Information tab completed; cells now dynamically size correctly

2019-07-17 13:05:24 +02:00
parent 347317a5e7
commit 92e3fed7e6
7 changed files with 268 additions and 42 deletions
@@ -14,9 +14,76 @@ class MenuViewCell: MagazineLayoutCollectionViewCell {
    
    @IBOutlet weak var content: UILabel!
    
-    override func awakeFromNib() {
+    private var widthConstraint: NSLayoutConstraint!
+    
+    public override init(frame: CGRect) {
+        super.init(frame: frame)
+        
+        contentView.translatesAutoresizingMaskIntoConstraints = false
+        
+        let bottomConstraint = bottomAnchor.constraint(equalTo: contentView.bottomAnchor)
+        bottomConstraint.priority = .required - 1
+        NSLayoutConstraint.activate(
+            [
+                leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
+                trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
+                topAnchor.constraint(equalTo: contentView.topAnchor),
+                bottomConstraint
+            ]
+        )
+        
+        widthConstraint = widthAnchor.constraint(equalToConstant: bounds.width)
+        widthConstraint.priority = .required - 1
+        widthConstraint.isActive = true
+    }
+    
+    required public init?(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+    }
+    
+    override open func awakeFromNib() {
        super.awakeFromNib()
-        // Initialization code
+        
+        contentView.translatesAutoresizingMaskIntoConstraints = false
+        
+        let bottomConstraint = bottomAnchor.constraint(equalTo: contentView.bottomAnchor)
+        bottomConstraint.priority = .required - 1
+        NSLayoutConstraint.activate(
+            [
+                leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
+                trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
+                topAnchor.constraint(equalTo: contentView.topAnchor),
+                bottomConstraint
+            ]
+        )
+        
+        widthConstraint = widthAnchor.constraint(equalToConstant: bounds.width)
+        widthConstraint.priority = .required - 1
+        widthConstraint.isActive = true
+    }
+    
+    override open func preferredLayoutAttributesFitting(
+        _ layoutAttributes: UICollectionViewLayoutAttributes)
+        -> UICollectionViewLayoutAttributes
+    {
+        guard let attributes = layoutAttributes as? MagazineLayoutCollectionViewLayoutAttributes else {
+            assertionFailure("`layoutAttributes` must be an instance of `MagazineLayoutCollectionViewLayoutAttributes`")
+            return super.preferredLayoutAttributesFitting(layoutAttributes)
+        }
+        
+        let size: CGSize
+        if attributes.shouldVerticallySelfSize {
+            widthConstraint.constant = layoutAttributes.size.width
+            
+            size = super.preferredLayoutAttributesFitting(layoutAttributes).size
+        } else {
+            // No self-sizing is required; respect whatever size the layout determined.
+            size = layoutAttributes.size
+        }
+        
+        layoutAttributes.size = size
+        
+        return layoutAttributes
    }

 }