How to use image from url in UICollectionView ? - iphone

Question

My code is :
- (void)viewDidLoad
{
[super viewDidLoad];
UICollectionViewFlowLayout *layout=[[UICollectionViewFlowLayout alloc] init];
collectionView=[[UICollectionView alloc] initWithFrame:CGRectMake(30, 20, 260, 270) collectionViewLayout:layout];
[collectionView setDataSource:self];
[collectionView setDelegate:self];
[collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:#"cellIdentifier"];
[collectionView setBackgroundColor:[UIColor clearColor]];
[self.view addSubview:collectionView];
string1=[NSString stringWithFormat:url];
NSURL *jsonUrl = [NSURL URLWithString:string1];
NSData *data = [NSData dataWithContentsOfURL:jsonUrl];
UIImage *image1 =[[UIImage imageWithData:data]autorelease];
set=[NSArray arrayWithObject:image1];
tmp= [[NSMutableArray alloc] init];
for (int i=1; i<[set count]; i++)
{
[tmp addObject:[set objectAtIndex:i+1]];
}
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return [tmp count];
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:#"cellIdentifier" forIndexPath:indexPath];
cell.backgroundView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:[tmp objectAtIndex:indexpath.row]]] ;
cell.backgroundColor=[UIColor clearColor];
return cell;
}
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
return CGSizeMake(80, 80);
}
and I feel that this action does not work or when I hurt things
cell.backgroundview =[UIImageView alloc]initwithimage:[UIImage imageNamed:[tmp objectAtIndex:indexPath.row]]];

Answer 1

You do something wrong in your viewDidLoad
The only thing you need is to set a color to your UICollectionView so change your code like this for example :
[collectionView setBackgroundColor:[UIColor redColor]];
Assuming your array tmp is an array of image name (like "myImage.png") and and reload your collection view before the end of your viewDidLoad ;
[collectionView reloadData];

Answer 2

I have the solution for you try like that:
cell.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"nameImage.jpg"]];