Master Detail Application - Static Table in Detail View - iphone

Question

I'm trying to code an app in Xcode 4, with storyboarding. It's a master detail application, and it all worked fine, with the table and the detail view. But in my detail view, I would like to have a static table to display the data. In a grouped table style way, with the "key" on the left and "value" on the right, if that's a way to put it... So, it's all working fine until I put a table into my UIView. Apparently you have to put it in a UITableView for it to work, so I deleted the UIView that Xcode made for me and put in a UITableView in its place. I set it up EXACTLY the same (I think) with the identifier, title etc... and then connect the table cells up with outlets and what not. But now when I enter the view, I just get an empty table (well, not empty, just all the rows say "Detail" in rather than the actual data I want). I don't see why! D: I even changed DetailViewController.h to say "UITableViewController" as well! No avail... :( Could someone please enlighten me as to what I'm doing wrong! I bet it's really simple... :L Here's my code
MasterViewController.h
#import <UIKit/UIKit.h>
#class DetailViewController;
#interface MasterViewController : UITableViewController
#property (strong, nonatomic) DetailViewController *detailViewController;
#property (strong) NSMutableArray *verbs;
#end
MasterViewController.m
#import "MasterViewController.h"
#import "DetailViewController.h"
#import "VerbData.h"
#interface MasterViewController () {
NSMutableArray *_objects;
}
#end
#implementation MasterViewController
#synthesize verbs = _verbs;
- (void)awakeFromNib
{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
self.clearsSelectionOnViewWillAppear = NO;
self.contentSizeForViewInPopover = CGSizeMake(320.0, 600.0);
}
[super awakeFromNib];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.detailViewController = (DetailViewController *) [[self.splitViewController.viewControllers lastObject] topViewController];
self.title = #"Verbs";
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
- (void)insertNewObject:(id)sender
{
if (!_objects) {
_objects = [[NSMutableArray alloc] init];
}
[_objects insertObject:[NSDate date] atIndex:0];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return _verbs.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"VerbCell"];
VerbData *verb = [self.verbs objectAtIndex:indexPath.row];
cell.textLabel.text = verb.infinitive;
cell.detailTextLabel.text = verb.english;
return cell;
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
[_objects removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
}
}
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
VerbData *object = [self.verbs objectAtIndex:indexPath.row];
self.detailViewController.detailItem = object;
}
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"showDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
VerbData *object = [self.verbs objectAtIndex:indexPath.row];
[[segue destinationViewController] setDetailItem:object];
}
}
#end
DetailViewController.h
#import <UIKit/UIKit.h>
#import "VerbData.h"
#interface DetailViewController : UITableViewController <UISplitViewControllerDelegate>
#property (strong, nonatomic) VerbData *detailItem;
#property (weak, nonatomic) IBOutlet UILabel *detailDescriptionLabel;
#property (weak, nonatomic) IBOutlet UILabel *jeOutlet;
#property (weak, nonatomic) IBOutlet UILabel *tuOutlet;
#property (weak, nonatomic) IBOutlet UILabel *ilOutlet;
#property (weak, nonatomic) IBOutlet UILabel *nousOutlet;
#property (weak, nonatomic) IBOutlet UILabel *vousOutlet;
#property (weak, nonatomic) IBOutlet UILabel *ilsOutlet;
#end
DetailViewController.m
#import "DetailViewController.h"
#interface DetailViewController ()
#property (strong, nonatomic) UIPopoverController *masterPopoverController;
- (void)configureView;
#end
#implementation DetailViewController
#pragma mark - Managing the detail item
#synthesize detailItem = _detailItem;
#synthesize jeOutlet = _jeOutlet;
#synthesize tuOutlet = _tuOutlet;
#synthesize ilOutlet = _ilOutlet;
#synthesize nousOutlet = _nousOutlet;
#synthesize vousOutlet = _vousOutlet;
#synthesize ilsOutlet = _ilsOutlet;
- (void)setDetailItem:(id)newDetailItem
{
if (_detailItem != newDetailItem) {
_detailItem = newDetailItem;
// Update the view.
[self configureView];
}
if (self.masterPopoverController != nil) {
[self.masterPopoverController dismissPopoverAnimated:YES];
}
}
- (void)configureView
{
// Update the user interface for the detail item.
if (self.detailItem) {
self.detailDescriptionLabel.text = self.detailItem.english;
self.jeOutlet.text = self.detailItem.je;
self.tuOutlet.text = self.detailItem.tu;
self.ilOutlet.text = self.detailItem.il;
self.nousOutlet.text = self.detailItem.nous;
self.vousOutlet.text = self.detailItem.vous;
self.ilsOutlet.text = self.detailItem.ils;
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.title = self.detailItem.infinitive;
[self configureView];
}
- (void)viewDidUnload
{
[self setJeOutlet:nil];
[self setTuOutlet:nil];
[self setIlOutlet:nil];
[self setNousOutlet:nil];
[self setVousOutlet:nil];
[self setIlsOutlet:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
} else {
return YES;
}
}
#pragma mark - Split view
- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController
{
barButtonItem.title = NSLocalizedString(#"Master", #"Master");
[self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];
self.masterPopoverController = popoverController;
}
- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
// Called when the view is shown again in the split view, invalidating the button and popover controller.
[self.navigationItem setLeftBarButtonItem:nil animated:YES];
self.masterPopoverController = nil;
}
#end

Answer 1

First thing I will try to debug is -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath method. Is it return values? Try to put NSLog in this method and check it.
Or maybe this will help you:
Note: If you want to change the background color of a cell (by setting the background color of a cell via the backgroundColor property declared by UIView) you must do it in the tableView:willDisplayCell:forRowAtIndexPath: method of the delegate and not in tableView:cellForRowAtIndexPath: of the data source. Changes to the background colors of cells in a group-style table view has an effect in iOS 3.0 that is different than previous versions of the operating system. It now affects the area inside the rounded rectangle instead of the area outside of it.

Answer 2

The code must handle the case where dequeueReusableCellWithIdentifier answers nil...
static NSString *CellIdentifier = #"VerbCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}