ChangingBackground Changes

ChangingBackground.xcodeproj/project.pbxproj

@@ -24,6 +24,8 @@
 		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 */; };
+		DF1528581941206000770B11 /* TransitioningDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = DF1528571941206000770B11 /* TransitioningDelegate.m */; };
+		DF15285B194120A100770B11 /* AnimatedTransitioning.m in Sources */ = {isa = PBXBuildFile; fileRef = DF15285A194120A100770B11 /* AnimatedTransitioning.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -50,6 +52,10 @@
 		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>"; };
+		DF1528561941206000770B11 /* TransitioningDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TransitioningDelegate.h; sourceTree = "<group>"; };
+		DF1528571941206000770B11 /* TransitioningDelegate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TransitioningDelegate.m; sourceTree = "<group>"; };
+		DF152859194120A100770B11 /* AnimatedTransitioning.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AnimatedTransitioning.h; sourceTree = "<group>"; };
+		DF15285A194120A100770B11 /* AnimatedTransitioning.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AnimatedTransitioning.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -98,6 +104,7 @@
 			children = (
 				001809EF171C6768002D3E93 /* BackgroundImages */,
 				001809D5171C63FC002D3E93 /* AppDelegate */,
+				DF1528551941201C00770B11 /* Transitioning */,
 				001809DC171C6453002D3E93 /* ViewControllers */,
 				001809BF171C637E002D3E93 /* Supporting Files */,
 			);
@@ -167,6 +174,17 @@
 			name = BackgroundImages;
 			sourceTree = "<group>";
 		};
+		DF1528551941201C00770B11 /* Transitioning */ = {
+			isa = PBXGroup;
+			children = (
+				DF1528561941206000770B11 /* TransitioningDelegate.h */,
+				DF1528571941206000770B11 /* TransitioningDelegate.m */,
+				DF152859194120A100770B11 /* AnimatedTransitioning.h */,
+				DF15285A194120A100770B11 /* AnimatedTransitioning.m */,
+			);
+			name = Transitioning;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -238,9 +256,11 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				DF1528581941206000770B11 /* TransitioningDelegate.m in Sources */,
 				001809C5171C637E002D3E93 /* main.m in Sources */,
 				001809C9171C637E002D3E93 /* AppDelegate.m in Sources */,
 				001809D9171C6448002D3E93 /* FirstViewController.m in Sources */,
+				DF15285B194120A100770B11 /* AnimatedTransitioning.m in Sources */,
 				001809E0171C64E4002D3E93 /* SecondViewController.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -356,6 +376,7 @@
 				001809D4171C637E002D3E93 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};

ChangingBackground/AnimatedTransitioning.h

@@ -0,0 +1,15 @@
+//
+//  AnimatedTransitioning.h
+//  ChangingBackground
+//
+//  Created by Christopher Gu on 6/5/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface AnimatedTransitioning : NSObject <UIViewControllerAnimatedTransitioning>
+
+@property (nonatomic) BOOL reverse;
+
+@end

ChangingBackground/AnimatedTransitioning.m

@@ -0,0 +1,64 @@
+//
+//  AnimatedTransitioning.m
+//  ChangingBackground
+//
+//  Created by Christopher Gu on 6/5/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import "AnimatedTransitioning.h"
+#import "AppDelegate.h"
+
+static NSTimeInterval const AnimatedTransitionDuration = 0.5f;
+
+@implementation AnimatedTransitioning
+
+
+- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
+{
+    AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
+
+    UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
+    UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
+    UIView *container = [transitionContext containerView];
+
+    [container addSubview:toViewController.view];
+
+    if (self.reverse) {
+        [UIView animateWithDuration:AnimatedTransitionDuration animations:^{
+            toViewController.view.frame = CGRectMake(-320, 0, toViewController.view.frame.size.width, toViewController.view.frame.size.height);
+            toViewController.view.frame = CGRectMake(0, 0, toViewController.view.frame.size.width, toViewController.view.frame.size.height);
+            fromViewController.view.frame = CGRectMake(320, 0, fromViewController.view.frame.size.width, fromViewController.view.frame.size.height);
+        } completion:^(BOOL finished) {
+            [transitionContext completeTransition:finished];
+
+            [UIView transitionWithView:appDelegate.window duration:0.5f options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
+                appDelegate.window.backgroundColor = [UIColor colorWithPatternImage:appDelegate.blueBackground];
+            } completion:^(BOOL finished) {
+
+            }];
+        }];
+    }
+    else {
+        [UIView animateWithDuration:AnimatedTransitionDuration animations:^{
+            toViewController.view.frame = CGRectMake(320, 0, toViewController.view.frame.size.width, toViewController.view.frame.size.height);
+            toViewController.view.frame = CGRectMake(0, 0, toViewController.view.frame.size.width, toViewController.view.frame.size.height);
+            fromViewController.view.frame = CGRectMake(-320, 0, fromViewController.view.frame.size.width, fromViewController.view.frame.size.height);
+        } completion:^(BOOL finished) {
+            [transitionContext completeTransition:finished];
+
+            [UIView transitionWithView:appDelegate.window duration:0.5f options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
+                appDelegate.window.backgroundColor = [UIColor colorWithPatternImage:appDelegate.greenBackground];
+            } completion:^(BOOL finished) {
+
+            }];
+        }];
+    }
+}
+
+- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext
+{
+    return AnimatedTransitionDuration;
+}
+
+@end

