如何使用图形API，目标C将本地图像发布到用户的朋友墙？

Question

I've try so many time to figure it out but it still not working.

NSString *full = [[NSBundle mainBundle] pathForResource:@"200" ofType:@"png"];
UIImage *image = [UIImage imageWithContentsOfFile:full];
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                               image,@"picture",
                               @"OK! I just trying to test",@"message",nil];
[facebook requestWithGraphPath:@"My_Friend_ID/feed" andParams:params andHttpMethod:@"POST" andDelegate:self];

This code post only message on my friend wall not with the image, I also try with this:

[facebook requestWithGraphPath:@"My_Friend_ID/photos" andParams:params andHttpMethod:@"POST" andDelegate:self];

This code dose post image on current user instead!

Can someone help?

Answer 1

I was unaware you can HTTP POST a photo directly to a friends stream or album. However, you can for the current logged in user IF you have publish_stream permissions. Please note, a app user cannot grant you friends_publish_stream because that permissions just doesn't exist.

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From the docs http://developers.facebook.com/docs/reference/api/user/

PHOTO connection of User

Create

You can post photos to a user's Wall on their behalf by issuing an HTTP POST request to PROFILE_ID/photos with the publish_stream permissions and the following parameters.

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And from albums docs: http://developers.facebook.com/docs/reference/api/album/

PHOTOS connection of Album

Create

You can add photos to an album by issuing an HTTP POST request to ALBUM_ID/photos with the publish_stream permissions and the following parameters.

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Here's some examples for iOS on how to upload a photo from the phone to a user's wall or album.

http://www.raywenderlich.com/1626/how-to-post-to-a-users-wall-upload-photos-and-add-a-like-button-from-your-iphone-app

http://www.icodeblog.com/2011/03/28/facebook-sdk-posting-to-user-news-feed/

http://blog.anscamobile.com/2011/12/uploading-photos-to-facebook-in-corona/

Answer 2

I don't think you can set an image file as an argument for posting to another user's wall. You can, however, post a link.
See Facebook's docs. Check the section about a Post's fields:

https://developers.facebook.com/docs/reference/api/post/