No type or storage class may be specified here before 'interface'/'interface' iOS Error (Corrupted Xcode?)

This interface is giving the errors:

@interface VideoFeedCollector : NSObject{
    @public
    NSData * rece开发者_如何学Cived_data;
    int feed_id;
    BOOL transmitting;
}

THank you.

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No @end with one of the interface declarations.

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Either a circular #import or a syntax error in the .m file that imports this header or a syntax error in one of the headers.