How to post a UIImage to Facebook wall (iPhone/iPad)? - iphone

Question

I have been looking around online at how to post a UIImage to the users Facebook wall using the Facebook SDK. However I'm really confused what the simplest option is. So far I have only used the Facebook SDK to create a connection and post a message to the wall like so:
// Create message
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
#"Blah", #"name",
#"", #"caption",
#"", #"description",
#"http://www.xyz.com", #"link",
#"", #"picture", // THIS IS NOT BIG ENOUGH
nil];
// Post it to the users feed
[facebook dialog:#"feed" andParams:params andDelegate:nil];
This seems to work nicely and allows me to upload a short amount of text as well as an image. The issue I'm having is that the image is far too small. I need a way of allowing the user to upload a larger (in terms of viewing size) image as well as a short caption.
Please can someone offer a solution (ideally that could work off my existing code)?

Answer 1

I managed to achieve this thanks to #Malek_Jundi. Here is the code I used:
NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys:[facebook accessToken], #"access_token",nil];
[params setObject:#"Caption to go with image" forKey:#"name"];
[params setObject:myImage forKey:#"source"]; // myImage is the UIImage to upload
[facebook requestWithGraphPath:#"me/photos"
andParams: params
andHttpMethod: #"POST"
andDelegate:(id)self];