Loading images in collection view from documents folder - ios

Question

I have a list of images in my resources folder that I want to load into a collection view
I have my images file names in an NSAarray from the documents directory.
.h
{
NSArray *fileList;
NSString * searchedImage;
}
.m
NSFileManager *filesm = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSArray *getFilelist= [filesm contentsOfDirectoryAtPath:[paths objectAtIndex:0] error:nil];
BOOL isDirectory;
for (searchedImage in getFilelist){
BOOL fileExistsAtPath = [[NSFileManager defaultManager] fileExistsAtPath:searchedImage isDirectory:&isDirectory];
if (fileExistsAtPath) {
if (isDirectory)
{
//Found Directory
}
}
if ([[searchedImage pathExtension] isEqualToString:#"png"]) {
//This is Image File with .png Extension
NSLog(#"directoryContents = %#",searchedImage);
}
}
//count files
NSFileManager *fm = [NSFileManager defaultManager];
NSArray *pathsAmount = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
fileList= [fm contentsOfDirectoryAtPath:[pathsAmount objectAtIndex:0] error:nil];
int filesCount = [fileList count];
NSLog(#"filesCount:%d", filesCount);
UINib *cellNib = [UINib nibWithNibName:#"NibCell" bundle:nil];
[self.appliancesCollectionView registerNib:cellNib forCellWithReuseIdentifier:#"cvCell"];
}
return self;
}
this reurns my image names correctly as 63293446.png, appliance63293447.png, appliance63293448.png, appliance63293449.png, etc in viewDidLoad
I want to load these into my collection view cells. Currently it returns a null value for my images file names when in the -(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath method
What ive tried so far in addtion to researching on here
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return fileList.count;
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellIdentifier = #"cvCell";
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath];
cell.backgroundView = [[UIImageView alloc] initWithImage: [UIImage imageNamed: [NSString stringWithFormat:#"%#",searchedImage]]];
NSLog(#"cell Bg image %#",searchedImage); <-----------------//returns null
return cell;
}

Answer 1

try this code
cell.backgroundView = [[UIImageView alloc] initWithImage: [UIImage imageNamed: [NSString stringWithFormat:#"%#",[fileList objectAtIndex:indexPath.row]]]];
make sure searchedImage is not nil.

Answer 2

The file name of the image is in your fileList array, not in searchedImage, (this last variable is useless when creating the image).
NSString *fileName = [fileList objectAtIndex:indexPath.row];
cell.backgroundView = [[UIImageView alloc] initWithImage: [UIImage imageNamed: fileName]];
The problem here is that in your code, fileList can contain files that are not images, thus imageNamed: will fail, and return nil. You should filter your fileList array, and make sure it contains only images.

Answer 3

At first make fileList mutable via NSMutableArray *fileList;
next in block add image path to fileList
if ([[searchedImage pathExtension] isEqualToString:#"png"]) {
//This is Image File with .png Extension
NSLog(#"directoryContents = %#",searchedImage);
[fileList addObject:searchedImage]
}
then in cellForItemAtIndexPath: set image with
cell.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageWithContentsOfFile:[fileList objectAtIndex:indexPath.row]]];