development: added convenience to CollectionView

Sources/iOS/CollectionView.swift

@@ -102,11 +102,18 @@ open class CollectionView: UICollectionView {
     
     /**
      An initializer that initializes the object.
+     - Parameter collectionViewLayout: A UICollectionViewLayout reference.
+     */
+    public convenience init(collectionViewLayout layout: UICollectionViewLayout) {
+        self.init(frame: .zero, collectionViewLayout: layout)
+    }
+	
+	/**
+     An initializer that initializes the object.
      - Parameter frame: A CGRect defining the view's frame.
      */
-	public init(frame: CGRect) {
-		super.init(frame: frame, collectionViewLayout: CollectionViewLayout())
-		prepare()
+	public convenience init(frame: CGRect) {
+		self.init(frame: frame, collectionViewLayout: CollectionViewLayout())
 	}
 	
 	/// A convenience initializer that initializes the object.

Sources/iOS/CollectionViewController.swift

@@ -71,7 +71,7 @@ open class CollectionViewController: UIViewController {
     
     open override func viewWillLayoutSubviews() {
         super.viewWillLayoutSubviews()
-        collectionView.frame = view.bounds
+        layoutSubviews()
     }
     
     /**
@@ -87,6 +87,11 @@ open class CollectionViewController: UIViewController {
         view.contentScaleFactor = Screen.scale
         prepareCollectionView()
     }
+    
+    /// Calls the layout functions for the view heirarchy.
+    open func layoutSubviews() {
+        layoutCollectionView()
+    }
 }
 
 extension CollectionViewController {
@@ -95,6 +100,14 @@ extension CollectionViewController {
         collectionView.delegate = self
         collectionView.dataSource = self
         view.addSubview(collectionView)
+        layoutCollectionView()
+    }
+}
+
+extension CollectionViewController {
+    /// Sets the frame for the collectionView.
+    fileprivate func layoutCollectionView() {
+        collectionView.frame = view.bounds
     }
 }
 

Sources/iOS/NavigationController.swift

@@ -108,8 +108,7 @@ open class NavigationController: UINavigationController {
     
     open override func viewWillLayoutSubviews() {
         super.viewWillLayoutSubviews()
-        navigationBar.setNeedsLayout()
-        navigationBar.layoutIfNeeded()
+        layoutSubviews()
     }
     
 	/**
@@ -133,6 +132,12 @@ open class NavigationController: UINavigationController {
 			v.delegate = self
 		}
 	}
+    
+    /// Calls the layout functions for the view heirarchy.
+    open func layoutSubviews() {
+        navigationBar.setNeedsLayout()
+        navigationBar.layoutIfNeeded()
+    }
 }
 
 extension NavigationController: UINavigationBarDelegate {