Loading url image array add to UIcollectionview - objective-c

Question

I want to load images array from Url and add to UICollectionView
Tony.pageImages =imagearray;
[Tony reloadData];
NSLog(#"imagearray%#",imagearray);
Tony is Collection view.h/m files. pageImages is NSMutableArray on the Tony.h files. The Image array display console log mean i got image array correctly
Those are Url.
but when i add code on the UICollectionView method it doesn't work
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell =
[collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
UIImageView *CollectionViewImage = (UIImageView *)[cell viewWithTag:120];
CollectionViewImage.image= [UIImage imageNamed:self.pageImages[indexPath.row]];
return cell;
}
Do i miss something ?
This is my imagearray
imagearray = [[NSMutableArray alloc]init];
for (int i = 0;i < comment.count; i++)
{
[imagearray addObject:comment[i][#"pic_url"]] ;
}

Answer 1

You have to implement and set the following dataSource delegate UICollectionViewDataSource in your viewcontroller:
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView
numberOfItemsInSection:(NSInteger)section {
return imagearray.count;
}

Answer 2

If I got it right, you need to load image from URL.
To do that simply add this code:
[CollectionViewImage.image setImageWithURL:[NSURL URLWithString:self.pageImages[indexPath.row]] placeholderImage:nil];
Or if you want to add placeholder image, just set placeholderImage:[UIImage imageNamed:#"someImageInYourAssets"];

Answer 3

NSData * imageData = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString:self.pageImages[indexPath.row]]];
UIImage *image = [UIImage imageWithData: imageData];
CollectionViewImage.image = image;
This is solution how solve problem loading image from url,without addition frameworks such as "Heneke","AFNetworking"..etc..In Objective C Image View can't communicated with URL directly, but can using NSData as Helper Object(wrapper).