Initial version

Reusable.swift

@@ -0,0 +1,63 @@
+import UIKit
+
+protocol Reusable: class {
+  static var reuseIdentifier: String { get }
+  static var nib: UINib? { get }
+}
+
+extension Reusable {
+  static var reuseIdentifier: String { return String(Self) }
+  static var nib: UINib? { return nil }
+}
+
+extension UITableView {
+  func registerReusableCell<T: UITableViewCell where T: Reusable>(_: T.Type) {
+    if let nib = T.nib {
+      self.registerNib(nib, forCellReuseIdentifier: T.reuseIdentifier)
+    } else {
+      self.registerClass(T.self, forCellReuseIdentifier: T.reuseIdentifier)
+    }
+  }
+
+  func dequeueReusableCell<T: UITableViewCell where T: Reusable>(indexPath indexPath: NSIndexPath) -> T {
+    return self.dequeueReusableCellWithIdentifier(T.reuseIdentifier, forIndexPath: indexPath) as! T
+  }
+
+  func registerReusableHeaderFooterView<T: UITableViewHeaderFooterView where T: Reusable>(_: T.Type) {
+    if let nib = T.nib {
+      self.registerNib(nib, forHeaderFooterViewReuseIdentifier: T.reuseIdentifier)
+    } else {
+      self.registerClass(T.self, forHeaderFooterViewReuseIdentifier: T.reuseIdentifier)
+    }
+  }
+
+  func dequeueReusableHeaderFooterView<T: UITableViewHeaderFooterView where T: Reusable>() -> T? {
+    return self.dequeueReusableHeaderFooterViewWithIdentifier(T.reuseIdentifier) as! T?
+  }
+}
+
+extension UICollectionView {
+  func registerReusableCell<T: UICollectionViewCell where T: Reusable>(_: T.Type) {
+    if let nib = T.nib {
+      self.registerNib(nib, forCellWithReuseIdentifier: T.reuseIdentifier)
+    } else {
+      self.registerClass(T.self, forCellWithReuseIdentifier: T.reuseIdentifier)
+    }
+  }
+
+  func dequeueReusableCell<T: UICollectionViewCell where T: Reusable>(indexPath indexPath: NSIndexPath) -> T {
+    return self.dequeueReusableCellWithReuseIdentifier(T.reuseIdentifier, forIndexPath: indexPath) as! T
+  }
+
+  func registerReusableSupplementaryView<T: Reusable>(elementKind: String, _: T.Type) {
+    if let nib = T.nib {
+      self.registerNib(nib, forSupplementaryViewOfKind: elementKind, withReuseIdentifier: T.reuseIdentifier)
+    } else {
+      self.registerClass(T.self, forSupplementaryViewOfKind: elementKind, withReuseIdentifier: T.reuseIdentifier)
+    }
+  }
+
+  func dequeueReusableSupplementaryView<T: UICollectionViewCell where T: Reusable>(elementKind: String, indexPath: NSIndexPath) -> T {
+    return self.dequeueReusableSupplementaryViewOfKind(elementKind, withReuseIdentifier: T.reuseIdentifier, forIndexPath: indexPath) as! T
+  }
+}