根据点击位置获取UITableView当前行

    UIButton * bgBtn = [[UIButton alloc] initWithFrame:cell.mealImageView.frame];
    [cell addSubview:bgBtn];
    [bgBtn addTarget:self action:@selector(mealImageSingleTap: event:) forControlEvents:UIControlEventTouchUpInside];

-(void)mealImageSingleTap:(id)sender event:(id)event {
    
    if( event == nil) return ;
    NSSet *touches = [event allTouches];
    if( touches == nil ) return ;
    UITouch *touch = [touches anyObject];
    if( touch == nil ) return ;
    CGPoint currentTouchPosition = [touch locationInView:self.myTableView];
    NSIndexPath *indexPath = [self.myTableView indexPathForRowAtPoint: currentTouchPosition];
    NSInteger index = indexPath.row;
    NSInteger section = indexPath.section;
    NSString * keyStr = [[self.dataDic allKeys] objectAtIndex:section];
    NSArray * mealArr = [self.dataDic objectForKey:keyStr];
    VASMealInfo * mealInf = [mealArr objectAtIndex:index];
   
}