What is the correct way to import & save Photos from iPhone Album?

Question

I am Importing Photos from the iPhone Album to the documents folder of my application. This is my code.

for (int j=0; j<[assetArray count]; j++) {

    A         


        

Answer 1

I was using ELCImagePicker and was facing same problem while importing multiple photos at a time from photos library using asselts. We can not reduce time taken to import but crash issue will be resolved.

for (int j=0; j<[assetArray count]; j++) 
{
    @autoreleasepool // This is compiler level feature so will only work on xcode 4.1 or above
    {
         ALAsset *assest = [assetArray objectAtIndex:j];
         CGImageRef imageRef = assest.defaultRepresentation.fullResolutionImage;
         UIImage *image = [UIImage imageWithCGImage:imageRef];
         NSData *imageData = UIImagePNGRepresentation(image);
         [imageData writeToFile:documentsPath atomically:YES];
    }
}

If possible try to store only AssetURL in assetArray instead of whole ALAsset object and create ALAsset at a time from url so may be it helps to reduce memory consumption. In such case you will need to use blocks as

ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myasset)
{
    CGImageRef iref = [[myasset defaultRepresentation] fullResolutionImage];
    if (iref) //You have image so use it 
    {
    }
};

ALAssetsLibraryAccessFailureBlock failureblock  = ^(NSError *myerror)
{
    NSLog(@"Can't get image - %@",[myerror localizedDescription]);
};

ALAssetsLibrary* assetslibrary = [[[ALAssetsLibrary alloc] init] autorelease];
[assetslibrary assetForURL:imageURL resultBlock:resultblock failureBlock:failureblock];