Posting an image from a file instead to Facebook? - iphone

Question

How would I go about posting an image from a file instead to Facebook? This works fine:
SLComposeViewController *controllerSLC = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
[controllerSLC setInitialText:#" iPhone app"];
[controllerSLC addURL:[NSURL URLWithString:#"http://www.example.com"]];
[controllerSLC addImage:[UIImage imageNamed:#"icon.png"]];
However I'm trying to send an image from:
self.imageView.image = [self.photo objectForKey:photoPictureKey];

Answer 1

Try this mate (iOS6),
send your image to this method,
Make Sure you add Social.framework and #import <Social/Social.h>
-(void) uploadToFaceBook:(UIImage *) image{
if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook]){
SLComposeViewController *fbController =[SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
SLComposeViewControllerCompletionHandler __block completionHandler=
^(SLComposeViewControllerResult result){
[fbController dismissViewControllerAnimated:YES completion:nil];
switch(result){
case SLComposeViewControllerResultCancelled:
default:
{
NSLog(#"Cancelled.....");
}
break;
case SLComposeViewControllerResultDone:
{
NSLog(#"Posted....");
UIAlertView * alert = [[UIAlertView alloc] initWithTitle:#"Sent" message:nil delegate:nil cancelButtonTitle:#"Dismiss" otherButtonTitles: nil];
[alert show];
}
break;
}};
[fbController addImage:image];
[fbController setInitialText:#" iPhone App"];
[fbController addURL:[NSURL URLWithString:#"http://www.example.com"]];
[fbController setCompletionHandler:completionHandler];
[self presentViewController:fbController animated:YES completion:nil];
}
else{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Sorry"
message:#"You can't post on Facebook right now, make sure your device has an internet connection and you have at least one Facebook account setup"
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alertView show];
}
}

Answer 2

if this [self.photo objectForKey:photoPictureKey] code returns the path of the image you can use UIImage class method that is imageWithContentsOfFile:
UIImage *fbImage = [UIImage imageWithContentsOfFile:[self.photo objectForKey:photoPictureKey]];
Then check fbImage is it is not nil before adding it to the instance of the class SLComposeViewController
if(fbImage!=nil){
[controllerSLC addImage: image];
}else{
NSLog('image is nil');
}
if this "[self.photo objectForKey:photoPictureKey]" code returns the a UIImage instance then do this:
UIImage *fbImage = [self.photo objectForKey:photoPictureKey];
if(fbImage!=nil){
[controllerSLC addImage: fbImage];
}else{
NSLog('image is nil');
}
you can also check if fbImage is null by:
if(fbImage!=nil && !([fbImage isKindOfClass:[NSNull class]])){
[controllerSLC addImage: fbImage];
}