fix ios 11 table extra top margin in an existed project

fixTableViewTopMargin.m

    if([[UIDevice currentDevice]userInterfaceIdiom]==UIUserInterfaceIdiomPad){
        if (@available(iOS 11, *)) {
            self.accountTableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
        }
        else {
            self.accountTableView.contentInset = UIEdgeInsetsMake(-64, 0, 0, 0);
        }
    }