jeffreycamealy · artmayes167 · Jun 20, 2014
diff --git a/ChangingBackground.xcodeproj/project.pbxproj b/ChangingBackground.xcodeproj/project.pbxproj
@@ -17,13 +17,14 @@
 		001809CD171C637E002D3E93 /* Default@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 001809CC171C637E002D3E93 /* Default@2x.png */; };
 		001809CF171C637E002D3E93 /* Default-568h@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 001809CE171C637E002D3E93 /* Default-568h@2x.png */; };
 		001809D9171C6448002D3E93 /* FirstViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 001809D7171C6448002D3E93 /* FirstViewController.m */; };
-		001809DA171C6448002D3E93 /* FirstViewController.xib in Resources */ = {isa = PBXBuildFile; fileRef = 001809D8171C6448002D3E93 /* FirstViewController.xib */; };
 		001809E0171C64E4002D3E93 /* SecondViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 001809DE171C64E3002D3E93 /* SecondViewController.m */; };
-		001809E1171C64E4002D3E93 /* SecondViewController.xib in Resources */ = {isa = PBXBuildFile; fileRef = 001809DF171C64E3002D3E93 /* SecondViewController.xib */; };
 		001809EB171C6764002D3E93 /* blue.png in Resources */ = {isa = PBXBuildFile; fileRef = 001809E7171C6764002D3E93 /* blue.png */; };
 		001809EC171C6764002D3E93 /* blue@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 001809E8171C6764002D3E93 /* blue@2x.png */; };
 		001809ED171C6764002D3E93 /* green.png in Resources */ = {isa = PBXBuildFile; fileRef = 001809E9171C6764002D3E93 /* green.png */; };
 		001809EE171C6764002D3E93 /* green@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 001809EA171C6764002D3E93 /* green@2x.png */; };
+		5D7EB6A31954A76900AD7E76 /* MainStoryboard.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 5D7EB6A21954A76900AD7E76 /* MainStoryboard.storyboard */; };
+		5D7EB6A91954ADF300AD7E76 /* AEMCollectionVC.m in Sources */ = {isa = PBXBuildFile; fileRef = 5D7EB6A81954ADF300AD7E76 /* AEMCollectionVC.m */; };
+		5D7EB6AC1954AE3800AD7E76 /* AEMViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 5D7EB6AB1954AE3800AD7E76 /* AEMViewController.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -42,14 +43,17 @@
 		001809CE171C637E002D3E93 /* Default-568h@2x.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "Default-568h@2x.png"; sourceTree = "<group>"; };
 		001809D6171C6448002D3E93 /* FirstViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FirstViewController.h; sourceTree = "<group>"; };
 		001809D7171C6448002D3E93 /* FirstViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = FirstViewController.m; sourceTree = "<group>"; };
-		001809D8171C6448002D3E93 /* FirstViewController.xib */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.xib; path = FirstViewController.xib; sourceTree = "<group>"; };
 		001809DD171C64E3002D3E93 /* SecondViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SecondViewController.h; sourceTree = "<group>"; };
 		001809DE171C64E3002D3E93 /* SecondViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SecondViewController.m; sourceTree = "<group>"; };
-		001809DF171C64E3002D3E93 /* SecondViewController.xib */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.xib; path = SecondViewController.xib; sourceTree = "<group>"; };
 		001809E7171C6764002D3E93 /* blue.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = blue.png; sourceTree = "<group>"; };
 		001809E8171C6764002D3E93 /* blue@2x.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "blue@2x.png"; sourceTree = "<group>"; };
 		001809E9171C6764002D3E93 /* green.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = green.png; sourceTree = "<group>"; };
