Don't snapshot view, use a live blur. Fixes #152

Agrume.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name          = "Agrume"
-  s.version       = "5.5.0"
+  s.version       = "5.6.0"
   s.summary       = "An iOS image viewer written in Swift."
   s.swift_version = "5.0"
 

Agrume/Agrume.swift

@@ -151,8 +151,6 @@ public final class Agrume: UIViewController {
     fatalError("Not implemented")
   }
 
-  private var backgroundSnapshot: UIImage!
-  private var backgroundImageView: UIImageView!
   private var _blurContainerView: UIView?
   private var blurContainerView: UIView {
     if _blurContainerView == nil {
@@ -229,12 +227,10 @@ public final class Agrume: UIViewController {
   ///
   /// - Parameters:
   ///   - viewController: The UIViewController to present from
-  ///   - backgroundSnapshotVC: Optional UIViewController that will be used as basis for a blurred background
-  public func show(from viewController: UIViewController, backgroundSnapshotVC: UIViewController? = nil) {
-    backgroundSnapshot = (backgroundSnapshotVC ?? viewControllerForSnapshot(fromViewController: viewController))?.view.snapshot()
+  public func show(from viewController: UIViewController) {
     view.isUserInteractionEnabled = false
     addSubviews()
-    show(from: viewController)
+    present(from: viewController)
   }
 
   /// Update image at index
@@ -279,10 +275,7 @@ public final class Agrume: UIViewController {
 
   private func addSubviews() {
     view.autoresizingMask = [.flexibleHeight, .flexibleWidth]
-    backgroundImageView = UIImageView(frame: view.frame)
-    backgroundImageView.image = backgroundSnapshot
-    view.addSubview(backgroundImageView)
-
+
     if case .blurred = background {
       blurContainerView.addSubview(blurView)
     }
@@ -291,7 +284,7 @@ public final class Agrume: UIViewController {
     view.addSubview(spinner)
   }
 
-  private func show(from viewController: UIViewController) {
+  private func present(from viewController: UIViewController) {
     DispatchQueue.main.async {
       self.blurContainerView.alpha = 1
       self.collectionView.alpha = 0
@@ -374,7 +367,7 @@ public final class Agrume: UIViewController {
     layout.itemSize = view.bounds.size
     layout.invalidateLayout()
 
-    backgroundImageView.frame = view.bounds
+//    backgroundImageView.frame = view.bounds
     spinner.center = view.center
     collectionView.frame = view.bounds
 

Agrume/UIKit+Agrume.swift

@@ -21,27 +21,7 @@ extension CGSize {
 }
 
 extension UIView {
-
-  final func snapshot() -> UIImage {
-    UIGraphicsBeginImageContextWithOptions(bounds.size, true, 0)
-    drawHierarchy(in: bounds, afterScreenUpdates: true)
-    let snapshot = UIGraphicsGetImageFromCurrentImageContext()
-    UIGraphicsEndImageContext()
-    return snapshot!
-  }
-
-  func snapshotView() -> UIView? {
-    UIGraphicsBeginImageContextWithOptions(layer.frame.size, false, 0)
-    defer {
-      UIGraphicsEndImageContext()
-    }
-    guard let context = UIGraphicsGetCurrentContext() else {
-      return nil
-    }
-    layer.render(in: context)
-    return UIImageView(image: UIGraphicsGetImageFromCurrentImageContext())
-  }
-
+
   func usesAutoLayout(_ useAutoLayout: Bool) {
     translatesAutoresizingMaskIntoConstraints = !useAutoLayout
   }

README.md

@@ -160,15 +160,6 @@ let agrume = Agrume(dataSource: dataSource)
 agrume.show(from: self)
 ```
 
-### Custom Background Snapshot
-
-When showing the Agrume view controller, it'll default to taking a snapshot of the root view and blurring that. You can customize this behaviour by passing in a different view that it will blur and display:
-
-```swift
-let agrume = Agrume(image: image)
-agrume.show(from: self, backgroundSnapshotVC: self)
-```
-
 ### Status Bar Appearance
 
 You can customize the status bar appearance when displaying the zoomed in view. `Agrume` has a `statusBarStyle` property: