创建可扩展表iOS的问题 – Objective-C

我正在尝试创建一个可扩展的表视图，但是当我单击其中一个单元格时，我加载一个.xib文件来格式化子视图，但是当我再次单击该单元格时，.xib格式仍然存在并且与单元格的视图混淆。 有没有更好的方法来制作可扩展的表格视图？

码：

- (BOOL)tableView:(UITableView *)tableView canCollapseSection:(NSInteger)section { return YES; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // Return the number of sections. return 28; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { if ([self tableView:tableView canCollapseSection:section]) { if ([expandedSections containsIndex:section]) { return [ticketList count]; } return 1; // only top row showing } // Return the number of rows in the section. return 1; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 72; } 

在这里加载xib：

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"reuse"]; } // Configure the cell... NSLog(@"Number: %d", indexPath.section); NSArray *items = [[NSArray alloc] initWithObjects:@"Cleanliness", @"Door", @"Peek Hole", @"Sink", @"Towel Rack", @"Closet", @"Carpet", @"Wall", @"Bed", @"Matress", @"Mattress Cover", @"Fridge", @"Blinds", @"Window", @"Screen", @"Air Conditioning", @"Chair", @"Desk", @"Garbage bin", @"Shelves", @"Phone", @"Jacks", @"Lights", @"Smoke Detector", @"Heat Detector", @"Light bulb", @"Deep Cleaning", @"Final Prep", nil]; if (!indexPath.row) { // first row cell.textLabel.text = items[indexPath.section]; // only top row showing if ([expandedSections containsIndex:indexPath.section]) { } else { } } else { [self.tableView registerNib:[UINib nibWithNibName:@"HelpDeskCell" bundle:nil] forCellReuseIdentifier:@"Cell"]; static NSString *CellIdentifier = @"Cell"; HelpDeskCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if(cell == nil){ cell = [[HelpDeskCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } CGFloat fontsize = 16; if([[[ticketList objectAtIndex:indexPath.row] objectForKey:@"priority"] isEqualToString:@"Critical"]){ [cell.IDLabel setBackgroundColor:[UIColor colorWithRed:1 green:0.5 blue:0.5 alpha:1.0]]; } else{ [cell.IDLabel setBackgroundColor:[UIColor colorWithRed:0.925 green:0.925 blue:0.925 alpha:1.0]]; } [cell.IDLabel setFont:[UIFont boldSystemFontOfSize:fontsize]]; //reduce fontsize to 12 for the information labels //same on all devices and orientations fontsize = 12; //ticket status label [cell.statusLabel setFont:[UIFont boldSystemFontOfSize:fontsize]]; [cell.statusLabel setTextColor:[UIColor whiteColor]]; //ticket category label [cell.categoryLabel setBackgroundColor:[UIColor grayColor]]; [cell.categoryLabel setFont:[UIFont boldSystemFontOfSize:fontsize]]; [cell.categoryLabel setTextColor:[UIColor whiteColor]]; //ticket title label [cell.titleLabel setFont:[UIFont boldSystemFontOfSize:fontsize]]; [cell.titleLabel setTextColor:[UIColor blackColor]]; //Label holds the user that submitted the ticket [cell.submittedLabel setFont:[UIFont systemFontOfSize:fontsize]]; [cell.submittedLabel setTextColor:[UIColor blackColor]]; //Label holds the user currently working on the ticket [cell.handleLabel setFont:[UIFont systemFontOfSize:fontsize]]; [cell.handleLabel setTextColor:[UIColor blackColor]]; //ticket date label [cell.dateLabel setFont:[UIFont systemFontOfSize:fontsize]]; // Set the text of the subviews NSString * ticketIdStr = [[ticketList objectAtIndex:indexPath.row] objectForKey:@"ticket_id"]; [cell.IDLabel setText:ticketIdStr]; NSString * ticketStatusStr = [[ticketList objectAtIndex:indexPath.row] objectForKey:@"status"]; [cell.statusLabel setText:ticketStatusStr]; if([ticketStatusStr isEqualToString:@"Open"]) { [cell.statusLabel setBackgroundColor: [UIColor colorWithRed:0 green:0.6 blue:0.8 alpha:1.0]]; } else if ([ticketStatusStr isEqualToString:@"In Progress"]) { [cell.statusLabel setBackgroundColor: [UIColor colorWithRed:1.0 green:0.733 blue:0.2 alpha:1.0]]; } else if ([ticketStatusStr isEqualToString:@"Resolved"]) { [cell.statusLabel setBackgroundColor: [UIColor colorWithRed:0.6 green:0.8 blue:0 alpha:1.0]]; } else if ([ticketStatusStr isEqualToString:@"Closed"]) { [cell.statusLabel setBackgroundColor: [UIColor colorWithRed:0.8 green:0 blue:0 alpha:1.0]]; } NSString * categoryStr = [[ticketList objectAtIndex:indexPath.row] objectForKey:@"category"]; [cell.categoryLabel setText:categoryStr]; NSString * titleStr = [[ticketList objectAtIndex:indexPath.row] objectForKey:@"title"]; NSString * userIDStr = [[ticketList objectAtIndex:indexPath.row] objectForKey:@"user_id"]; NSString * handledByStr = [[ticketList objectAtIndex:indexPath.row] objectForKey:@"handled_by"]; [cell.titleLabel setText: [NSString stringWithFormat:@"Title: %@", titleStr]]; [cell.submittedLabel setText: [NSString stringWithFormat:@"Submitted By: %@", userIDStr]]; [cell.handleLabel setText: [NSString stringWithFormat:@"Handled By: %@", handledByStr]]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"yyyy-MM-dd"]; NSDate *orignalDate = [dateFormatter dateFromString:[[[ticketList objectAtIndex:indexPath.row] objectForKey:@"date_submitted"] substringToIndex:10]]; [dateFormatter setDateFormat:@"MMMM dd, yyyy"]; NSString * ticketDateStr = [dateFormatter stringFromDate:orignalDate]; [cell.dateLabel setText:ticketDateStr]; cell.selectionStyle = UITableViewCellSelectionStyleBlue; } return cell; } 

在此展开和折叠：

 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { if ([self tableView:tableView canCollapseSection:indexPath.section]) { if (!indexPath.row) { // only first row toggles exapand/collapse [tableView deselectRowAtIndexPath:indexPath animated:YES]; NSInteger section = indexPath.section; BOOL currentlyExpanded = [expandedSections containsIndex:section]; NSInteger rows; NSMutableArray *tmpArray = [NSMutableArray array]; if (currentlyExpanded) { rows = [self tableView:tableView numberOfRowsInSection:section]; [expandedSections removeIndex:section]; } else { [expandedSections addIndex:section]; rows = [self tableView:tableView numberOfRowsInSection:section]; } for (int i=1; i<rows; i++) { NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i inSection:section]; [tmpArray addObject:tmpIndexPath]; } UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath]; if (currentlyExpanded) { [tableView deleteRowsAtIndexPaths:tmpArray withRowAnimation:UITableViewRowAnimationTop]; } else { [tableView insertRowsAtIndexPaths:tmpArray withRowAnimation:UITableViewRowAnimationTop]; } } [self.tableView reloadData]; } } 

更新

主单元格是一个项目列表，扩展单元格被认为是来自sql数据库的票证。 我使用xib文件格式化票证

但是当我折叠包含项目的单元格时，此图像将保留并覆盖项目单元格

Answer 1

要在单击UITableViewCell时创建可扩展表视图，只需在现有UITableView中添加一个新单元格

[self.tableview insertRowsAtIndexPath：indexPath withRowAnimation：UITableViewRowAnimationAutomatic];