Reference (Old Docs)
FBSDKSharing
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The common interface for components that initiate sharing.

Extends Protocol:NSObject
Declared in:FBSDKSharing.h
Properties
delegate

The receiver's delegate or nil if it doesn't have a delegate.

@property (nonatomic, weak) id<FBSDKSharingDelegate> delegate;
Declared In: FBSDKSharing.h
shareContent

The content to be shared.

@property (nonatomic, copy) id<FBSDKSharingContent> shareContent;
Declared In: FBSDKSharing.h
shouldFailOnDataError

A Boolean value that indicates whether the receiver should fail if it finds an error with the share content.

@property (nonatomic, assign) BOOL shouldFailOnDataError;
Discussion:

If NO, the sharer will still be displayed without the data that was mis-configured. For example, an invalid placeID specified on the shareContent would produce a data error.

Declared In: FBSDKSharing.h
Instance Methods
validateWithError:

Validates the content on the receiver.

ParameterDescription
errorRef

If an error occurs, upon return contains an NSError object that describes the problem.

- (BOOL) validateWithError:(NSError **)errorRef;
Declared In: FBSDKSharing.h