Method for getting an array of MIME types for images that ImageIO and UIKit can understand.

imageMimeTypesArray.m

@import ImageIO;
@import MobileCoreServices;

+ (NSArray *) imageMIMETypes {
    NSArray             *result               = nil;
    NSMutableArray      *mimeTypes            = nil;
    NSArray             *typeIdentifiers      = nil;
    
    typeIdentifiers = (__bridge_transfer NSArray*)CGImageSourceCopyTypeIdentifiers();
    mimeTypes = [[NSMutableArray alloc] init];
    for (NSString *type in typeIdentifiers){
        NSString	*MIMETypeString = nil;
        
        MIMETypeString = CFBridgingRelease(UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)type, kUTTagClassMIMEType));
        if ([MIMETypeString length] > 0){
            [mimeTypes addObject:MIMETypeString];
        }
    }
    result = [mimeTypes copy];
    return result;
}