UIImage+TPAdditions.m

@implementation UIImage (TPAdditions)
 
-(id)initWithContentsOfResolutionIndependentFile:(NSString*)path {
	if([[[UIDevice currentDevice] systemVersion] intValue] >=4&&[[UIScreen mainScreen] scale]==2.0){
		NSString*path2x =[[path stringByDeletingLastPathComponent] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@@2x.%@", [[path lastPathComponent] stringByDeletingPathExtension], [path pathExtension]]];
 
        if([[NSFileManager defaultManager] fileExistsAtPath:path2x]){
        	return[self initWithCGImage:[[UIImage imageWithData:[NSData dataWithContentsOfFile:path2x]] CGImage] scale:2.0 orientation:UIImageOrientationUp];
        }
    }
    return[self initWithData:[NSData dataWithContentsOfFile:path]];
}
 
+(UIImage*)imageWithContentsOfResolutionIndependentFile:(NSString*)path {
	return[[[UIImage alloc] initWithContentsOfResolutionIndependentFile:path] autorelease];
}
 
@end