Creating a UITableView Programmatically

Question

I have an application in Xcode 4.6 which uses storyboards. I added a UITableView to a view controller class, which worked as expected. However, when I tried deleting the UITableView in the storyboard and adding it back into the same class programmatically, I ran into two specific problems:

1) Although I set the UITableViewCell type to be of type subtitle, the detail label no longer appears.

2) The segue that should occur when I select a cell does not occur, and prepare segue is not even being called, indicating that no message is being sent to the table view when a cell is selected.

Here is the relevant code:

@interface StatsTableViewController () <UITableViewDataSource, UITableViewDelegate> @property (strong, nonatomic) UITableView *tableView;  @end  @implementation StatsTableViewController  -(UITableView *)makeTableView {     CGFloat x = 0;     CGFloat y = 50;     CGFloat width = self.view.frame.size.width;     CGFloat height = self.view.frame.size.height - 50;     CGRect tableFrame = CGRectMake(x, y, width, height);      UITableView *tableView = [[UITableView alloc]initWithFrame:tableFrame style:UITableViewStylePlain];      tableView.rowHeight = 45;     tableView.sectionFooterHeight = 22;     tableView.sectionHeaderHeight = 22;     tableView.scrollEnabled = YES;     tableView.showsVerticalScrollIndicator = YES;     tableView.userInteractionEnabled = YES;     tableView.bounces = YES;      tableView.delegate = self;     tableView.dataSource = self;      return tableView; }  - (void)viewDidLoad {     [super viewDidLoad];     self.tableView = [self makeTableView];     [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"newFriendCell"];     [self.view addSubview:self.tableView]; }  - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {     static NSString *CellIdentifier = @"newFriendCell";     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];      if (cell == nil)      {         cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];     }      Friend *friend = [self.fetchedResultsController objectAtIndexPath:indexPath];       **//THIS DATA APPEARS**     cell.textLabel.text = friend.name;     cell.textLabel.font = [cell.textLabel.font fontWithSize:20];     cell.imageView.image = [UIImage imageNamed:@"icon57x57"];      **//THIS DATA DOES NOT APPEAR**     cell.detailTextLabel.text = [NSString stringWithFormat:@"%i Games", friend.gameCount];     cell.detailTextLabel.textColor = [UIColor lightGrayColor];      return cell; }   -(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {     [self performSegueWithIdentifier:@"detailsView" sender:self]; }  - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {       //I set the segue identifier in the interface builder      if ([segue.identifier isEqualToString:@"detailsView"])      {           NSLog(@"segue"); //check to see if method is called, it is NOT called upon cell touch           NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];          ///more code to prepare next view controller....      } } 

I am not sure what I am forgetting to do so that I can solve these two issues. Any help is appreciated.

Answer 1

When you register a class, and use dequeueReusableCellWithIdentifier:forIndexPath:, the dequeue method is guaranteed to return a cell, so your if (cell == nil) clause is never entered. So, just do it the old way, don't register the class, and use dequeueReusableCellWithIdentifier:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {     static NSString *CellIdentifier = @"newFriendCell";     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];      if (cell == nil) {         cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];     } //etc. return cell; } 

As for the segue, it can't be called because you can't make a segue to a table that you've created in code, not in IB. Again, go back to the old way and use tableView:didSelectRowAtIndexPath: which will be called when you select a cell. Instantiate your detail controller there and do the trasition in code.

After edit:

I didn't see your added code there. You've implemented didDeselectRowAtIndexPath rather than didSelectRowAtIndexPath. If you change that, your segue should work.