How to share screenshot on facebook from iphone using facebook sdk - ios

Question

I am fairly new to this field. Can any please help in sharing the in app screenshot to facebook. I have been trying to share screenshot using the [FBDialogs presentShareDialogWithParams] but then it says only FBLinkShareParams: only \"http\" or \"https\" schemes are supported for link thumbnails.
How can we share a in app screenshot of ios device on facebook ?

Answer 1

Hope this helps
-(void)FBshareScreenshot{
if ([FBDialogs canPresentShareDialogWithPhotos]) {
FBPhotoParams *params = [[FBPhotoParams alloc] init];
UIImage *screenshot = [self captureScreenshot]; //calling to capture screenshot
params.photos = #[screenshot];
[FBDialogs presentShareDialogWithPhotoParams:params
clientState:nil
handler:^(FBAppCall *call, NSDictionary *results, NSError *error) {
if(error) {
NSLog(#"Error publishing story = %#.", error);
NSLog(#"result = %#.", results);
} else if (results[#"completionGesture"] && [results[#"completionGesture"] isEqualToString:#"cancel"]) {
NSLog(#"User canceled photo publishing.");
} else {
NSLog(#"photo posted");
}
}];
}else {
//The user doesn't have the Facebook for iOS app installed, so we can't present the Share Dialog
/*Fallback: You have two options
1. Share the photo as a Custom Story using a "share a photo" Open Graph action, and publish it using API calls.
See our Custom Stories tutorial: https://developers.facebook.com/docs/ios/open-graph
2. Upload the photo making a requestForUploadPhoto
See the reference: https://developers.facebook.com/docs/reference/ios/current/class/FBRequest/#requestForUploadPhoto:
*/
}
}
-(UIImage *)captureScreenshot{
UIGraphicsBeginImageContext(self.view.bounds.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *imageView = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
// UIImageWriteToSavedPhotosAlbum(imageView, nil, nil, nil);
return imageView;
}