Add storyboard support #39

Example/IGListKitExamples/SectionControllers/DemoSectionController.swift

@@ -24,7 +24,7 @@ class DemoItem: NSObject {
     init(
         name: String,
         controllerClass: UIViewController.Type,
-        controllerIdentifier: String?=nil
+        controllerIdentifier: String? = nil
         ) {
         self.name = name
         self.controllerClass = controllerClass

Example/IGListKitExamples/SectionControllers/HorizontalSectionController.swift

@@ -58,8 +58,6 @@ class HorizontalSectionController: IGListSectionController, IGListSectionType, I
         return EmbeddedSectionController()
     }
 
-    func emptyView(for listAdapter: IGListAdapter) -> UIView? {
-        return nil
-    }
+    func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
 
 }

Example/IGListKitExamples/ViewControllers/DemosViewController.swift

@@ -57,8 +57,6 @@ class DemosViewController: UIViewController, IGListAdapterDataSource {
         return DemoSectionController()
     }
 
-    func emptyView(for listAdapter: IGListAdapter) -> UIView? {
-        return nil
-    }
+    func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
 
 }

Example/IGListKitExamples/ViewControllers/NestedAdapterViewController.swift

@@ -59,8 +59,6 @@ class NestedAdapterViewController: UIViewController, IGListAdapterDataSource {
         }
     }
 
-    func emptyView(for listAdapter: IGListAdapter) -> UIView? {
-        return nil
-    }
+    func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
 
 }

Example/IGListKitExamples/ViewControllers/SearchViewController.swift

@@ -62,9 +62,7 @@ class SearchViewController: UIViewController, IGListAdapterDataSource, SearchSec
         }
     }
 
-    func emptyView(for listAdapter: IGListAdapter) -> UIView? {
-        return nil
-    }
+    func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
 
     //MARK: SearchSectionControllerDelegate
 

Example/IGListKitExamples/ViewControllers/SingleSectionStoryboardViewController.swift

@@ -55,9 +55,7 @@ final class SingleSectionStoryboardViewController: UIViewController, IGListAdapt
         return sectionController
     }
 
-    func emptyView(for listAdapter: IGListAdapter) -> UIView? {
-        return nil
-    }
+    func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
 
     // MARK: - IGListSingleSectionControllerDelegate
 

Example/IGListKitExamples/ViewControllers/SingleSectionViewController.swift

@@ -65,9 +65,7 @@ final class SingleSectionViewController: UIViewController, IGListAdapterDataSour
         return sectionController
     }
 
-    func emptyView(for listAdapter: IGListAdapter) -> UIView? {
-        return nil
-    }
+    func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
 
     // MARK: - IGListSingleSectionControllerDelegate
 

Example/IGListKitExamples/ViewControllers/WorkingRangeViewController.swift

@@ -54,8 +54,6 @@ class WorkingRangeViewController: UIViewController, IGListAdapterDataSource {
         return WorkingRangeSectionController()
     }
 
-    func emptyView(for listAdapter: IGListAdapter) -> UIView? {
-        return nil
-    }
+    func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
 
 }

Source/IGListAdapter.m

@@ -732,7 +732,7 @@ - (__kindof UICollectionViewCell *)dequeueReusableCellFromStoryboardWithIdentifi
                                                                            atIndex:(NSInteger)index {
     IGAssertMainThread();
     IGParameterAssert(sectionController != nil);
-    IGParameterAssert(identifier != nil);
+    IGParameterAssert(identifier.length > 0);
     UICollectionView *collectionView = self.collectionView;
     IGAssert(collectionView != nil, @"Reloading adapter without a collection view.");
     NSIndexPath *indexPath = [self indexPathForSectionController:sectionController index:index];