Adding recursive find on firstResponder UIView extension.

CHANGELOG.md

@@ -6,13 +6,15 @@ The changelog for **SwifterSwift**. Also see the [releases](https://github.com/S
 > ### Added
 - **UITableViewExtentions**:
   - Added `isValidIndexPath(_ indexPath:)` method to check whether given IndexPath is valid within UITableView. [#441](https://github.com/SwifterSwift/SwifterSwift/pull/441) by [setoelkahfi](https://github.com/setoelkahfi).
-> ### Changed
+### Changed
 - **UITableViewExtentions**:
   - `dequeueReusableCell(withClass:for)`, `dequeueReusableCell(withClass)` now return `UITableViewCell` object, `fatalError(...)` if not found. [#439](https://github.com/SwifterSwift/SwifterSwift/pull/439) by [jdisho](https://github.com/jdisho)
   - `dequeueReusableHeaderFooterView(withClass)`now returns `UITableViewHeaderFooterView` object, `fatalError(...)` if not found. [#439](https://github.com/SwifterSwift/SwifterSwift/pull/439) by [jdisho](https://github.com/jdisho)
 - **UICollectionView**:
   - `dequeueReusableCell(withClass:for)` now return `UICollectionViewCell` object, `fatalError(...)` if not found. [#439](https://github.com/SwifterSwift/SwifterSwift/pull/439) by [jdisho](https://github.com/jdisho)
   - `dequeueReusableSupplementaryView(ofKind:withClass:for)`now returns `UICollectionReusableView` object, `fatalError(...)` if not found. [#439](https://github.com/SwifterSwift/SwifterSwift/pull/439) by [jdisho](https://github.com/jdisho)
+- **UIView**:
+  - `firstResponder` UIView extension now suport recursive find in the view hierarchy. [#447](https://github.com/SwifterSwift/SwifterSwift/pull/447) by [LucianoPAlmeida](https://github.com/LucianoPAlmeida).
 > ### Deprecated
 > ### Removed
 > ### Fixed

Sources/Extensions/UIKit/UIViewExtensions.swift

@@ -86,11 +86,20 @@ public extension UIView {
 
 	/// SwifterSwift: First responder.
 	public var firstResponder: UIView? {
-		guard !isFirstResponder else { return self }
-		for subView in subviews where subView.isFirstResponder {
-			return subView
-		}
-		return nil
+        guard
+            !isFirstResponder else { return self }
+        guard
+            !subviews.isEmpty else { return nil }
+
+        if let responder = subviews.first(where: { $0.isFirstResponder }) {
+            return responder
+        }
+        for subview in subviews {
+            if let responder = subview.firstResponder {
+                return responder
+            }
+        }
+        return nil
 	}
 
 	// SwifterSwift: Height of view.

Tests/UIKitTests/UIViewExtensionsTests.swift

@@ -42,8 +42,28 @@ final class UIViewExtensionsTests: XCTestCase {
 	}
 
     func testFirstResponder() {
-        let view = UIView()
-        XCTAssertNil(view.firstResponder)
+        // When there's no firstResponder
+        XCTAssertNil(UIView().firstResponder)
+
+        let window = UIWindow()
+
+        // When self is firstResponder
+        let txtView = UITextField(frame: CGRect.zero)
+        window.addSubview(txtView)
+        txtView.becomeFirstResponder()
+        XCTAssertTrue(txtView.firstResponder === txtView)
+
+        // When a subview is firstResponder
+        let superView = UIView()
+        window.addSubview(superView)
+        let subView = UITextField(frame: CGRect.zero)
+        superView.addSubview(subView)
+        subView.becomeFirstResponder()
+        XCTAssertTrue(superView.firstResponder === subView)
+
+        // When you have to find recursively
+        XCTAssertTrue(window.firstResponder === subView)
+
     }
 
 	func testHeight() {