First commit

.gitignore

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+# OS X
+.DS_Store
+
+# Xcode
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+*.xccheckout
+profile
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+
+**/Pods

CHANGELOG.md

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+# ESConveyorBelt CHANGELOG
+
+## 0.1.0
+
+Initial release.

Classes/ESConveyorAdapter.h

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+//
+// Created by Eduardo Scoz on 6/8/13.
+// Copyright (c) 2013 ESCOZ. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@class ESConveyorController;
+
+
+@interface ESConveyorAdapter : NSObject <UICollectionViewDelegate, UICollectionViewDataSource>
+
+@property(nonatomic) NSInteger numberOfPages;
+
+@property(nonatomic, strong) NSArray *elements;
+
+- (id)initWithCollectionView:(UICollectionView *)collectionView numberOfPages:(NSInteger)pages elements:(NSArray *)elements;
+
+@end

Classes/ESConveyorAdapter.m

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+//
+// Created by Eduardo Scoz on 6/8/13.
+// Copyright (c) 2013 ESCOZ. All rights reserved.
+//
+
+#import "ESConveyorAdapter.h"
+#import "ESConveyorController.h"
+#import "ESConveyorView.h"
+#import "ESConveyorFlowLayout.h"
+#import "ESConveyorView.h"
+#import "ESConveyorElement.h"
+#import "ESConveyorPageCell.h"
+
+
+static NSString *const ESConveyorElementReuseIdentifier = @"ESConveyorElementReuseIdentifier";
+NSString *kESConveyorCell = @"ESConveyorCell";
+
+@interface ESConveyorAdapter ()
+@property(nonatomic, weak) UICollectionView *collectionView;
+@end
+
+@implementation ESConveyorAdapter
+{
+
+}
+- (id)initWithCollectionView:(UICollectionView *)collectionView numberOfPages:(NSInteger)pages elements:(NSArray *)elements
+{
+
+    self = [super init];
+    if (self)
+    {
+        self.collectionView = collectionView;
+        self.numberOfPages = pages;
+        self.elements = elements;
+
+        self.collectionView.delegate = self;
+        self.collectionView.dataSource = self;
+        self.collectionView.pagingEnabled = YES;
+
+        [self.collectionView registerClass:[ESConveyorPageCell class] forCellWithReuseIdentifier:kESConveyorCell];
+        [self.collectionView registerClass:[ESConveyorView class] forSupplementaryViewOfKind:NSStringFromClass(ESConveyorElement.class) withReuseIdentifier:ESConveyorElementReuseIdentifier];
+
+    }
+
+    return self;
+}
+
+- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
+{
+    return 1;
+}
+
+- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
+{
+    return self.numberOfPages;
+}
+
+- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
+{
+    ESConveyorView *view = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:ESConveyorElementReuseIdentifier forIndexPath:indexPath];
+    ESConveyorElement *obj = [self.elements objectAtIndex:(NSUInteger) indexPath.row];
+    [view setCarrousselObject:obj];
+    return view;
+}
+
+
+- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
+{
+    return [collectionView dequeueReusableCellWithReuseIdentifier:kESConveyorCell forIndexPath:indexPath];
+}
+
+@end

Classes/ESConveyorBelt.h

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+//
+// Created by Eduardo Scoz on 6/8/13.
+// Copyright (c) 2013 ESCOZ. All rights reserved.
+//
+
+#import "ESConveyorController.h"
+#import "ESConveyorPageCell.h"
+#import "ESConveyorElement.h"
+#import "ESConveyorPageControlElement.h"
+#import "ESConveyorController.h"
+
+
+typedef NS_ENUM(NSUInteger, EZEffect) {
+    ESConveyorEffectFade,
+    ESConveyorEffectEdgeTop,
+    ESConveyorEffectEdgeLeft,
+    ESConveyorEffectEdgeRight,
+    ESConveyorEffectEdgeBottom,
+    ESConveyorEffectParallax10,
+    ESConveyorEffectParallax20,
+    ESConveyorEffectParallax33,
+    ESConveyorEffectParallax40,
+    ESConveyorEffectParallax50,
+    ESConveyorEffectParallax150,
+    ESConveyorEffectParallax200
+};
+

Classes/ESConveyorController.h

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+//
+// Created by Eduardo Scoz on 6/8/13.
+// Copyright (c) 2013 ESCOZ. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@class ESConveyorAdapter;
+
+
+@interface ESConveyorController : UICollectionViewController
+@property(nonatomic, strong) ESConveyorAdapter *adapter;
+
+- (id)initWithPages:(NSInteger)numberOfPages elements:(NSArray *)elements;
+@end

