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POexpandable list view in iOS
 

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    <p>I need to create expandable list view in my iOS app, ie. if you tap on a cell, it should expand to give more cells. I'm following the example given on this link: <a href="https://stackoverflow.com/questions/13074713/toggle-showing-hiding-child-table-cells-ios">Toggle showing/hiding child table cells iOS</a> The code for the implementation file is given here too: <a href="http://pastie.org/7756763" rel="nofollow noreferrer">http://pastie.org/7756763</a></p> <p>However, in the example above the arrays are fixed. I have a sqlite database where I store tasks and their start dates, among other things. I need to create an expandable view where the different rows are the different start dates and when I tap on a date, it should give the tasks for that date. Here's the code:</p> <pre><code>- (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,&amp;mDiary)== SQLITE_OK) { NSString *selectSQL = [NSString stringWithFormat:@"SELECT * FROM TODO"]; const char *query_stmt = [selectSQL UTF8String]; if (sqlite3_prepare_v2(mDiary, query_stmt, -1, &amp;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 &lt; [allDates count];x++) { if (sqlite3_open(dbpath,&amp;mDiary)== SQLITE_OK) { NSString *selectSQL = [NSString stringWithFormat:@"SELECT * FROM TODO"]; const char *query_stmt = [selectSQL UTF8String]; if (sqlite3_prepare_v2(mDiary, query_stmt, -1, &amp;statement, 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&lt;[allDates count]; i++) { [listOfSections addObject:emptyArray]; } self.selectedSection = -1; self.selectedSectionTail = -1; } </code></pre> <p>the table view methods are:</p> <pre><code>- (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&lt;[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; } </code></pre> <p>The problem here is that: 1. No. of sections that shows on screen is correct but when the first cell is tapped, it disappears. 2. the list doesn't get expanded when any of the cells is tapped.</p> <p>Please can anyone help me out? Thanks..</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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