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iOS Build a Photo Browser iPhone App Gestures Creating a Detail View Controller

Posted by Jonah Kesoyan
Jonah Kesoyan
2,055 Points

Show image when clicked in new VC from Parse!

So I want to do exactly all this, except all my pictures are in parse. And I think my problem is the code in PhotoController.h and .m, what code do I need to write so when I click each individual cell, it will get bigger, THANKS FOR THE HELP

PhotoController.h

#import <Foundation/Foundation.h>
#import <Parse/Parse.h>

@interface PhotoController : NSObject

@property (nonatomic) NSArray *photos;

+ (void)imageForPhoto:(NSDictionary *)photo size:(NSString *)size completion:(void(^)(UIImage *image))completion;

@end

PhotoController.m

#import "PhotoController.h"

@implementation PhotoController

+ (void)imageForPhoto:(NSDictionary *)photo size:(NSString *)size completion:(void(^)(UIImage *image))completion {
    if (photo == nil || size == nil || completion == nil) {
        return;
    }


    PFQuery *query = [PFQuery queryWithClassName:@"Photo"];

    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error) {
            NSLog(@"%d", objects.count);
        }
    }];

}

@end

5 Answers

Ben Jakuben
STAFF
Ben Jakuben
Treehouse Teacher
Ben Jakuben
Ben Jakuben
Treehouse Teacher

Hi Jonah,

Where are you calling this code from? Can you paste in the code from your inbox? Are you performing a segue to this view controller? I'm confused as to why this would be a static class method (+ instead of -).

Jonah Kesoyan
Jonah Kesoyan
2,055 Points

Well, here is my DetailViewController.m. So after you click on each cell, it will go here.

@interface SeparateImageViewController ()

@property (nonatomic) UIImageView *userImageView;


@end

@implementation SeparateImageViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor colorWithWhite:1.0 alpha:0.95];

    self.userImageView = [[UIImageView alloc] init];
    [self.view addSubview:self.userImageView];

    self.userImageView.image = _image;

//    [PhotoController imageForPhoto:self.photo size:@"standard_resolution" completion:^(UIImage *image) {
//        self.userImageView.image = image;
//    }];

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(close)];
    [self.view addGestureRecognizer:tap];
}

-(void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];

    CGSize size = self.view.bounds.size;

    CGSize imageSize = CGSizeMake(size.width, size.width);
    self.userImageView.frame = CGRectMake(0.0, (size.height - imageSize.height) / 2.0, imageSize.width, imageSize.height);
}

-(void)close {
    [self dismissViewControllerAnimated:YES completion:nil];
}

@end
Jonah Kesoyan
Jonah Kesoyan
2,055 Points
Jonah Kesoyan
Jonah Kesoyan
2,055 Points

And here is the PhotoCell.m

@implementation PhotoCell

@synthesize parseImage;

-(void)setPicture:(NSDictionary *)picture {
    _picture = picture;

//    [PhotoController imageForPhoto:_picture size:@"thumbnail" completion:^(UIImage *image) {
//        self.imageView.image = image;
//    }];

}


- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        self.imageView = [[PFImageView alloc] init];



        [self.contentView addSubview:self.imageView];
    }
    return self;
}


-(void)layoutSubviews {
    [super layoutSubviews];

    self.imageView.frame = self.contentView.bounds;

}

@end
Jonah Kesoyan
Jonah Kesoyan
2,055 Points
Jonah Kesoyan
Jonah Kesoyan
2,055 Points

So once again, I want to click on a cell in a collectionview and have it go to a different view controller, like instagram

Jonah Kesoyan
Jonah Kesoyan
2,055 Points
Jonah Kesoyan
Jonah Kesoyan
2,055 Points

By the way, here is my didSelectItemAtIndexPath in my collection view class:

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    NSDictionary *photo = self.photos[indexPath.row];
    SeparateImageViewController *viewController = [[SeparateImageViewController alloc] init];
    viewController.modalPresentationStyle = UIModalPresentationCustom;
    viewController.transitioningDelegate = self;
    viewController.photo = photo;

    [self presentViewController:viewController animated:YES completion:nil];
}
Ben Jakuben
STAFF
Ben Jakuben
Treehouse Teacher
Ben Jakuben
Ben Jakuben
Treehouse Teacher

So sorry for my late reply here. Are you still having trouble with this? Where exactly is it breaking?