UICollectionView - demoing 2 horizontal UICollectionViews with a top profile image

testCollectionVC.m

//
//  testCollectionViC.m
//
//  Created by Adam Chin
//  Copyright © 2016 HushBox. All rights reserved.
//

#import "testCollectionVC.h"
#import "CoreDataController.h"
#import "CoreDataHelper.h"
#import <CoreData/CoreData.h>
#import "Guests.h"
#import "GuestWishes.h"
#import "GuestBoxSwagCell.h"
#import "GuestBoxSwagPDFCell.h"

#define ImageHeaderHeightRegular 600
#define ImageHeaderHeightCompact 300
#define ContentContainerHeightRegular 1500
#define ContentContainerHeightCompact 1000

@interface testCollectionVC () <UICollectionViewDelegate, UICollectionViewDataSource, UIScrollViewDelegate>
{
    CGFloat imageViewYCoordinate;
    CGFloat belowImageViewYCoordinate;
}

@property (strong, nonatomic) IBOutlet UICollectionView *swagCollectionView;
@property (strong, nonatomic) IBOutlet UICollectionView *pdfCollectionView;
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;

@property (nonatomic, strong) NSMutableArray *gWishArray;
@property (nonatomic, strong) NSMutableArray *gWishPDFArray;

@property (strong, nonatomic) Guests *guest;
@property (strong, nonatomic) GuestWishes *currentObject;
@property (strong, nonatomic) NSManagedObjectContext *managedObjectContext;

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *imageHeaderHeight;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *contentContainerHeight;

@end

@implementation testCollectionViC

static NSString * const reuseIdentifier = @"Cell";

// MARK: View Delegate Methods
- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.swagCollectionView.delegate = self;
    self.swagCollectionView.dataSource = self;
    
    self.pdfCollectionView.delegate = self;
    self.pdfCollectionView.dataSource = self;
    
    [self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];

}

// Simply fade the image out and in based on scroll
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    // Fade header image up with scrolling
    
    // don't respond to the 2 collectionView scrollers
//    if (![scrollView isKindOfClass:[UICollectionView class]])
//    {
//        // calculate distance moved verticlaly into imageViewYcoord
//        float distMoved = scrollView.contentOffset.y;
//        imageViewYCoordinate = distMoved * 2;
//        self.headerImageView.alpha = 1 - imageViewYCoordinate/self.headerImageView.frame.size.height;
//        
//    }
}

// Singleline with two colors, pass in the string which will be the Normal Color, the rest in the highlight color
-(NSMutableAttributedString*)makeAttributedStringFromLabel:(NSString*)label andString:(NSString*)strVal
{
    UIColor *normalColor = SGAquaGreen;
    UIColor *highlightColor = [UIColor blackColor];
    // UIFont *font = [UIFont systemFontOfSize:12.0];
    
    NSDictionary *normalAttributes = @{NSForegroundColorAttributeName:normalColor};
    
    NSDictionary *highlightAttributes = @{NSForegroundColorAttributeName:highlightColor};
    
    NSAttributedString *normalText = [[NSAttributedString alloc] initWithString:label attributes:normalAttributes];
    
    NSAttributedString *highlightedText = [[NSAttributedString alloc] initWithString:strVal attributes:highlightAttributes];
    
    NSMutableAttributedString *finalAttributedString = [[NSMutableAttributedString alloc] initWithAttributedString:normalText];
    [finalAttributedString appendAttributedString:highlightedText];
    
    return finalAttributedString;
}

// MARK: Get & Set Data

-(void)getInitalViewData
{
    self.managedObjectContext = [[CoreDataController sharedInstance] newManagedObjectContext];
    
    self.gWishArray = [self setUpDataForCollections:@"app"];
    self.gWishPDFArray = [self setUpDataForCollections:@"web"];
}


// Set up predicate for sources, can call each source to set up each array:
-(NSMutableArray *)setUpDataForCollections:(NSString*)source
{
    NSPredicate *profilePredicate = [NSPredicate predicateWithFormat:@"guests == %@", self.guest];
    NSPredicate *sourcePredicate = [NSPredicate predicateWithFormat:@"source == %@", source];
    NSPredicate *finalPredicate = [NSCompoundPredicate andPredicateWithSubpredicates:@[profilePredicate, sourcePredicate]];
    NSMutableArray *returnArray = [CoreDataHelper searchObjectsForEntity:@"GuestWishes"
                                                           withPredicate:finalPredicate
                                                              andSortKey:@"displayOrder"
                                                        andSortAscending:YES
                                                              andContext:self.managedObjectContext];
    if (returnArray) return returnArray;
    else return nil;
    return nil;
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

