How to insert images in uicollectionview programmatically? - ios

Question

I'm pretty new to Objective-C so hopefully this all makes sense..I ran code provided in first answer Creating a UICollectionView programmatically..It is working fine .Now i want to add some pictures in cell that can expanded by mouse click .I searched many tutorial but all using nib files or storyboard files .How i can accomplish this task programmatically ?
Any help would be greatly appreciated. Thanks in advance.

Answer 1

as Logan suggest:
#define IMG_TAG 1000
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"MyCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
// Configure the cell...
cell.textLabel.text = #"test.....";
UIImage * img = [UIImage imageNamed: #"sampleImage"];
UIImageView * customImageView = (UIImageView*) [cell viewWithTag: IMG_TAG];
// two cases:
// 1) we got a "recycled" cell, so we already have an image view added
// 2) we got a "new" cell, so we must create, add image view AND TAg
// in both cases we will set image
if (customImageView){
// case 1
// nothing special
}else{
// case 2:
// add and tag:
customImageView = [[UIImageView alloc]initWithFrame:CGRectMake(100, 2, 30, 30)];
[cell addSubview: customImageView];
customImageView.tag = IMG_TAG;
}
customImageView.image = img;
return cell;
}
pls review and upvote :)

Answer 2

Beginner read tutroial and understand first everyting in below link and apple doc
ios-programming-uicollectionview-tutorial-with-sample-code
https://developer.apple.com/library/ios/documentation/UIKit/Reference/UICollectionView_class/Reference/Reference.html
change this your blackground color like this approach
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:#"cellIdentifier" forIndexPath:indexPath];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image = [UIImage imageNamed:[recipeImages objectAtIndex:indexPath.row]];
cell.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"photo-frame.png"]];
[self.view addSubview:recipeImageView];
cell.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:[recipeImages objectAtIndex:indexPath.row]]];
return cell;
}
output:

Answer 3

NOTE:
code above is WRONG!
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:#"cellIdentifier" forIndexPath:indexPath];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image = [UIImage imageNamed:[recipeImages objectAtIndex:indexPath.row]];
cell.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"photo-frame.png"]];
[self.view addSubview:recipeImageView];
cell.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:[recipeImages objectAtIndex:indexPath.row]]];
return cell;
}
You allocate (better to allocate ONCE unsung TAGs...) but the code will ADD subview EVERY time cellForItemAtIndexPath is called.