Data disappears from UITableView upon touch and release - ios

Question

UITableView data disappears on touch, as per screen shots below
The data loads correctly when the view is first loaded, like so.
On touching the screen and then releasing, the data disappears. (If I touch and hold, the data is still present.)
I set a breakpoint in the UITableView custom class and noticed that the methods within (such as cellForRowAtIndexPath:) are called when the view is loaded, but not after touch. The didSelectRowAtIndexPath: method is never called.
The code is very similar to the DateCell example. I'm trying to load a DatePicker (configured to show time only) when a cell is touched.
The relevant code is below, along with a screenshot of the IB delegate and datasource connections. Please let me know if you need any more info. I am new to iOS, so I would greatly appreciate as much detail of possible causes and solutions as possible.
#interface ScheduleTableViewController ()
#property (nonatomic, strong) NSArray *dataArray;
#property (nonatomic, strong) NSDateFormatter *timeFormatter;
#property (nonatomic, strong) NSIndexPath *timePickerIndexPath;
#property (assign) NSInteger pickerCellRowHeight;
#property (nonatomic, strong) IBOutlet UIDatePicker *pickerView;
#property (nonatomic, strong) IBOutlet UIBarButtonItem *doneButton; //to be used later for ios 6 compatability
#end
#implementation ScheduleTableViewController
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableDictionary *itemOne = [[#{ kPeriodKey : #" Tap a cell to change the survey time: " } mutableCopy ] autorelease];
NSMutableDictionary *itemTwo = [[#{ kPeriodKey : #"Morning Survey",
kTimeKey : [NSDate date] } mutableCopy] autorelease];
NSMutableDictionary *itemThree = [[#{ kPeriodKey : #"Evening Survey",
kTimeKey : [NSDate date] } mutableCopy] autorelease];
self.dataArray = #[itemOne, itemTwo, itemThree];
self.timeFormatter = [[[NSDateFormatter alloc] init] autorelease];
[self.timeFormatter setDateFormat:#"h:mm a"];
[self.timeFormatter setDateStyle:NSDateFormatterNoStyle];
[self.timeFormatter setTimeStyle:NSDateFormatterShortStyle];
UITableViewCell *pickerViewCellToCheck = [self.tableView dequeueReusableCellWithIdentifier:kTimePickerID];
self.pickerCellRowHeight = pickerViewCellToCheck.frame.size.height;
[self.tableView setDelegate:self];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
if (cell.reuseIdentifier == kDayPeriodAndTimeCellID) {
// todo check for ios < 7.0
[self displayInlineTimePickerForRowAtIndexPath:indexPath];
} else {
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = nil;
NSString *cellID = kDayPeriodAndTimeCellID;
if ([self indexPathHasPicker:indexPath]) {
cellID = kTimePickerID;
}
cell = [tableView dequeueReusableCellWithIdentifier:cellID forIndexPath:indexPath];
if (indexPath.row == 0) {
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
NSInteger modelRow = indexPath.row;
if (self.timePickerIndexPath != nil && self.timePickerIndexPath.row < indexPath.row) {
modelRow--;
}
NSDictionary *itemData = self.dataArray[modelRow];
if ([cellID isEqualToString:kDayPeriodAndTimeCellID]) {
cell.textLabel.text = [itemData valueForKey:kPeriodKey];
cell.detailTextLabel.text = [self.timeFormatter stringFromDate:[itemData valueForKey:kPeriodKey]];
}
return cell;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if ([self hasInlineTimePicker]) {
NSInteger numRows = self.dataArray.count;
return ++numRows;
}
return self.dataArray.count;
}
I am adding to an existing application, so all of the existing UI is implemented in XIB files, however this table is implemented in a storyboard. Here is a screen shot of the delegate and datasource outlet connections.

Answer 1

I think you need to provide a little more context here, but I have a guess. A UITableView needs a UITableViewDataSource to tell it what data should be in the cells. Do you hook that up in the XIB? If so, I don't see any of the methods implemented in your ScheduleTableViewController.
Make sure you implement that protocol and specifically the method "tableView:cellForRowAtIndexPath:". This is where you actually configure the cells that appear in the table view.
It sounds like you created the prototype table cells in InterfaceBuilder. For each prototype cell you created, make sure you set it's cell identifier in the properties inspector. Then use this cell identifier to identify which cell you are configuring in the call to "tableView:cellForRowAtIndexPath:".

Answer 2

Have you tried setting your table data with the functions
numberOfSectionsInTableView:tableView
tableView:tableView numberOfRowsInSection:section

Answer 3

I had the similar issue (in swift). It was solved by putting an instance variable to my tableViewManager responsible for presenting tableView. Initially an instance of it was created and called from button action method. So it was deallocated by ARC and consequently tableView had disappeared when I was trying to interact with it.
Inspired by: iOS TableViewController in PopOver disappears after touching tableview

Answer 4

In my case I was using SwipeMenuViewController (https://github.com/yysskk/SwipeMenuViewController)
and in each page there was a table view.
When I click the tabs it's switch the tables with no problem. but when I touched the table the data disappeared although
the table exists (I used background colours to check)
My solution was to hold a reference to the UIViewControllers return from the SwipeMenuViewController method:
func swipeMenuView(_ swipeMenuView: SwipeMenuView, viewControllerForPageAt index: Int) -> UIViewController {
viewControllers[index.description] = baseContactsTableViewController
return baseContactsTableViewController
}