self.edgesForExtendedLayout = UIRectEdgeAll;

  self.automaticallyAdjustsScrollViewInsets=NO;

    /**

     - (void)automaticallyAdjustsScrollViewInsets{

     if ([[[UIDevice currentDevice] systemVersion] floatValue] > 6.9) {

     [super setAutomaticallyAdjustsScrollViewInsets:flag];

     }

    */