 -[CALayer _renderSublayersInContext:] + 368 22 QuartzCore 0x00000001f0088b48 -[CALayer renderInContext:] + 1376 23 DynamicBlurView 0x00000001060da560 DynamicBlurView.BlurLayer.render(in: __C.CGContextRef, for: __C.CALayer) -> () (BlurLayer.swift:94) 24 DynamicBlurView 0x00000001060df684 DynamicBlurView.DynamicBlurView.(snapshotImage in _2044C6510BFEB36C5566C936E3D26E26)(for: __C.CALayer, conversion: Swift.Bool) -> __C.UIImage? (DynamicBlurView.swift:142) 25 DynamicBlurView 0x00000001060dffd8 function signature specialization <Arg[0] = Dead> of DynamicBlurView.DynamicBlurView.display(__C.CALayer) -> () (DynamicBlurView.swift:156) 26 DynamicBlurView 0x00000001060df7b4 @objc DynamicBlurView.DynamicBlurView.display(__C.CALayer) -> () (:0) 27 DynamicBlurView 0x00000001060df934 DynamicBlurView.DynamicBlurView.refresh() -> () (DynamicBlurView.swift:180) 28 PopupDialog 0x000000010ae77240 PopupDialog.PresentationController.containerViewWillLayoutSubviews() -> () (PresentationController.swift:58) 29 PopupDialog 0x000000010ae77288 merged @objc PopupDialog.PresentationController.presentationTransitionWillBegin() -> () + 24 30 UIKitCore 0x0000000219386fe4 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1116 31 libobjc.A.dylib 0x00000001eacab454 -[NSObject performSelector:withObject:] + 64 32 QuartzCore 0x00000001f0083db4 -[CALayer layoutSublayers] + 184 33 QuartzCore 0x00000001f00840a0 CA::Layer::layout_if_needed(CA::Transaction*) + 332 34 QuartzCore 0x00000001f0083f1c -[CALayer layoutIfNeeded] + 228 35 QuartzCore 0x00000001f0088690 -[CALayer renderInContext:] + 168 36 DynamicBlurView 0x00000001060da560 DynamicBlurView.BlurLayer.render(in: __C.CGContextRef, for: __C.CALayer) -> () (BlurLayer.swift:94) 37 DynamicBlurView 0x00000001060df684 DynamicBlurView.DynamicBlurView.(snapshotImage in _2044C6510BFEB36C5566C936E3D26E26)(for: __C.CALayer, conversion: Swift.Bool) -> __C.UIImage? (DynamicBlurView.swift:142) 38 DynamicBlurView 0x00000001060de828 DynamicBlurView.DynamicBlurView.didMoveToWindow() -> () (DynamicBlurView.swift:86) 39 DynamicBlurView 0x00000001060de944 merged @objc DynamicBlurView.DynamicBlurView.didMoveToWindow() -> () + 24 40 UIKitCore 0x000000021937e288 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 1604 41 UIKitCore 0x000000021937dedc -[UIView(Internal) _didMoveFromWindow:toWindow:] + 664 42 UIKitCore 0x00000002193712ac __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 156 43 Foundation 0x00000001ec437634 -[NSISEngine withBehaviors:performModifications:] + 112 44 UIKitCore 0x000000021937118c -[UIView(Hierarchy) _postMovedFromSuperview:] + 816 45 UIKitCore 0x0000000219380d20 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1740 46 PopupDialog 0x000000010ae76d74 PopupDialog.PresentationController.presentationTransitionWillBegin() -> () (PresentationController.swift:40) 47 PopupDialog 0x000000010ae77288 merged @objc PopupDialog.PresentationController.presentationTransitionWillBegin() -> () + 24 48 UIKitCore 0x000000021882dc8c __71-[UIPresentationController _initViewHierarchyForPresentationSuperview:]_block_invoke + 2224 49 UIKitCore 0x000000021882b6e0 __56-[UIPresentationController runTransitionForCurrentState]_block_invoke + 468 50 UIKitCore 0x000000021890fa64 __40+[UIViewController _scheduleTransition:]_block_invoke + 24 51 UIKitCore 0x0000000218edd1fc _runAfterCACommitDeferredBlocks + 300 52 UIKitCore 0x0000000218ecb3bc _cleanUpAfterCAFlushAndRunDeferredBlocks + 352 53 UIKitCore 0x0000000218ef9a3c _afterCACommitHandler + 116 54 CoreFoundation 0x00000001eba3a0e8 CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION + 32 55 CoreFoundation 0x00000001eba34be0 __CFRunLoopDoObservers + 412 56 CoreFoundation 0x00000001eba35140 __CFRunLoopRun + 1208 57 CoreFoundation 0x00000001eba34964 CFRunLoopRunSpecific + 448 58 GraphicsServices 0x00000001edc75d8c GSEventRunModal + 104 59 UIKitCore 0x0000000218ed1758 UIApplicationMain + 212 60 VW-R-CLUB Member APP 0x000000010292ffdc main (AppDelegate.swift:20) 61 libdyld.dylib 0x00000001eb4f0fd8 start + 0

crash report:

func render(in context: CGContext, for layer: CALayer) {
    let layers = hideOverlappingLayers(layer.sublayers)
    layer.render(in: context)    <------------------------------ here
    layers.forEach {
        $0.isHidden = false
    }
}


private func snapshotImage(for layer: CALayer, conversion: Bool) -> UIImage? {
    let rect = blurLayerRect(to: layer, conversion: conversion)
    guard let context = CGContext.imageContext(with: quality, rect: rect, opaque: isOpaque) else {
        return nil
    }

    blurLayer.render(in: context, for: layer)  <------------------------------ here

    defer {
        UIGraphicsEndImageContext()
    }

    return UIGraphicsGetImageFromCurrentImageContext()
}


extension DynamicBlurView {
open override func display(_ layer: CALayer) {
    let blurRadius = blurLayer.presentationRadius
    let isFixes = isDeepRendering && staticImage != nil
    if let view = renderingTarget, let image = staticImage ?? snapshotImage(for: view.layer, conversion: !isFixes) {   <------------------------------ here <Arg[0] = Dead> of DynamicBlurView.DynamicBlurView.display(__C.CALayer) -> () (DynamicBlurView.swift:156)
        draw(image, blurRadius: blurRadius, fixes: isFixes, baseLayer: view.layer)
    }
}

}

extension DynamicBlurView {
/// Remove cache of blur image then get it again.
open func refresh() {
    blurLayer.refresh()
    staticImage = nil
    blurRatio = 1
    display(layer) <------------------------------ here
}

Hope you can help me to fix it.

The crash only happens sometimes.

When using this component i keep getting the following log out 20 times a second

[Unknown process name] CGImageCreate: invalid image alphaInfo: kCGImageAlphaNone. It should be kCGImageAlphaNoneSkipLast