Collectionview cells won't render with CKAsset - ios8

Question

I'm no longer able to render collectionview cells after using data from Cloudkit via CKAssets. I was previously using images loaded in a folder on my desktop just for initial testing. I'm now using Cloudkit and I've created some test records via the CK dashboard using those same images. I was successfully able to query the CK database and retrieve the expected records. I then changed my code to populate the model data for the cells to use the CK data. That data previously came from the images retrieved locally. I can see from logging that I am getting the data from CK successfully, including the images. I can also see from logging that my custom CV cells are no longer getting initialed. From what I can tell, my code looks good based on examples I've seen online.
Can anyone help me with this? Thank you!
Designated initializer in the model...
- (instancetype)initImagesForSelection:(NSString *)selectionType {
self = [super init];
if (self) {
CKDatabase *publicDatabase = [[CKContainer defaultContainer] publicCloudDatabase];
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"ImageDescription = 'description'"];
CKQuery *query = [[CKQuery alloc] initWithRecordType:#"ImageData" predicate:predicate];
[publicDatabase performQuery:query inZoneWithID:nil completionHandler:^(NSArray *results, NSError *error) {
// handle the error
if (error) {
NSLog(#"Error: there was an error querying the cloud... %#", error);
} else {
// any results?
if ([results count] > 0) {
NSLog(#"Success querying the cloud for %lu results!!!", (unsigned long)[results count]);
for (CKRecord *record in results) {
ImageData *imageData = [[ImageData alloc] init];
CKAsset *imageAsset = record[#"Image"];
imageData.imageURL = imageAsset.fileURL;
NSLog(#"asset URL: %#", imageData.imageURL);
imageData.imageName = record[#"ImageName"];
//imageData.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:imageAsset.fileURL]];
imageData.image = [UIImage imageWithContentsOfFile:imageAsset.fileURL.path];
NSLog(#"image size height:%f, width:%f", imageData.image.size.height, imageData.image.size.width);
[self.imageDataArray addObject:imageData];
}
NSLog(#"imageDataArray size %lu", (unsigned long)[self.imageDataArray count]);
}
}
}];
}
return self;
}
Collectionview viewcontroller which worked perfectly before pulling the data from Cloudkit...
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell"; // string value identifier for cell reuse
ImageViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];
NSLog(#"cellForItemAtIndexPath: section:%ld row:%ld", (long)indexPath.section, (long)indexPath.row);
cell.layer.borderWidth = 1.0;
cell.layer.borderColor = [UIColor grayColor].CGColor;
ImageData *imageData = [self.imageLoadManager imageDataForCell:indexPath.row];
cell.imageView.image = imageData.image;
cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
return cell;
}

Answer 1

Ok, I figured this out. My code was actually working. The collectionview was not displaying due to a multithreading/asynchronous download issue with the data from cloudkit. I hit the camera button to take a pic, which refreshed the CV and everything in the CV appeared. I just need to use multithreading so things start rendering while the images are downloading.