iOS中的可扩展列表视图

概述我需要在我的iOS应用程序中创建可扩展的列表视图,即.如果你点击一个单元格,它应该扩展以提供更多的单元格.我正在关注此链接上给出的示例： Toggle showing/hiding child table cells iOS 此处给出了实现文件的代码： http://pastie.org/7756763 但是,在上面的示例中,数组是固定的.我有一个sqlite数据库,我存储任务和开始日期等等.我需 我需要在我的iOS应用程序中创建可扩展的列表视图,即.如果你点击一个单元格,它应该扩展以提供更多的单元格.我正在关注此链接上给出的示例： Toggle showing/hiding child table cells iOS
此处给出了实现文件的代码： http://pastie.org/7756763

但是,在上面的示例中,数组是固定的.我有一个sqlite数据库,我存储任务和开始日期等等.我需要创建一个可扩展的视图,其中不同的行是不同的开始日期,当我点击日期时,它应该给出该日期的任务.这是代码：

- (voID)vIEwDIDLoad{    [super vIEwDIDLoad];    allDates = [[NSMutableArray alloc]init];    self.date = [[NSMutableArray alloc] initWithObjects: nil];   // self.date = [[NSMutableArray alloc]init];    self.listofSections_DataSource = [[NSMutableArray alloc]initWithObjects:nil];    sqlite3_stmt *statement;    const char *dbpath = [mDatabasePath UTF8String];    if (sqlite3_open(dbpath,&mDiary)== sqlITE_OK) {        Nsstring *selectsql = [Nsstring stringWithFormat:@"SELECT * FROM Todo"];        const char *query_stmt = [selectsql UTF8String];        if (sqlite3_prepare_v2(mDiary,query_stmt,-1,&statement,NulL) == sqlITE_OK)        {                    while(sqlite3_step(statement) == sqlITE_ROW)            {                tempTaskname = [[Nsstring alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement,2)];                [allDates addobject:[[Nsstring alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement,0)]];                [self.date addobject:tempTaskname];            }    }    sqlite3_finalize(statement);}sqlite3_close(mDiary);NSLog(@"%i",[allDates count]);        for(int x = 0;x < [allDates count];x++)        {            if (sqlite3_open(dbpath,&mDiary)== sqlITE_OK) {                Nsstring *selectsql = [Nsstring stringWithFormat:@"SELECT * FROM Todo"];                const char *query_stmt = [selectsql UTF8String];                if (sqlite3_prepare_v2(mDiary,NulL) == sqlITE_OK){            temp = [[NSMutableArray alloc]init];            while(sqlite3_step(statement) == sqlITE_ROW)            {                tempTaskname = [[Nsstring alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement,2)];                NSLog(@"%@",tempTaskname);               // [allDates addobject:[[Nsstring alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement,0)]];                if([[[Nsstring alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement,0)] isEqualToString:allDates[x]])                {                    [self.temp addobject:tempTaskname];                }            }            NSLog(@"task name%@",temp);            [listofSections_DataSource addobject:temp];                } sqlite3_finalize(statement);            }            sqlite3_close(mDiary);        }    //[self.listofSections_DataSource addobject:allDates];   NSMutableArray *emptyArray = [[NSMutableArray alloc]init];   listofSections = [[NSMutableArray alloc]init];    for (int i = 0;i<[allDates count]; i++) {        [listofSections addobject:emptyArray];    }      self.selectedSection = -1;    self.selectedSectionTail = -1;}

表视图方法是：

- (NSInteger)numberOfSectionsIntableVIEw:(UItableVIEw *)tableVIEw {    return [listofSections_DataSource count];}-(NSInteger)tableVIEw:(UItableVIEw *)tableVIEw numberOfRowsInSection:(NSInteger)section {    if(selectedSection !=section)        return 1;    else{        NSArray *array = [listofSections objectAtIndex:section];        return [array count];    }}- (UItableVIEwCell *)tableVIEw:(UItableVIEw *)tableVIEw cellForRowAtIndexPath:(NSIndexPath *)indexPath {    static Nsstring *CellIDentifIEr = @"cell";    if(self.selectedSection == indexPath.section){//this is just to check to see if this section is the one we touched        UItableVIEwCell *cell =  [tableVIEw dequeueReusableCellWithIDentifIEr:CellIDentifIEr];        if (cell == nil)        {            cell = [[UItableVIEwCell alloc] initWithStyle:UItableVIEwCellStyleDefault reuseIDentifIEr:CellIDentifIEr];        }        NSArray *myArray = [listofSections_DataSource objectAtIndex:indexPath.section];//this Now contains your citIEs        Nsstring* myString = [myArray objectAtIndex:indexPath.row]; // get city for that row,under the state        cell.textLabel.text = myString;        return cell;    }    else{//THIS IS going to happen the first time        UItableVIEwCell *cell =  [tableVIEw dequeueReusableCellWithIDentifIEr:CellIDentifIEr];        if (cell == nil)        {            cell = [[UItableVIEwCell alloc] initWithStyle:UItableVIEwCellStyleDefault reuseIDentifIEr:CellIDentifIEr];        }            cell.textLabel.text = @"more";        return cell;    }}- (voID)tableVIEw:(UItableVIEw *)tableVIEw dIDSelectRowAtIndexPath:(NSIndexPath *)indexPath {    UItableVIEwCell * cell = [tableVIEw cellForRowAtIndexPath:indexPath];    //check to see if the cell is for exapnding or for selection    if([cell.textLabel.text isEqualToString:@"more"]){ // this means we need to expand        listofSections = [[NSMutableArray alloc]init];        //setting up the List of section with empty arrays        NSMutableArray *emptyArray = [[NSMutableArray alloc]init];        for (int i = 0;i<[allDates count]; i++) {            [listofSections addobject:emptyArray];        }        //Add array of tasks here        [listofSections replaceObjectAtIndex:indexPath.section withObject:[listofSections_DataSource objectAtIndex:indexPath.section]];        int tapedRow = [indexPath section];        self.selectedSection = tapedRow;        NSMutableIndexSet *myIndexSet = [[NSMutableIndexSet alloc]init];        [myIndexSet addindex:selectedSection];        [myIndexSet addindex:selectedSectionTail];        // Updating section in the tablevIEw        if(selectedSectionTail!=-1)            [tasktable reloadSections:(NSIndexSet*)myIndexSet withRowAnimation:UItableVIEwRowAnimationFade];        else {            [tasktable reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:             UItableVIEwRowAnimationFade];        }        //[tasktable reloadData];    }    else{    }    selectedSectionTail = selectedSection;}

这里的问题是：
1.屏幕上显示的部分数量是正确的,但是当轻敲第一个单元格时,它会消失.
2.当点击任何单元格时,列表不会扩展.

请有人帮帮我吗？谢谢..

解决方法 此示例可能是您要查找的内容： http://developer.apple.com/library/ios/#samplecode/TableViewUpdates/Introduction/Intro.html

样本来自静态数据,但您应该能够更新它以使用来自数据库的动态数据,并且还可以为日期等提供任务.

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