Add update layout sample

Examples/Samples/Sources/Base.lproj/Main.storyboard

@@ -190,7 +190,7 @@
                                 </connections>
                             </button>
                             <stackView opaque="NO" contentMode="scaleToFill" axis="vertical" alignment="top" spacing="44" translatesAutoresizingMaskIntoConstraints="NO" id="9p4-06-y2T">
-                                <rect key="frame" x="145" y="108" width="85" height="178"/>
+                                <rect key="frame" x="139.5" y="108" width="96" height="252"/>
                                 <subviews>
                                     <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="i9x-x5-n1q">
                                         <rect key="frame" x="0.0" y="0.0" width="80" height="30"/>
@@ -213,6 +213,13 @@
                                             <action selector="moveToTipWithSender:" destination="bYI-y3-Rzb" eventType="touchUpInside" id="BmL-91-9ai"/>
                                         </connections>
                                     </button>
+                                    <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="szf-HE-QTk">
+                                        <rect key="frame" x="0.0" y="222" width="96" height="30"/>
+                                        <state key="normal" title="Update layout"/>
+                                        <connections>
+                                            <action selector="updateLayout:" destination="bYI-y3-Rzb" eventType="touchUpInside" id="Woz-a7-YMJ"/>
+                                        </connections>
+                                    </button>
                                 </subviews>
                             </stackView>
                         </subviews>

Examples/Samples/Sources/ViewController.swift

@@ -374,14 +374,19 @@ class DetailViewController: UIViewController {
     }
 }
 
-class ModalViewController: UIViewController {
+class ModalViewController: UIViewController, FloatingPanelControllerDelegate {
     var fpc: FloatingPanelController!
     var consoleVC: DebugTextViewController!
+
     @IBOutlet weak var safeAreaView: UIView!
+
+    var isNewlayout: Bool = false
+
     override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
         // Initialize FloatingPanelController
         fpc = FloatingPanelController()
+        fpc.delegate = self
 
         // Initialize FloatingPanelController and add the view
         fpc.surfaceView.cornerRadius = 6.0
@@ -417,6 +422,31 @@ class ModalViewController: UIViewController {
     @IBAction func moveToTip(sender: UIButton) {
         fpc.move(to: .tip, animated: true)
     }
+
+    @IBAction func updateLayout(_ sender: Any) {
+        isNewlayout = !isNewlayout
+        UIView.animate(withDuration: 0.5) {
+            self.fpc.updateLayout()
+        }
+    }
+
+    func floatingPanel(_ vc: FloatingPanelController, layoutFor newCollection: UITraitCollection) -> FloatingPanelLayout? {
+        return (isNewlayout) ? ModalSecondLayout() : nil
+    }
+}
+
+class ModalSecondLayout: FloatingPanelLayout {
+    var initialPosition: FloatingPanelPosition {
+        return .half
+    }
+
+    func insetFor(position: FloatingPanelPosition) -> CGFloat? {
+        switch position {
+        case .full: return 18.0
+        case .half: return 262.0
+        case .tip: return 44.0
+        }
+    }
 }
 
 class TabBarViewController: UITabBarController {}