Create an array of UIImages from camera roll - objective-c

Question

I would like to get all of the images from the camera roll and create an array of UIImages from them.
I have been trying to figure out how to do this for about a day now and I've gotten nowhere. I can't seem to figure out how to retrieve only items from the Camera Roll. It appears that all of the samples that I've seen all enumerate over all of the photo albums. I might be wrong about that though.
Any help would be appreciated. Thanks!

Answer 1

Have you tried ALAssetsLibrary? like this:
assets = [[NSMutableArray array] init]; // Prepare array to have retrieved images by Assets Library.
void (^assetEnumerator)(ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *asset, NSUInteger index, BOOL *stop) {
if(asset != NULL) {
[assets addObject:asset];
dispatch_async(dispatch_get_main_queue(), ^{
[self insertArray];
});
}
};
void (^assetGroupEnumerator)(ALAssetsGroup *, BOOL *) = ^(ALAssetsGroup *group, BOOL *stop) {
if(group != nil) {
[group enumerateAssetsUsingBlock:assetEnumerator];
}
};
// Create instance of the Assets Library.
library = [[ALAssetsLibrary alloc] init];
[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos // Retrieve the images saved in the Camera roll.
usingBlock:assetGroupEnumerator
failureBlock: ^(NSError *error) {
NSLog(#"Failed.");
}];
that'll nab them. then do this to render them (this is wicked hacky. you'll want to import them as needed and not all at once like this, or you'll run into memory issues and crash)
-(void) insertArray {
int i = assetCount++;
if (i>20) {
return;
}
ALAssetRepresentation *rep = [[assets objectAtIndex:i] defaultRepresentation];
CGImageRef iref = [rep fullResolutionImage];
CGSize cSize = CGSizeMake(75,75);
UIImage *largeimage = [UIImage imageWithCGImage:iref];
UIImage *resizedimage = (UIImage *)[largeimage resizedImage:cSize interpolationQuality:kCGInterpolationHigh];
UIImageView *newView = [[UIImageView alloc] initWithImage:resizedimage];
if((i>0)&&(i%4 == 0)){
rowCount++;
}
colCount = i%4;
newView.frame = CGRectMake(4+(colCount*(75+4)), 4+(rowCount*(75+4)), 75, 75);
[sv addSubview:newView];
[sv setContentSize:CGSizeMake(320, 85+(rowCount*(75+4)))];
NSLog(#"sv frame size is %# and i is %i", NSStringFromCGRect(sv.frame), i);
}