Question

In brief, the app is meant to do the following:

1. The user will select from the photos within the iPhone (via ALAssets). This part is fine.
2. The selected photo will appear on another view, within a smaller, rectangular subview.
3. When using the ALAsset thumbnail, the image shows up correctly within the subview. However, the resolution is poor, so I’m trying to use a higher resolution image.
4. When using the full resolution image, and then placing it into the view, any portrait photo will be rotated 90 degrees counter-clockwise.

Code-wise, this it looks like this:

//ImageView is the UIImageView subview that will hold the selected photo image.
//This code works ok, but I'd rather have a higher resolution photo.
[imageView setClipsToBounds:YES];
[imageView setContentMode:UIViewContentModeScaleAspectFill];
[imageView setImage:[UIImage imageWithCGImage:[selectedPhoto thumbnail]];

Now, this is the code where I try to use a higher resolution image, but then the image within imageView is rotated -90 degrees:

[imageView setClipsToBounds:YES];
[imageView setContentMode:UIViewContentModeScaleAspectFill];

//HIGH RESOLUTION IMAGE
ALAssetRepresentation *rep = [selectedPhoto defaultRepresentation];
CGImageRef iref = [rep fullResolutionImage];
if (iref) 
{
   UIImage *largeImage = [Utilities imageWithImage:[UIImage imageWithCGImage:iref] scaledToSize:CGSizeMake(CGImageGetWidth(iref)/4, CGImageGetHeight(iref)/4)]; 
   [imageView setImage:largeImage];
}

And the imageWithImage: function called there looks like this:

+ (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize {
    UIGraphicsBeginImageContext(newSize);
    [image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();    
    UIGraphicsEndImageContext();
    return newImage;
}

As mentioned, photos taken in landscape orientation by the iPhone camera come out OK. However, photos taken in portrait camera orientation come out rotated -90 degrees somehow.

How can I make it so that each photo, whether taken in portrait or landscape, will come out oriented correctly on my ImageView?

Any help would be appreciated! Thank you!

Answer 1

I found the answer here!

ALAssetRepresentation fullResolutionImage's UIImageOrientation is wrong

I am doing this now:

UIImage *largeImage = [[UIImage alloc] initWithCGImage:iref scale:4 orientation:(UIImageOrientation)rep.orientation];