 		001809EA171C6764002D3E93 /* green@2x.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "green@2x.png"; sourceTree = "<group>"; };
+		5D7EB6A21954A76900AD7E76 /* MainStoryboard.storyboard */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.storyboard; path = MainStoryboard.storyboard; sourceTree = "<group>"; };
+		5D7EB6A71954ADF300AD7E76 /* AEMCollectionVC.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AEMCollectionVC.h; sourceTree = "<group>"; };
+		5D7EB6A81954ADF300AD7E76 /* AEMCollectionVC.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AEMCollectionVC.m; sourceTree = "<group>"; };
+		5D7EB6AA1954AE3800AD7E76 /* AEMViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AEMViewController.h; sourceTree = "<group>"; };
+		5D7EB6AB1954AE3800AD7E76 /* AEMViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AEMViewController.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -69,6 +73,7 @@
 		001809AC171C637E002D3E93 = {
 			isa = PBXGroup;
 			children = (
+				5D7EB6A21954A76900AD7E76 /* MainStoryboard.storyboard */,
 				001809BE171C637E002D3E93 /* ChangingBackground */,
 				001809B7171C637E002D3E93 /* Frameworks */,
 				001809B6171C637E002D3E93 /* Products */,
@@ -132,7 +137,6 @@
 			children = (
 				001809D6171C6448002D3E93 /* FirstViewController.h */,
 				001809D7171C6448002D3E93 /* FirstViewController.m */,
-				001809D8171C6448002D3E93 /* FirstViewController.xib */,
 			);
 			name = FirstViewController;
 			sourceTree = "<group>";
@@ -142,6 +146,10 @@
 			children = (
 				001809DB171C644A002D3E93 /* FirstViewController */,
 				001809E2171C650E002D3E93 /* SecondViewController */,
+				5D7EB6A71954ADF300AD7E76 /* AEMCollectionVC.h */,
+				5D7EB6A81954ADF300AD7E76 /* AEMCollectionVC.m */,
+				5D7EB6AA1954AE3800AD7E76 /* AEMViewController.h */,
+				5D7EB6AB1954AE3800AD7E76 /* AEMViewController.m */,
 			);
 			name = ViewControllers;
 			sourceTree = "<group>";
@@ -151,7 +159,6 @@
 			children = (
 				001809DD171C64E3002D3E93 /* SecondViewController.h */,
 				001809DE171C64E3002D3E93 /* SecondViewController.m */,
-				001809DF171C64E3002D3E93 /* SecondViewController.xib */,
 			);
 			name = SecondViewController;
 			sourceTree = "<group>";
@@ -219,11 +226,10 @@
 			buildActionMask = 2147483647;
 			files = (
 				001809C3171C637E002D3E93 /* InfoPlist.strings in Resources */,
+				5D7EB6A31954A76900AD7E76 /* MainStoryboard.storyboard in Resources */,
 				001809CB171C637E002D3E93 /* Default.png in Resources */,
 				001809CD171C637E002D3E93 /* Default@2x.png in Resources */,
 				001809CF171C637E002D3E93 /* Default-568h@2x.png in Resources */,
-				001809DA171C6448002D3E93 /* FirstViewController.xib in Resources */,
-				001809E1171C64E4002D3E93 /* SecondViewController.xib in Resources */,
 				001809EB171C6764002D3E93 /* blue.png in Resources */,
 				001809EC171C6764002D3E93 /* blue@2x.png in Resources */,
 				001809ED171C6764002D3E93 /* green.png in Resources */,
@@ -238,9 +244,11 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				5D7EB6A91954ADF300AD7E76 /* AEMCollectionVC.m in Sources */,
 				001809C5171C637E002D3E93 /* main.m in Sources */,
 				001809C9171C637E002D3E93 /* AppDelegate.m in Sources */,
 				001809D9171C6448002D3E93 /* FirstViewController.m in Sources */,
+				5D7EB6AC1954AE3800AD7E76 /* AEMViewController.m in Sources */,
 				001809E0171C64E4002D3E93 /* SecondViewController.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -356,6 +364,7 @@
 				001809D4171C637E002D3E93 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};

