Getting array of images in UIImageView (in UIPageViewController)

Question

I've started from the standard PageView-based application template provided by Apple. Now instead of text I want the pages in the app to display images. An array is created as follows:

 _pageData = [[NSArray alloc] initWithObjects:
                 [UIImage imageNamed:@"1.png"],
                 [UIImage imageNamed:@"2.png"],
                 [UIImage imageNamed:@"3.png"],
                 nil];

This array is handled the following way:

DataViewController *dataViewController = [storyboard instantiateViewControllerWithIdentifier:@"DataViewController"];
dataViewController.dataObject = [self.pageData objectAtIndex:index];
return dataViewController;

Then, in DataViewController.h:

@interface DataViewController : UIViewController

@property (strong, nonatomic) IBOutlet UIImageView *imageView;
@property (strong, nonatomic) UIImage *dataObject;

And in DataViewController.m I'm trying to display the images in de imageView in the following way:

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

    self.imageView = [[UIImageView alloc] initWithImage:_dataObject];

    NSLog(@"dataObject %@", _dataObject);

  }

However, with this code I'm not succeeding in getting the images onto the PageViewController. Any idea how I could get this working properly?

A big thanks for you help!

Answer 1

Here

self.imageView = [[UIImageView alloc] initWithImage:_dataObject];

you are creating a new UIImageView that is dangling arround unused, invisible and without a parent. You need to set it's size somehow and put it to a parent view with a

[<parent> addSubview:self.imageView]

to show it.

If your original UIImageView is read from a resource file ( I assume so because it is a IBOutlet ), just do a

self.imageView.image = _dataObject

and this should do the job instead.

Answer 2

This worked for me

 NSArray *anArray = [NSArray arrayWithObjects:
                        [UIImage imageNamed:@"transparente.png"],
                        [UIImage imageNamed:@"21001.jpg"],
                        [UIImage imageNamed:@"21002.jpg"],
                        [UIImage imageNamed:@"21003.jpg"],
                        [UIImage imageNamed:@"21004.jpg"],
                        [UIImage imageNamed:@"transparente2.png"],
                        nil];

    _pageData = [anArray copy];

and in the dataViewController

- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.pageImage.image = self.dataObject;
}

The pageImage is an UIImageView with an IBOutlet.