ChangingBackground/AppDelegate.h

@@ -9,5 +9,8 @@
 #import <UIKit/UIKit.h>
 
 @interface AppDelegate : UIResponder <UIApplicationDelegate>
+@property (strong, nonatomic) UIWindow *window;
+@property (strong, nonatomic) UIImage *blueBackground;
+@property (strong, nonatomic) UIImage *greenBackground;
 
 @end

ChangingBackground/AppDelegate.m

@@ -7,27 +7,47 @@
 //
 
 #import "AppDelegate.h"
+#import "TransitioningDelegate.h"
 #import "FirstViewController.h"
 
 @interface AppDelegate () {
-    UIWindow *window;
 }
+@property (nonatomic, strong) TransitioningDelegate *transitioningDelegate;
+
 @end
 
 
 @implementation AppDelegate
 
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-    window = [UIWindow.alloc initWithFrame:UIScreen.mainScreen.bounds];
-    [window makeKeyAndVisible];
+    self.window = [UIWindow.alloc initWithFrame:UIScreen.mainScreen.bounds];
+    [self.window makeKeyAndVisible];
 
     FirstViewController *firstViewController = FirstViewController.new;
-    UINavigationController *navigationController = [UINavigationController.alloc initWithRootViewController:firstViewController];
-    [navigationController setNavigationBarHidden:YES];
-
-    window.rootViewController = navigationController;
+
+    self.transitioningDelegate = [TransitioningDelegate new];
+    firstViewController.transitioningDelegate = self.transitioningDelegate;
+    self.window.rootViewController = firstViewController;
+
+    self.blueBackground = [self imageWithImage:[UIImage imageNamed:@"blue"] scaledToSize:CGSizeMake(320, 568)];
+    self.greenBackground = [self imageWithImage:[UIImage imageNamed:@"green"] scaledToSize:CGSizeMake(320, 568)];
+
+    self.window.backgroundColor = [UIColor colorWithPatternImage:self.blueBackground];
 
     return YES;
 }
 
+// the image sizes are too short for 4-inch
+- (UIImage*)imageWithImage:(UIImage*)image
+              scaledToSize:(CGSize)newSize
+{
+    UIGraphicsBeginImageContext( newSize );
+    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
+    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
+    UIGraphicsEndImageContext();
+
+    return newImage;
+}
+
 @end
+

ChangingBackground/FirstViewController.m

@@ -10,14 +10,23 @@
 #import "SecondViewController.h"
 
 @interface FirstViewController ()
-
+{
+    IBOutlet UIButton *goForwardButton;
+}
 @end
 
 @implementation FirstViewController
 
+-(void)viewDidLoad
+{
+    self.view.backgroundColor = [UIColor clearColor];
+    goForwardButton.layer.cornerRadius = 5.0;
+}
+
 - (IBAction)goForwardButtonPressed {
     SecondViewController *secondViewController = SecondViewController.new;
-    [self.navigationController pushViewController:secondViewController animated:YES];
+    secondViewController.transitioningDelegate = self.transitioningDelegate;
+    [self presentViewController:secondViewController animated:YES completion:nil];
 }
 
 @end