diff --git a/ChangingBackground/AEMCollectionVC.h b/ChangingBackground/AEMCollectionVC.h
@@ -0,0 +1,22 @@
+//
+//  AEMCollectionVC.h
+//  ChangingBackground
+//
+//  Created by Arthur Mayes on 6/20/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@protocol AEMCollectionVCDelegate <NSObject>
+
+- (void)didGoToFirst;
+- (void)didGoToSecond;
+
+@end
+
+@interface AEMCollectionVC : UICollectionViewController
+
+@property (nonatomic, weak) id<AEMCollectionVCDelegate> delegate;
+
+@end
diff --git a/ChangingBackground/AEMCollectionVC.m b/ChangingBackground/AEMCollectionVC.m
@@ -0,0 +1,89 @@
+//
+//  AEMCollectionVC.m
+//  ChangingBackground
+//
+//  Created by Arthur Mayes on 6/20/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import "AEMCollectionVC.h"
+#import "FirstViewController.h"
+#import "SecondViewController.h"
+
+@interface AEMCollectionVC () <FirstViewControllerDelegate, SecondViewControllerDelegate>
+
+@property (nonatomic, weak) FirstViewController *firstViewController;
+@property (nonatomic, weak) SecondViewController *secondViewController;
+
+@end
+
+@implementation AEMCollectionVC
+
+#pragma mark - Lazy Instantiation
+
+- (FirstViewController *)firstViewController
+{
+    if (!_firstViewController) {
+        _firstViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"First"];
+        _firstViewController.delegate = self;
+        [_firstViewController willMoveToParentViewController:self];
+        [self addChildViewController:_firstViewController];
+    }
+    return _firstViewController;
+}
+
+- (SecondViewController *)secondViewController
+{
+    if (!_secondViewController) {
+        _secondViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"Second"];
+        _secondViewController.delegate = self;
+        [_secondViewController willMoveToParentViewController:self];
+        [self addChildViewController:_secondViewController];
+    }
+    return _secondViewController;
+}
+
+#pragma mark - Delegate Methods
+
+- (void)segueToFirst
+{
+    NSIndexPath *indexPath = [NSIndexPath indexPathForItem:0 inSection:0];
+    [self.collectionView scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];
+    if ([self.delegate respondsToSelector:@selector(didGoToFirst)]) {
+        [self.delegate didGoToFirst];
+    }
+}
+
+- (void)segueToSecond
+{
+    NSIndexPath *indexPath = [NSIndexPath indexPathForItem:1 inSection:0];
+    [self.collectionView scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];
+    if ([self.delegate respondsToSelector:@selector(didGoToSecond)]) {
+        [self.delegate didGoToSecond];
+    }
+}
+
+#pragma mark - UICollectionView Delegate/DataSource
+
+-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
+{
+    return 2;
+}
+
+-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
+{
+    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
+
+    NSArray *array = @[@"firstViewController", @"secondViewController"];
+
+    UIViewController *viewController = [self valueForKey:array[indexPath.item]];
+
+    [cell.contentView addSubview:viewController.view];
+
+    // There would be some additional work to do here if there were more than two VCs
+    // But I would have used a navigation controller if there were more than two VCs
+
+    return cell;
+}
+
+@end
diff --git a/ChangingBackground/AEMViewController.h b/ChangingBackground/AEMViewController.h
@@ -0,0 +1,13 @@
+//
+//  AEMViewController.h
+//  ChangingBackground
+//
+//  Created by Arthur Mayes on 6/20/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AEMViewController : UIViewController
+
+@end
diff --git a/ChangingBackground/AEMViewController.m b/ChangingBackground/AEMViewController.m
@@ -0,0 +1,74 @@
+//
+//  AEMViewController.m
+//  ChangingBackground
+//
+//  Created by Arthur Mayes on 6/20/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import "AEMViewController.h"
+#import "AEMCollectionVC.h"
+
+@interface AEMViewController () <AEMCollectionVCDelegate>
+@property (weak, nonatomic) IBOutlet UIImageView *protectiveView;
+@property (weak, nonatomic) IBOutlet UIImageView *blueImageView;
+@property (weak, nonatomic) IBOutlet UIImageView *greenImageView;
+
+@end
+
+@implementation AEMViewController
+
+#pragma mark - View Life Cycle
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+    [self.protectiveView setImage:[UIImage imageNamed:@"blue"]];
+    [self.blueImageView setImage:[UIImage imageNamed:@"blue"]];
+    [self.greenImageView setImage:[UIImage imageNamed:@"green"]];
+}
+
+#pragma mark - Background Animations
+
+- (void)didGoToFirst
+{
+    // Protective view is in case of quick-fire button tapping
+    [self.protectiveView setImage:[UIImage imageNamed:@"green"]];
+    [self.blueImageView setAlpha:0.0];
+    [self.view sendSubviewToBack:self.greenImageView];
+    [self.view sendSubviewToBack:self.protectiveView];
+
+    // Not using weakSelf here, because this is the rootVC
+    [UIView animateWithDuration:0.7 delay:0.2 options:UIViewAnimationOptionCurveEaseIn animations:^{
+        [self.blueImageView setAlpha:1.0f];
+    } completion:nil];
+
+}
+
+- (void)didGoToSecond
+{
+    // Protective view is in case of quick-fire button tapping
+    [self.protectiveView setImage:[UIImage imageNamed:@"blue"]];
+    [self.greenImageView setAlpha:0.0];
+    [self.view sendSubviewToBack:self.blueImageView];
+    [self.view sendSubviewToBack:self.protectiveView];
+
+    // Not using weakSelf here, because this is the rootVC
+    [UIView animateWithDuration:0.7 delay:0.2 options:UIViewAnimationOptionCurveEaseIn animations:^{
+        [self.greenImageView setAlpha:1.0f];
+    } completion:nil];
+
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
+{
+    if ([segue.identifier isEqualToString:@"toCollection"]) {
+        AEMCollectionVC *collectionVC = (AEMCollectionVC *)[segue destinationViewController];
+        collectionVC.delegate = self;
+    }
+}
+
+@end
diff --git a/ChangingBackground/AppDelegate.h b/ChangingBackground/AppDelegate.h
@@ -10,4 +10,6 @@
 