// MARK: Trait collection changes

- (void) traitCollectionDidChange: (nullable UITraitCollection *) previousTraitCollection
{
    /* Check the horizontal trait environment and adjust the layout accordingly. Only deactivate active constraints. */
    if ([self.traitCollection containsTraitsInCollection: [UITraitCollection traitCollectionWithHorizontalSizeClass: UIUserInterfaceSizeClassCompact]])
    {
        self.imageHeaderHeight.constant = ImageHeaderHeightCompact;
        self.contentContainerHeight.constant = ContentContainerHeightCompact;
    }
    else
    {
        self.imageHeaderHeight.constant = ImageHeaderHeightRegular;
        self.contentContainerHeight.constant = ContentContainerHeightRegular;
    }
}

// MARK: UICollectionView Delegate methods

-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 1;
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    
    if ([collectionView isEqual:self.swagCollectionView])
    {
        return [self.gWishArray count];
    }
    else if ([collectionView isEqual:self.pdfCollectionView])
    {
        
        return [self.gWishPDFArray count];
    }
    else return 0;
    
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    
    if ([collectionView isEqual:self.swagCollectionView])
    {
        [self performSegueWithIdentifier:@"guestBoxSwagDetail" sender:[self.gWishArray objectAtIndex:indexPath.item]];
    }
    else if ([collectionView isEqual:self.pdfCollectionView])
    {
        [self performSegueWithIdentifier:@"pdfDetail" sender:[self.gWishPDFArray objectAtIndex:indexPath.item]];
    }
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    
    UICollectionViewCell *gbSwagCell = nil;
    
    if ([collectionView isEqual:self.swagCollectionView])
    {
        
        
        static NSString *identifier = @"cell";
        
        GuestBoxSwagCell *gbSwagCell = (GuestBoxSwagCell *)[self.swagCollectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
        
        
        if (gbSwagCell == nil)
        {
            gbSwagCell = [[GuestBoxSwagCell alloc] init];
 
        }
        
        GuestWishes *swag = (GuestWishes*)[self.gWishArray objectAtIndex:indexPath.item];
        UIImage *swagImage = [UIImage imageWithData:[swag largeImageData]];
        
        gbSwagCell.layer.cornerRadius = 5.0;
        gbSwagCell.layer.masksToBounds = YES;
        gbSwagCell.clipsToBounds = YES;
        gbSwagCell.swagImageView.image = swagImage;
        gbSwagCell.labelName.text = swag.name;
        gbSwagCell.labelName.textColor =  [UIColor whiteColor];
        gbSwagCell.labelName.backgroundColor = [UIColor clearColor];
        gbSwagCell.labelContainerView.backgroundColor = HBBlackAlphaBackground;
        gbSwagCell.labelName.adjustsFontSizeToFitWidth = true;
        gbSwagCell.backgroundColor = HBBlackAlphaBackground;
 
        return  gbSwagCell;
    }
    else
    {
        if ([collectionView isEqual:self.pdfCollectionView])
        {
            static NSString *identifier = @"pdfCell";
            
            GuestBoxSwagPDFCell *gbSwagCell = (GuestBoxSwagPDFCell *)[self.pdfCollectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
            
            if (gbSwagCell == nil)
            {
                gbSwagCell = [[GuestBoxSwagPDFCell alloc] init];
            }
            
            GuestWishes *swag = (GuestWishes*)[self.gWishPDFArray objectAtIndex:indexPath.item];
            UIImage *swagImage = [UIImage imageWithData:[swag largeImageData]];
            
            gbSwagCell.layer.cornerRadius = 5.0;
            gbSwagCell.layer.masksToBounds = YES;
            gbSwagCell.clipsToBounds = YES;
            gbSwagCell.swagImageView.image = swagImage;
            gbSwagCell.labelName.text = swag.name;
            gbSwagCell.labelName.textColor= [UIColor whiteColor];
            gbSwagCell.labelName.backgroundColor = [UIColor clearColor];
            gbSwagCell.pdfLabelContainerView.backgroundColor = [UIColor whiteColor];
     
            
            gbSwagCell.pdfLogo.image = [[UIImage imageNamed:@"pdf_icon2"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
            gbSwagCell.pdfLogo.tintColor = [UIColor lightGrayColor];
            gbSwagCell.contentMode = UIViewContentModeScaleAspectFit;
            
            return gbSwagCell;

        }
    }
    return gbSwagCell;
    
}

// Uncomment this method to specify if the specified item should be highlighted during tracking
- (BOOL)collectionView:(UICollectionView *)collectionView shouldHighlightItemAtIndexPath:(NSIndexPath *)indexPath {
	return YES;
}

// Uncomment this method to specify if the specified item should be selected
- (BOOL)collectionView:(UICollectionView *)collectionView shouldSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    return YES;
}

// Uncomment these methods to specify if an action menu should be displayed for the specified item, and react to actions performed on the item
- (BOOL)collectionView:(UICollectionView *)collectionView shouldShowMenuForItemAtIndexPath:(NSIndexPath *)indexPath {
	return NO;
}

- (BOOL)collectionView:(UICollectionView *)collectionView canPerformAction:(SEL)action forItemAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender {
	return NO;
}

- (void)collectionView:(UICollectionView *)collectionView performAction:(SEL)action forItemAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender {
	
}


@end