Empty view WIP

SSManagedTableViewController.h

@@ -17,7 +17,6 @@
 @property (nonatomic) BOOL clearsSelectionOnViewWillAppear;
 
 - (id)initWithStyle:(UITableViewStyle)style;
-
 - (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath;
 
 @end

SSManagedTableViewController.m

@@ -193,6 +193,7 @@ - (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)
 
 
 - (void)controllerDidChangeContent:(NSFetchedResultsController *)controller {
+	[super controllerDidChangeContent:controller];
 	if (self.ignoreChange) {
 		return;
 	}

SSManagedViewController.h

@@ -17,6 +17,7 @@
 @property (nonatomic, strong) SSManagedObject *managedObject;
 @property (nonatomic, strong) NSFetchedResultsController *fetchedResultsController;
 @property (nonatomic, assign) BOOL ignoreChange;
+@property (nonatomic, strong) UIView *emptyView;
 
 + (Class)fetchedResultsControllerClass;
 - (NSFetchRequest *)fetchRequest;

SSManagedViewController.m

@@ -9,11 +9,16 @@
 #import "SSManagedViewController.h"
 #import "SSManagedObject.h"
 
+@interface SSManagedViewController ()
+- (void)_updateEmptyView:(BOOL)animated;
+@end
+
 @implementation SSManagedViewController
 
 @synthesize managedObject = _managedObject;
 @synthesize fetchedResultsController = _fetchedResultsController;
 @synthesize ignoreChange = _ignoreChange;
+@synthesize emptyView = _emptyView;
 
 #pragma mark - Accessors
 
@@ -43,6 +48,14 @@ - (void)dealloc {
 }
 
 
+#pragma mark - UIViewController
+
+- (void)viewWillAppear:(BOOL)animated {
+	[super viewWillAppear:animated];
+	[self _updateEmptyView:NO];
+}
+
+
 #pragma mark - Configuration
 
 + (Class)fetchedResultsControllerClass {
@@ -105,4 +118,45 @@ - (id)objectForViewIndexPath:(NSIndexPath *)indexPath {
 	return [self.fetchedResultsController objectAtIndexPath:[self fetchedIndexPathForViewIndexPath:indexPath]];
 }
 
+
+#pragma mark - Private
+
+- (void)_updateEmptyView:(BOOL)animated {
+	if (!self.emptyView) {
+		return;
+	}
+
+	NSInteger objectCount = self.fetchedResultsController.fetchedObjects.count;
+	if (self.emptyView.superview && objectCount > 0) {
+		if (animated) {
+			[UIView animateWithDuration:0.3 delay:0.0f options:UIViewAnimationOptionAllowUserInteraction animations:^{
+				self.emptyView.alpha = 0.0f;
+			} completion:^(BOOL finished) {
+				[self.emptyView removeFromSuperview];
+			}];
+		} else {
+			[self.emptyView removeFromSuperview];
+		}
+	} else if (!self.emptyView.superview && objectCount == 0) {
+		if (animated) {
+			self.emptyView.alpha = 0.0f;
+			[self.view addSubview:self.emptyView];
+			[UIView animateWithDuration:0.3 delay:0.0f options:UIViewAnimationOptionAllowUserInteraction animations:^{
+				self.emptyView.alpha = 1.0f;
+			} completion:nil];
+		} else {
+			self.emptyView.frame = self.view.bounds;
+			self.emptyView.alpha = 1.0f;
+			[self.view addSubview:self.emptyView];
+		}
+	}
+}
+
+
+#pragma mark - NSFetchedResultsControllerDelegate
+
+- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller {
+	[self _updateEmptyView:YES];
+}
+
 @end