Проблем с изгледа на таблица в iOS при превъртане

Хей, момчета, имам проблем, имам табличен изглед с 4 изображения във всяка клетка, трябва да знам кое изображение е щракнато, затова сложих изображения на бутона

Всичко работи добре, но се задържа при превъртане, не се срива, просто заседна за секунда, след което превъртете отново. Може ли някой да помогне? ето кода:

-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

UIButton *b1, *b2, *b3, *b4;
UIImageView *lBut1,*lBut2,*lBut3,*lBut4;
if (cell == nil)        
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

b1 = [UIButton buttonWithType:UIButtonTypeCustom];
b1.frame = CGRectMake(y, y, x, x);
UIImage* img = [UIImage imageWithContentsOfFile:[dataArray objectAtIndex:indexPath.row*4]];
[b1 setBackgroundImage:img forState:UIControlStateNormal];
b1.tag = indexPath.row*4+1;
[b1 addTarget:self action:@selector(reportChoose:) forControlEvents:UIControlEventTouchUpInside];
lBut1 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Default.png"]];
lBut1.frame = CGRectMake(0, 0, x, x);
[lBut1 setAlpha:0.5];
[b1 addSubview:lBut1];
[lBut1 release];
[cell addSubview:b1];

if (indexPath.row * 4 + 1 < [dataArray count]) {
    b2 = [UIButton buttonWithType:UIButtonTypeCustom];
    b2.frame = CGRectMake(2*y+x, y, x, x);
    UIImage* img = [UIImage imageWithContentsOfFile:[dataArray objectAtIndex:indexPath.row*4 + 1]];
    [b2 setBackgroundImage:img forState:UIControlStateNormal];
    b2.tag = indexPath.row*4+2;
    [b2 addTarget:self action:@selector(reportChoose:) forControlEvents:UIControlEventTouchUpInside];
    lBut2 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Default.png"]];
    lBut2.frame = CGRectMake(0, 0, x, x);
    [lBut2 setAlpha:0.5];
    [b2 addSubview:lBut2];
    [lBut2 release];
    [cell addSubview:b2];
}

if (indexPath.row * 4 + 2 < [dataArray count]) {
    b3 = [UIButton buttonWithType:UIButtonTypeCustom];
    b3.frame = CGRectMake(3*y+2*x, y, x, x);
    UIImage* img = [UIImage imageWithContentsOfFile:[dataArray objectAtIndex:indexPath.row*4 + 2]];
    [b3 setBackgroundImage:img forState:UIControlStateNormal];
    b3.tag = indexPath.row*4+3;
    [b3 addTarget:self action:@selector(reportChoose:) forControlEvents:UIControlEventTouchUpInside];
    lBut3 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Defaulte.png"]];
    lBut3.frame = CGRectMake(0, 0, x, x);
    [lBut3 setAlpha:0.5];
    [b3 addSubview:lBut3];
    [lBut3 release];
    [cell addSubview:b3];
}
if (indexPath.row * 4 + 3 < [dataArray count]) {
    b4 = [UIButton buttonWithType:UIButtonTypeCustom];
    b4.frame = CGRectMake(4*y+3*x, y, x, x);
    UIImage* img =[UIImage imageWithContentsOfFile:[dataArray objectAtIndex:indexPath.row*4 + 3]];
    [b4 setBackgroundImage:img forState:UIControlStateNormal];
    b4.tag = indexPath.row*4+4;
    [b4 addTarget:self action:@selector(reportChoose:) forControlEvents:UIControlEventTouchUpInside];
    lBut4 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Defaulte.png"]];
    lBut4.frame = CGRectMake(0, 0, x, x);
    [lBut4 setAlpha:0.5];
    [b4 addSubview:lBut4];
    [lBut4 release];
    [cell addSubview:b4];
}

return cell;

}