UIImageView added to an NSArray doesn't respond - objective-c

Question

I am fairly new to Objective-C, this is the first time I really don't know what to do.
I have a class - Parser - which creates UIImageViews, inits them with images and adds them to the UIView. The class also adds these UIImageViews to NSMutableArray - imgArray, which is a property of another class - Page.
Then, on the click of a button, I call the Page class from a Manager class, loop through the imgArray and try to set a new images for the UIImageViews in the array.
It doesn't work. Actually nothing I do to the UIImageViews doesn't work.
I try [img removeFromSuperView], [img setHidden:YES] and more. It doesn't response.
Here I declare the Array property in Page:
#property (nonatomic, retain) NSMutableArray *imgArray;
Here is the code from Parser where I create the image and add it to the array:
UIImageView *img = [[UIImageView alloc] initWithFrame: frame];
NSString *name = [c imageSource];
[img setImage: [UIImage imageFromBook: name]];
[view addSubview: img];
[c setImage:img];
if (!page.imgArray)
{
page.imgArray = [[NSMutableArray alloc] init];
}
[page.imgArray addObject:img];
[img release];
Here is the loop code from the Manager:
- (void) set3D:(bool)is3D
{
Page *page = [[DataManager data] currentPage];
int count = [page.imgArray count];
for (int i = 0; i < count; i++)
{
UIImageView *img = [page.imgArray objectAtIndex:i];
[img setImage:[UIImage imageNamed:image3DSource]];
}
}
Thanks in advance for any help!

Answer 1

There is no need to store the UIImageView's in an array.
When the UIImageView's are created, you can tag them with an arbitrary number, like.
#define K_MIN_IMGV 100
#define K_MAX_IMGV 120
- (void) setupViews
{
for (NSInteger count = K_MIN_IMGV; count < K_MAX_IMGV; ++count)
{
UIImageView *imgV = // create image view, set properties
imgV.tag = count; // tag the views for easy retrieval later
...
[mainView addSubview: imgV]; // add subviews
[imgV release], imgV = nil; // mainView now manages, release our allocation
}
}
// how to set new images
- (void) setupNewImages
{
for (NSInteger count = K_MIN_IMGV; count < K_MAX_IMGV; ++count)
{
UIImageView *imgV = (UIImageView *) [mainView viewWithTag: count]; // retrieve imageView
[imgV setImage: newImage]; // set new image
}
}
// To remove the imageView, you can use
UIImageView *imgV = (UIImageView *) [mainView viewWithTag: 123];
[imgV removeFromSuperview];

Answer 2

Have you tried to enumerate through the array using:
for(UIImageView* imageView in page.imgArray)
{
//Do code
}
This will tell you if there any imageViews in page.imgArray.
How are you adding objects to NSMutableArray and how are you initialising your NSMutableArray.
I remember having a problem adding objects to NSMutableArray but setting my init to solved this:
NSMutableArray* mutableArray = [NSMutableArray array];
Also what properties have you set on imgArray in page? Are you retaining the values?
Need to see more code to gain a fuller understanding.