Classes/ESConveyorController.m

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+//
+// Created by Eduardo Scoz on 6/8/13.
+// Copyright (c) 2013 ESCOZ. All rights reserved.
+//
+
+#import "ESConveyorController.h"
+#import "ESConveyorFlowLayout.h"
+#import "ESConveyorAdapter.h"
+#import "ESConveyorElement.h"
+
+
+@implementation ESConveyorController
+{
+
+}
+- (instancetype)initWithPages:(NSInteger)numberOfPages elements:(NSArray *)elements
+{
+    ESConveyorFlowLayout *layout = [[ESConveyorFlowLayout alloc] init];
+
+    self = [super initWithCollectionViewLayout:layout];
+    if (self) {
+
+        self.adapter = [[ESConveyorAdapter alloc] initWithCollectionView:self.collectionView numberOfPages:numberOfPages elements:elements];
+        layout.adapter = self.adapter;
+
+        self.collectionView.showsHorizontalScrollIndicator = NO;
+        self.collectionView.showsVerticalScrollIndicator = NO;
+        self.collectionView.backgroundColor = [UIColor whiteColor];
+    }
+
+    return self;
+}
+
+
+@end

Classes/ESConveyorEffects.h

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+//
+// Created by Eduardo Scoz on 6/8/13.
+// Copyright (c) 2013 ESCOZ. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@class ESConveyorElement;
+
+
+@interface ESConveyorEffects : NSObject
+
+- (UICollectionViewLayoutAttributes *)getAttributesForPage:(NSUInteger)page atOffset:(CGPoint)offset pageWidth:(CGSize)pageSize index:(NSInteger)index progress:(CGFloat)progress element:(ESConveyorElement *)element;
+
+@end

