uitableviewcell에서 버튼의 중복을 제거하는 방법?

Question

나는 초보자입니다. UITableView을 만들었으며 아래 코드를 사용하여 특정 행 (예 : 두 번째 행)에 UIButton을 추가했습니다. 내가 테이블보기를 스크롤 할 때 테이블에 버튼 복제가 나타납니다.

미리 감사드립니다. 제게 해결책을주십시오.

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath; 
{ 
    NSString *text = [items objectAtIndex:[indexPath row]]; 

    CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f); 

    CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap]; 

    CGFloat height = MAX(size.height, 44.0f); 

    if (indexPath.row ==1) { 
    return height + (CELL_CONTENT_MARGIN * 2) + CELL_HEIGHT; 
    } 
    else{ 
     return height + (CELL_CONTENT_MARGIN * 2); 
    } 
} 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    UITableViewCell *cell; 
    UILabel *label = nil; 
    cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"]; 
    if (cell == nil) 
    { 
     cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"Cell"] autorelease]; 

     label = [[UILabel alloc] initWithFrame:CGRectZero]; 
     [label setLineBreakMode:UILineBreakModeWordWrap]; 
     [label setMinimumFontSize:FONT_SIZE]; 
     [label setNumberOfLines:0]; 
     [label setFont:[UIFont systemFontOfSize:FONT_SIZE]]; 
     [label setTag:1]; 


     // [[label layer] setBorderWidth:2.0f]; 





    [[cell contentView] addSubview:label]; 
    } 


     if (indexPath.row==1) { 

      UIButton *Button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
      //Button.frame = CGRectMake(120, 120, 80, 24); 
      NSString *text =@"BUTTON" ; 
      CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f); 

      CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap]; 


      Button.frame = CGRectMake(65, 150, 160, 24); 

      [Button addTarget:self 
         action:@selector(load) 
      forControlEvents:UIControlEventTouchUpInside]; 
      Button.backgroundColor = [UIColor redColor]; 
      Button.layer.cornerRadius = 5; 
      [Button setTitle:text forState:UIControlStateNormal]; 
       [cell addSubview:Button]; 
     } 
    NSString *text = [items objectAtIndex:[indexPath row]]; 

    CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f); 

    CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap]; 

    if (!label) 
     label = (UILabel*)[cell viewWithTag:1]; 

    [label setText:text]; 
    [label setFrame:CGRectMake(CELL_CONTENT_MARGIN, CELL_CONTENT_MARGIN, CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), MAX(size.height, 44.0f))]; 

    return cell; 

} 

Answer 1

여러 개의 단추가 표시되는 이유는 cellForRowAtIndexPath가 호출 될 때마다 단추 인스턴스를 셀에 추가하기 때문입니다. 이 호출은 매우 자주 발생하며 셀은 재사용 (대기열에서 제외)됩니다.

if (index == 1) { 
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"**Cell**"]; 
else { 
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"**OtherCell**"]; 
}