Having trouble passing NNString label name from MasterView to DetailView - ios

Question

I'm trying to make a Master-Detail app that displays a list of Sounds on the master view. When you tap the sound, you go to the detail screen, and it displays the Sound you chose as a label, then shows a short movie of the sound. My problem is, all the sounds show as the label the name of the first sound in the list. When I tap on Sound B, the detail screen shows "Sound B." When I tap on tSound F, the detail screen shows "Sound B."
No errors or warnings come up. Any ideas?
Thanks in advance.
slfViewController.h
#import <UIKit/UIKit.h>
#interface slfViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>
#property (nonatomic, strong) IBOutlet UITableView *tableView;
#end
slfViewController.m
#import "slfViewController.h"
#import "slfSoundDetailViewController.h"
#interface slfViewController ()
#end
#implementation slfViewController
{
NSArray *tableData;
NSArray *thumbnails;
}
#synthesize tableView = _tableView;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
tableData = [NSArray arrayWithObjects:
#"B Sound",
#"Ch Sound",
#"D Sound",
#"F Sound",
...
#"Zh Sound",
nil];
thumbnails = [NSArray arrayWithObjects:
#"b.jpg",
#"ch.jpg",
#"d.jpg",
#"f.jpg",
...
#"zh.jpg",
nil];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"showSoundDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
slfSoundDetailViewController *destViewController = segue.destinationViewController;
destViewController.soundName = [tableData objectAtIndex:indexPath.row];
}
}
#pragma mark - TableView Data Source methods
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [tableData count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"soundCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
cell.textLabel.text = [tableData objectAtIndex:indexPath.row];
cell.imageView.image = [UIImage imageNamed:[thumbnails objectAtIndex:indexPath.row]];
return cell;
}
#end
slfSoundDetailViewController.h
#import <UIKit/UIKit.h>
#interface slfSoundDetailViewController : UIViewController
#property (nonatomic, strong) IBOutlet UILabel *soundLabel;
#property (nonatomic, strong) NSString *soundName;
#end
slfSoundDetailViewController.m
#import "slfSoundDetailViewController.h"
#interface slfSoundDetailViewController ()
#end
#implementation slfSoundDetailViewController
#synthesize soundLabel;
#synthesize soundName;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
soundLabel.text = soundName;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end

Answer 1

You’re only setting soundLabel.text = soundName in viewDidLoad… so it’s only being called once (when the view controller’s view is first loaded). This app is most likely reusing the same instance of slfSoundDetailViewController so it doesn’t reload its view.
You’ll probably want to override either -[slfSoundDetailViewController setSoundName:] or -[slfSoundDetailViewController viewWillAppea:] and set soundLabel.text there.