objective-c - 如何从 uitableview 单元格的不同部分中的数组生成行上的不同数据

Question

我有一些数据库，我正在生成类似这样的数据。

首先从数据库中获取categoryid和categoryName。表的sectiontitle是categoryName。

这是一些示例代码

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return categoryNamesList.count;
}

-(NSString *) tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    return [categoryNamesList objectAtIndex:section];   

}

我想根据类别 ID 生成抽认卡 ID 和抽认卡名称。 CategoryID 存储在数据库中，如 1,2,3。

所以我在查询中传递categoryid:

select flashCardId,flashCardName from flashCardInfo where categoryId=(parameter)

在 flashcardid 中，我得到 1,2,3，在 flashcards 名称数组中，我第一次得到 flashcard1,flashcard2,flashcard3，现在我想在单元格上生成文本，如第 1 部分的第一个类别名称，然后在第 1 部分上生成相关的抽认卡名称然后是第二部分第二个类别名称上的行以及行上的相关抽认卡名称。在哪里增加类别 id 以便我获得下一个名称和 id 以及如何在单元格上设置文本

现在我该如何生成它

这是代码；它位于 indexviewcontroller.m 文件中。

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return categoryNamesList.count;
}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {  

    return flashCardsNamesList.count;       

}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

static NSString *CellIdentifier = @"Cell";  
CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];  
if (cell == nil) {      
    cell = [[[CustomCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];      
}


    if(categoryID<listOfCategoryId.count)
    {   
        for(int i=0;i<flashCardsNamesList.count;i++)
        {
        [cell.FlashCardsNames setText:[flashCardsNamesList objectAtIndex:i]];
        }       
    categoryID++;
    [self getFlashCard:categoryID];
    }           
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [indexTableView deselectRowAtIndexPath:indexPath animated:YES];

    for(int i=0;i<flashCardsId.count;i++)
    {
            questionViewControllerObj = [[flashCardQuestionViewController alloc] initWithNibName:@"FlashCardQuestionView" bundle:[NSBundle mainBundle]];
            [self.navigationController pushViewController:questionViewControllerObj animated:YES];                  
            questionViewControllerObj.flashcardid = [[flashCardsId objectAtIndex:i] intValue];
            questionViewControllerObj.categoryid = [[listOfCategoryId objectAtIndex:indexPath.section]intValue];
    }

}


/*
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

    if (editingStyle == UITableViewCellEditingStyleDelete) {
    }
    if (editingStyle == UITableViewCellEditingStyleInsert) {
    }
}
*/
/*
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    return YES;
}
*/
/*
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
}
*/
/*
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
    return YES;
}
*/

-(NSString *) tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    return [categoryNamesList objectAtIndex:section];   

}

# pragma mark -
# pragma mark viewDidLoad

- (void)viewDidLoad {
    [super viewDidLoad];    
    [self getIntialData];
    self.navigationItem.title = @"Index";
    indexTableView.backgroundColor = [UIColor lightGrayColor];  
}


- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated {
}

- (void)viewDidDisappear:(BOOL)animated {
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

#pragma mark -
#pragma mark Database Methods


-(void)getIntialData
{
    [self getcategory];
    [self getFlashCard:categoryID]; 

}
  //getting categoryid,categoryname from the database
-(void)getcategory
{
    if(listOfCategoryId!=nil)
        [listOfCategoryId removeAllObjects];
    else
        listOfCategoryId = [[NSMutableArray alloc] init];

    if(categoryNamesList!=nil)
        [categoryNamesList removeAllObjects];
    else
        categoryNamesList = [[NSMutableArray alloc] init];

    if(listOfCategoryType!=nil)
        [listOfCategoryType removeAllObjects];
    else
        listOfCategoryType = [[NSMutableArray alloc] init];

    clsDatabase *clsDatabaseObject = [[clsDatabase alloc] init];
    sqlite3_stmt *dataRows = [clsDatabaseObject getDataset:"select categoryId,categoryName,categoryType from cardCategoryInfo"];
    while(sqlite3_step(dataRows) == SQLITE_ROW)
    {       
        [listOfCategoryId addObject:[NSNumber numberWithInt:sqlite3_column_int(dataRows,0)]];
        [categoryNamesList addObject: [NSString stringWithUTF8String:(char *)sqlite3_column_text(dataRows,1)]] ;
        [listOfCategoryType addObject:[NSNumber numberWithInt:sqlite3_column_int(dataRows,2)]];
    }
    sqlite3_finalize(dataRows);
    [clsDatabaseObject release];    
    categoryID = [[listOfCategoryId objectAtIndex:categoryID] intValue];
}


   //getting flashcardId and flashcard name from categoryid
-(void)getFlashCard:(int)categoryid
{
    if(flashCardsId!=nil)
        [flashCardsId removeAllObjects];
    else
        flashCardsId = [[NSMutableArray alloc] init];

    if(flashCardsNamesList!=nil)
        [flashCardsNamesList removeAllObjects];
    else
        flashCardsNamesList = [[NSMutableArray alloc] init];



    NSString *martialStr=[NSString stringWithFormat:@"%d", categoryid];

    NSString *queryStr=[[NSString alloc] initWithString:@"select flashCardId,flashCardName from flashCardInfo where categoryId="];
    queryStr=[queryStr stringByAppendingString:martialStr];


    unsigned int lengthOfString=[queryStr length];
    char temp2[lengthOfString +1];
    strcpy(temp2, [queryStr cStringUsingEncoding:NSUTF8StringEncoding]);    
    clsDatabase *clsDatabaseObject = [[clsDatabase alloc] init];    
    sqlite3_stmt *dataRows = [clsDatabaseObject getDataset:temp2];
    while(sqlite3_step(dataRows) == SQLITE_ROW)
    {       
        [flashCardsId addObject:[NSNumber numberWithInt:sqlite3_column_int(dataRows,0)]];       
        [flashCardsNamesList addObject:[NSString stringWithUTF8String:(char *)sqlite3_column_text(dataRows,1)]];    

    }
    sqlite3_finalize(dataRows);
    [clsDatabaseObject release];

}

- (void)dealloc {
    [self.navigationController popViewControllerAnimated:YES];
    [listOfCategoryId release];
    [listOfCategoryType release];
    [questionViewControllerObj release];
    [categoryNamesList release];
    [flashCardsNamesList release];
    [flashCardsId release];
    [indexTableView release];   
    [super dealloc];
}



@end

Answer 1

您需要实现 cellForRowAtIndexPath 来填充每个表部分中的行。

例如

- (UITableViewCell *)tableView:(UITableView *)tableView
    cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
  // This method gets called for each section and row in your table
  NSUInteger cellRow = [indexPath row];
  NSUInteger cellSection = [indexPath section];

  // Create new table cell
  // Deliberately ignoring reusing cells to keep this example simple
  UITableViewCell *cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"MyIdentifier"] autorelease];

  // Now build up a string with the info you want in it based on
  // data in cellSection and cellRow, and set the cell text
  cell.text = @"put your text here";

更新:如果您希望有人为您编写所有代码，您需要编辑您的帖子，使其更短、更清晰。只需解释一下您拥有哪些数据结构以及表格应该是什么样子，例如

DATA STRUCTURES 

-NSDictionary of section names as keys. 
-Each NSDictionary key points at an NSArray, which holds NSStrings that need to go in each row. 

DESIRED OUTPUT 

section 0 heading 
row 0 
row 1 

section 1 heading 
row 0 
row 1 

等等