 @interface AppDelegate : UIResponder <UIApplicationDelegate>
 
+@property (strong, nonatomic) UIWindow *window;
+
 @end
diff --git a/ChangingBackground/AppDelegate.m b/ChangingBackground/AppDelegate.m
@@ -9,23 +9,14 @@
 #import "AppDelegate.h"
 #import "FirstViewController.h"
 
-@interface AppDelegate () {
-    UIWindow *window;
-}
+@interface AppDelegate () 
 @end
 
 
 @implementation AppDelegate
 
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-    window = [UIWindow.alloc initWithFrame:UIScreen.mainScreen.bounds];
-    [window makeKeyAndVisible];
 
-    FirstViewController *firstViewController = FirstViewController.new;
-    UINavigationController *navigationController = [UINavigationController.alloc initWithRootViewController:firstViewController];
-    [navigationController setNavigationBarHidden:YES];
-
-    window.rootViewController = navigationController;
 
     return YES;
 }

diff --git a/ChangingBackground/ChangingBackground-Info.plist b/ChangingBackground/ChangingBackground-Info.plist
@@ -24,15 +24,15 @@
 	<string>1.0</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>UIMainStoryboardFile</key>
+	<string>MainStoryboard</string>
 	<key>UIRequiredDeviceCapabilities</key>
 	<array>
 		<string>armv7</string>
 	</array>
 	<key>UISupportedInterfaceOrientations</key>
 	<array>
 		<string>UIInterfaceOrientationPortrait</string>
-		<string>UIInterfaceOrientationLandscapeLeft</string>
-		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>
 </dict>
 </plist>
diff --git a/ChangingBackground/FirstViewController.h b/ChangingBackground/FirstViewController.h
@@ -8,8 +8,17 @@
 
 #import <UIKit/UIKit.h>
 
+@protocol FirstViewControllerDelegate <NSObject>
+
+@optional
+- (void)segueToSecond;
+
+@end
+
 @interface FirstViewController : UIViewController
 
+@property (nonatomic, weak) id<FirstViewControllerDelegate> delegate;
+
 - (IBAction)goForwardButtonPressed;
 
 @end
diff --git a/ChangingBackground/FirstViewController.m b/ChangingBackground/FirstViewController.m
@@ -15,9 +15,11 @@ @interface FirstViewController ()
 
 @implementation FirstViewController
 
-- (IBAction)goForwardButtonPressed {
-    SecondViewController *secondViewController = SecondViewController.new;
-    [self.navigationController pushViewController:secondViewController animated:YES];
+- (IBAction)goForwardButtonPressed
+{
+    if ([self.delegate respondsToSelector:@selector(segueToSecond)]) {
+        [self.delegate segueToSecond];
+    }
 }
 
 @end
Original file line number	Diff line number	Diff line change
Expand Up		@@ -10,4 +10,6 @@

		@interface AppDelegate : UIResponder <UIApplicationDelegate>

		@property (strong, nonatomic) UIWindow *window;

		@end