iOS : Tableview 다중 선택 - AccessoryCheckmark 재사용 가능한 셀 확인

Question

섹션 및 다중 선택과 함께 tableview를 사용하고 있지만 하나의 행을 선택할 때 여러 행을 확인하는 데 문제가 있습니다 ... 이것에 대해 다른 스레드,하지만 정말 솔루션을하지 않았다 ... 여기

내 코드입니다 :

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *) indexPath 
{  
    [employeeTable deselectRowAtIndexPath:[employeeTable indexPathForSelectedRow] animated:NO]; 

    UITableViewCell *cell = [employeeTable cellForRowAtIndexPath:indexPath];  

    // get the letter in each section 
    NSString *alphabet = [charIndex objectAtIndex:indexPath.section]; 

    // get the names beginning with the letter 
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@", alphabet];  

    NSArray *names = [listOfNames filteredArrayUsingPredicate:predicate];  

    NSString *name = [names objectAtIndex:indexPath.row]; 

    for(int i = 0; i < [employeeConnection.employees count]; i++) 
    { 
     Employee *aEmployee = [employeeConnection.employees objectAtIndex:i]; 

     NSString *firstName = aEmployee.firstName; 
     NSString *lastName = aEmployee.lastName; 
     NSString *fullName = [NSString stringWithFormat:@"%@ %@", firstName, lastName]; 

     if([fullName isEqualToString:name]) 
     { 
      NSLog(@"Name: %@", name); 

      if (cell.accessoryType == UITableViewCellAccessoryNone) { 

       cell.accessoryType = UITableViewCellAccessoryCheckmark; 

       // Reflect selection in data model 
       [chosenEmployees addObject:aEmployee.employeeID]; 
       [chosenEmployeesNames addObject:name]; 

      } else if (cell.accessoryType == UITableViewCellAccessoryCheckmark) { 

       cell.accessoryType = UITableViewCellAccessoryNone; 

       // Reflect deselection in data model 
       [chosenEmployees removeObject:aEmployee.employeeID]; 
       [chosenEmployeesNames removeObject:name]; 
      } 
     } 
    } 
} 

업데이트 : 추가 cellForRowAtIndexPath

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) { 
     cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier]; 

     cell.textLabel.textColor = [UIColor whiteColor]; 
    } 

    // Get the letter in the current section 
    NSString *alphabet = [charIndex objectAtIndex:[indexPath section]]; 

    // Get the names beginning with the letter 
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@", alphabet]; 
    NSArray *names = [listOfNames filteredArrayUsingPredicate:predicate]; 

    if([names count] > 0) 
    { 
     // Extract the name 
     cell.textLabel.text = [names objectAtIndex:indexPath.row]; 
    } 

    return cell; 
} 

Answer 1

체크 된 ManagedObject (CoreData를 사용하는 경우) 또는 단순히 체크 된 IndexPath를 NSMutableSet 저장하는 것이 좋습니다. In-CellForRowAtIndexPath : 그러면 셀을 검사해야하는지 확인할 수 있습니다. 세포가 재사용되고 있기 때문에

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier]; 
    if (cell == nil) { 
     cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier]; 
     cell.textLabel.textColor = UIColor.whiteColor; 
    } 

    if ([self.checkedIndexPaths containsObject:indexPath]) { 
     cell.accessoryType = UITableViewCellAccessoryCheckmark; 
    } 
    else { 
     cell.accessoryType = UITableViewCellAccessoryNone; 
    } 

    return cell; 
} 

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    UITableViewCell *const cell = [tableView cellForRowAtIndexPath:indexPath]; 
    [table deselectRowAtIndexPath:indexPath animated:NO]; 

    if ([self.checkedIndexPaths containsObject:indexPath]) { 
     [self.checkedIndexPaths removeObject:indexPath]; 
     cell.accessoryType = UITableViewCellAccessoryNone; 
    } 
    else { 
     [self.checkedIndexPaths addObject:indexPath]; 
     cell.accessoryType = UITableViewCellAccessoryCheckmark; 
    } 
} 

Answer 2

, 당신은 cellForRowAtInexPath 테이블 데이터 소스 방식의 테이블에있는 모든 셀에 대해 ON 또는 OFF로 액세서리 마크를 설정해야합니다.

그래서 cell.accessoryType 셀 속성은 didSelectRow 대리자 메서드가 아니라 cellForRowAtInexPath에서 지정되어야합니다.

didSelectRow에서 배열의 선택된 행을 추적하고 셀 액세서리 표시를 none으로 설정하거나 배열 값에 따라 cellForRowAtInexPath를 선택 표시합니다.