Classes/ESConveyorEffects.m

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+//
+// Created by Eduardo Scoz on 6/8/13.
+// Copyright (c) 2013 ESCOZ. All rights reserved.
+//
+
+#import "ESConveyorEffects.h"
+#import "ESConveyorBelt.h"
+#import "ESConveyorElement.h"
+
+
+@implementation ESConveyorEffects
+{
+
+}
+
+- (UICollectionViewLayoutAttributes *)getAttributesForPage:(NSUInteger)page atOffset:(CGPoint)offset pageWidth:(CGSize)pageSize index:(NSInteger)index progress:(CGFloat)progress element:(ESConveyorElement *)element
+{
+    UICollectionViewLayoutAttributes *attr = [UICollectionViewLayoutAttributes layoutAttributesForSupplementaryViewOfKind:@"ESConveyorElement" withIndexPath:[NSIndexPath indexPathForItem:index inSection:0]];
+    attr.center = CGPointMake(offset.x + element.center.x, offset.y + element.center.y);
+    attr.size = element.size;
+    attr.alpha = 1;
+
+    NSArray *effects;
+    BOOL exitingPage = offset.x > page * pageSize.width;
+    BOOL exitingPreviousPage = offset.x > page-1 * pageSize.width;
+
+    BOOL exiting = NO;
+
+    if (page==element.inPage && !exitingPage)
+        effects = element.inEffects;
+
+    else if (page-1==element.outPage && exitingPreviousPage)
+    {
+        effects = element.outEffects;
+        progress = 1 - progress;
+        exiting = YES;
+        page = page -1;
+    }
+    else
+        effects = element.paginationEffects;
+
+    if (effects==nil)
+        return attr;
+
+    if ([effects containsObject:@(ESConveyorEffectParallax10)])
+        [self doParallax:page pageSize:pageSize progress:progress attr:attr ratio:10 direction:exiting element:element];
+
+    if ([effects containsObject:@(ESConveyorEffectParallax20)])
+        [self doParallax:page pageSize:pageSize progress:progress attr:attr ratio:5 direction:exiting element:element];
+
+    if ([effects containsObject:@(ESConveyorEffectParallax33)])
+        [self doParallax:page pageSize:pageSize progress:progress attr:attr ratio:3.3 direction:exiting element:element];
+
+    if ([effects containsObject:@(ESConveyorEffectParallax40)])
+        [self doParallax:page pageSize:pageSize progress:progress attr:attr ratio:2.5 direction:exiting element:element];
+
+    if ([effects containsObject:@(ESConveyorEffectParallax50)])
+        [self doParallax:page pageSize:pageSize progress:progress attr:attr ratio:2 direction:exiting element:element];
+
+    if ([effects containsObject:@(ESConveyorEffectParallax150)])
+        [self doParallax:page pageSize:pageSize progress:progress attr:attr ratio:0.75 direction:exiting element:element];
+
+    if ([effects containsObject:@(ESConveyorEffectParallax200)])
+        [self doParallax:page pageSize:pageSize progress:progress attr:attr ratio:0.5 direction:exiting element:element];
+
+    if ([effects containsObject:@(ESConveyorEffectFade)])
+    {
+        attr.alpha = progress;
+    }
+
+    if ([effects containsObject:@(ESConveyorEffectEdgeTop)])
+    {
+        CGFloat start = - element.size.height / 2;
+        CGFloat current = offset.y + ((element.center.y - start) * progress) + start;
+        CGPoint newCenter = attr.center;
+        newCenter.y = current;
+        attr.center = newCenter;
+    }
+
+    if ([effects containsObject:@(ESConveyorEffectEdgeLeft)])
+    {
+        CGFloat start = - (element.size.width / 2);
+        CGFloat current = ((element.center.x - start) * progress) + start;
+        CGPoint newCenter = attr.center;
+        newCenter.x = offset.x +current;
+        attr.center = newCenter;
+    }
+
+    if ([effects containsObject:@(ESConveyorEffectEdgeRight)])
+    {
+        CGFloat start = pageSize.width + (element.size.width / 2);
+        CGFloat current = ((element.center.x - start) * progress) + start;
+        CGPoint newCenter = attr.center;
+        newCenter.x =  offset.x +current;
+        attr.center = newCenter;
+    }
+
+    if ([effects containsObject:@(ESConveyorEffectEdgeBottom)])
+    {
+        CGFloat start = pageSize.height + (element.size.height / 2);
+        CGFloat current = ((element.center.y - start) * progress) + start;
+        CGPoint newCenter = attr.center;
+        newCenter.y =  offset.y + current;
+        attr.center = newCenter;
+    }
+
+    return attr;
+}
+
+
+- (void)doParallax:(NSUInteger)page pageSize:(CGSize)pageSize progress:(CGFloat)progress attr:(UICollectionViewLayoutAttributes *)attr ratio:(CGFloat)speed direction:(BOOL)exiting   element:(ESConveyorElement *)element
+{
+    CGFloat pixelsPerPage = pageSize.width / speed;
+    CGFloat pixelsToMove = (page - element.inPage) * pixelsPerPage;
+    pixelsToMove = pixelsToMove - ( (pixelsPerPage * (1-progress)) * (exiting ? -1 : 1 ));
+
+    CGPoint newCenter = attr.center;
+    newCenter.x = newCenter.x - pixelsToMove;
+    attr.center = newCenter;
+}
+
+
+@end

Classes/ESConveyorElement.h

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+//
+// Created by Eduardo Scoz on 6/8/13.
+// Copyright (c) 2013 ESCOZ. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+
+@interface ESConveyorElement : NSObject
+
+@property(nonatomic) CGSize size;
+@property(nonatomic) CGPoint center;
+@property(nonatomic, strong) UIColor *color;
+@property(nonatomic, strong) UIView *view;
+
+@property(nonatomic, strong) NSArray *inEffects;
+@property(nonatomic, strong) NSArray *outEffects;
+
+@property(nonatomic) NSInteger inPage;
+@property(nonatomic) NSInteger outPage;
+
+
+@property(nonatomic, strong) NSArray *paginationEffects;
+
++ (ESConveyorElement *)elementForImageNamed:(NSString *)string;
++ (ESConveyorElement *)elementForImageNamed:(NSString *)imageName center:(CGPoint)center;
+
++ (ESConveyorElement *)elementForButtonOfClass:(Class)pClass title:(NSString *)title target:(id)target action:(SEL)action center:(CGPoint)center;
++ (ESConveyorElement *)elementForLabelOfClass:(Class)pClass text:(NSString *)text center:(CGPoint)center size:(CGSize)size;
+
+- (void)setEffects:(NSArray *)effects;
+
+- (void)setInEffects:(NSArray *)inEffects outEffects:(NSArray *)effects;
+- (void)setPage:(int)page;
+
+- (void)updateForPage:(NSUInteger)page totalPages:(NSInteger)pages progress:(CGFloat)progress offset:(CGPoint)offset;
+@end