Question

(In XCode 4 with Storyboards, app for iPhone)

My DetailView: a UIView filled with Labels and ImageViews to display details recieved through a segue when a cell was selected in the MainTableViewController. Now I’ve added a UIScrollView on this UIView because I want the Labels and ImageViews to be diplayed in a scroll view instead.

The only thing visible in DetailViewController now when I run the app, is a blank ScrollView. None of the content I’ve passed from the TableView is displayed, it’s not getting the selectedObject. How can I display my content and be able to swipe through the cells with swipeDetectedLeft now after the UIScrollView was added? I would be happy if you could make example with my code.

DetailViewController.h:

@interface DetailViewController : UIViewController {
    IBOutlet UIScrollView *viewScroller; 
    //Added a ScrollView..
    }

@property (strong, nonatomic) NSArray *detailsDataSource; 
//Recieved from the TableView to know the order of the sorted TableView cells, cells populated with a mutable array from a plist of dictionaries)

@property int detailIndex; 
//To know which cell selected (for swiping throug cells)

@property (nonatomic, strong) NSString *selectedObject; 
//Content of selected cell from tableview (for swiping through cells)

@property (nonatomic, strong) IBOutlet UILabel *aLabel; 
@property (nonatomic, strong) IBOutlet UIImageView *anImageView; 
//to display content

DetailViewController.m:

#import "DetailViewController.h"

@interface DetailViewController ()

@end

@implementation DetailViewController

@synthesize aLabel,anImageView;
@synthesize selectedObject;

@synthesize detailsDataSource, detailIndex;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}


- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}

- (void)viewDidLoad
{
[super viewDidLoad];

[viewScroller setScrollEnabled:YES];
[viewScroller setContentSize:CGSizeMake(320, 700)];

//A customized Label for NavigationBar    
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 480, 44)];
label.backgroundColor = [UIColor clearColor];
label.numberOfLines = 2;
label.font = [UIFont boldSystemFontOfSize: 14.0f];
label.shadowColor = [UIColor colorWithWhite:0.0 alpha:0.5];
label.textAlignment = UITextAlignmentCenter;
label.textColor = [UIColor whiteColor];
label.text = [selectedObject valueForKey:@"Name"];
self.navigationItem.titleView = label;
[label release];


aLabel.text = [selectedObject valueForKey:@"A Label"];
anImageView.image = [UIImage imageNamed:[selectedWine valueForKey:@"An Image"]];

self.navigationController.navigationBar.translucent = YES;
self.wantsFullScreenLayout = YES;

UISwipeGestureRecognizer *leftGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeDetectedLeft:)];
leftGesture.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:leftGesture];
}

- (void)swipeDetectedLeft:(UISwipeGestureRecognizer *)sender
{
if (detailIndex != [detailsDataSource count])
    detailIndex++;

aLabel.text = [[detailsDataSource objectAtIndex: detailIndex] valueForKey:@"A Label"];
//Here follows ImageView and NavigationbBar Label for the swipe..
}

EDIT:

If I set aLabel.text = @”Test” then it works. So the UIScrollView isn’t getting the selectedObject from:

MainTableViewController.m:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {


if ([[segue identifier] isEqualToString:@"DetailSegue"]) {

    NSIndexPath *selectedRowIndex = [self.tableView indexPathForSelectedRow];
    DetailViewController *detailViewController = [segue destinationViewController];

    detailViewController.selectedObject = [sortedObjects objectAtIndex:selectedRowIndex.row];

    detailViewController.detailsDataSource = [[NSArray alloc]initWithArray:sortedObjects];
    detailViewController.detailIndex = selectedRowIndex.row;
}
}

Answer 1

Actually the answer was very simple: I just had to remove the UIView from the scene in the storyboard and place the UIScrollView directly onto the DetailViewController scene instead.