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POUITableView: hide header from empty section
 

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    <p>i have a UITableView, that displays expenses from a current month (see screenshot):</p> <p>My problem is with the header for empty sections. is there any way to hide them? The data is loaded from coredata.</p> <p>this is the code that generates the header title:</p> <p>TitleForHeader</p> <pre><code>-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section{ if ([tableView.dataSource tableView:tableView numberOfRowsInSection:section] == 0) { return nil; } else { NSDate *today = [NSDate date ]; int todayInt = [dataHandler getDayNumber:today].intValue; NSDate *date = [NSDate dateWithTimeIntervalSinceNow:(-(todayInt-section-1)*60*60*24)]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:[[NSLocale preferredLanguages] objectAtIndex:0]]]; [dateFormatter setTimeStyle:NSDateFormatterNoStyle]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; NSString *formattedDateString = [dateFormatter stringFromDate:date]; return formattedDateString;} } </code></pre> <p>ViewForHeader</p> <pre><code>-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{ if ([tableView.dataSource tableView:tableView numberOfRowsInSection:section] == 0) { return nil; } else { UIView *headerView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 312, 30)]; UILabel *title = [[UILabel alloc]initWithFrame:CGRectMake(4, 9, 312, 20)]; UIView *top = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 312, 5)]; UIView *bottom = [[UIView alloc]initWithFrame:CGRectMake(0, 5, 312, 1)]; [top setBackgroundColor:[UIColor lightGrayColor]]; [bottom setBackgroundColor:[UIColor lightGrayColor]]; [title setText:[expenseTable.dataSource tableView:tableView titleForHeaderInSection:section]]; [title setTextColor:[UIColor darkGrayColor]]; UIFont *fontName = [UIFont fontWithName:@"Cochin-Bold" size:15.0]; [title setFont:fontName]; [headerView addSubview:title]; [headerView addSubview:top]; [headerView addSubview:bottom]; return headerView; } } </code></pre> <p>heightForHeader</p> <pre><code>- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section { NSLog(@"Height: %d",[tableView.dataSource tableView:tableView numberOfRowsInSection:section] == 0); if ([tableView.dataSource tableView:tableView numberOfRowsInSection:section == 0]) { return 0; } else { return 30; } } </code></pre> <p>numberOfRowsInSection</p> <pre><code>- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { int rows = 0; for (Expense* exp in [dataHandler allMonthExpenses]) { if ([exp day].intValue == section) { rows++; } } return rows; } </code></pre> <p><img src="https://i.stack.imgur.com/srwoS.png" alt="enter image description here"> sebastian</p>
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Guidance
A row detail

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.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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