iosfacebookfacebook-graph-apiorientation

Facebook Graph API - Wrong Image Orientation

I fix my app's orientation to be landscape only.

This is how I get the screenshot. 

UIImage *img = UIGraphicsGetImageFromCurrentImageContext();

and I change the orientation through

UIImage * landscapeImage = [[UIImage alloc] initWithCGImage: img.CGImage scale: 1.0 orientation: UIImageOrientationRight];

I use fb iOS SDK to post the screenshot to facebook. 

NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                               landscapeImage, @"picture",
                               SOME_URL,@"link",
                               @"Have fun",@"name",
                               @"Join the fun",@"message",
                               @"0",@"position",
                               nil];
[_facebook requestWithGraphPath:@"me/photos"
                                andParams:params
                            andHttpMethod:@"POST"
                              andDelegate:self];

The problem is that I cannot control the orientation and the orientation of the uploaded images are always either

-----
|   |
| P |
-----

or 

-----
|   |
| q |
-----

but i want the image to laid horizontally(landscape).

-------
|      |  
-------

thanks in advance!

Solution 
  •  UIGraphicsBeginImageContext(CGSizeMake(1024, 768));
        [rotateImg drawInRect:CGRectMake(0, 0, 1024, 768)];
        UIImage *landscapeImage = [UIGraphicsGetImageFromCurrentImageContext() retain];
        UIGraphicsEndImageContext();

    here is how to resolve the problem.

    UIimages's orientation is for "DISPLAY" only, you need to redraw the image