Autocomplete: tweaks to view hierarchy

App/Autocomplete/AutocompleteViewController.swift

@@ -30,6 +30,8 @@ class AutocompleteViewController: UIViewController, UICollectionViewDelegate
     }
     
     public let collectionView: UICollectionView
+    
+    private let autocompleteView: AutocompleteView
     private let dataSource: UICollectionViewDiffableDataSource<Section, HistoryItem>
     
     init() {
@@ -49,6 +51,8 @@ class AutocompleteViewController: UIViewController, UICollectionViewDelegate
             collectionView.dequeueConfiguredReusableCell(using: cellRegistry, for: indexPath, item: item)
         })
         
+        autocompleteView = AutocompleteView(collectionView: collectionView)
+        
         super.init(nibName: nil, bundle: nil)
         
         collectionView.delegate = self
@@ -58,7 +62,7 @@ class AutocompleteViewController: UIViewController, UICollectionViewDelegate
     required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }
     
     override func loadView() {
-        self.view = collectionView
+        self.view = autocompleteView
     }
     
     // MARK: UICollectionViewDelegate
@@ -70,4 +74,24 @@ class AutocompleteViewController: UIViewController, UICollectionViewDelegate
             delegate?.autocompleteController(self, didSelectHistoryItem: item)
         }
     }
+    
+    private class AutocompleteView: UIView {
+        let collectionView: UICollectionView
+        
+        init(collectionView: UICollectionView) {
+            self.collectionView = collectionView
+            super.init(frame: .zero)
+            
+            addSubview(collectionView)
+        }
+        
+        required init?(coder: NSCoder) {
+            fatalError("init(coder:) has not been implemented")
+        }
+        
+        override func layoutSubviews() {
+            super.layoutSubviews()
+            collectionView.frame = bounds
+        }
+    }
 }