UIImageView not showing image!

[TranT]

Hey! I have TableView with several cells and when I click on one it goes to a simple View with only a UIImageView on it. The problem is that on the first click the image on the View doesn't show up only in the next clicks.

Code:

@interface ImageViewerViewController : UIViewController {
	IBOutlet UIImageView *imageView;
}

@property (nonatomic,retain) UIImageView *imageView;

@end





- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    // Navigation logic may go here. Create and push another view controller.
	
	if(childViewerController==nil)
		childViewerController= [[ImageViewerViewController alloc] initWithNibName:@"ImageViewer" bundle:nil];
	
	UIImage *image = [UIImage imageNamed:@"images.jpg"];
	childViewerController.imageView.image=image;

	WebMedicalImageViewerAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
	[delegate.navController pushViewController:childViewerController animated:YES];
}

Image showing UI:
example.png - ImageHost.org

Any idea why ?

[moezzz]

Originally Posted by TranT

Hey! I have TableView with several cells and when I click on one it goes to a simple View with only a UIImageView on it. The problem is that on the first click the image on the View doesn't show up only in the next clicks.

Code:

@interface ImageViewerViewController : UIViewController {
	IBOutlet UIImageView *imageView;
}

@property (nonatomic,retain) UIImageView *imageView;

@end





- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    // Navigation logic may go here. Create and push another view controller.
	
	if(childViewerController==nil)
		childViewerController= [[ImageViewerViewController alloc] initWithNibName:@"ImageViewer" bundle:nil];
	
	UIImage *image = [UIImage imageNamed:@"images.jpg"];
	childViewerController.imageView.image=image;

	WebMedicalImageViewerAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
	[delegate.navController pushViewController:childViewerController animated:YES];
}

Image showing UI:
example.png - ImageHost.org

Any idea why ?

try to use .png file where possible...

[tychop]

Can you be more specific?
Does the tableview>view animation show up on a second click?
Is the image just not showing or is the view not pushed on the stack?
When you debug & stop just before the push on the navController, is you controller valid? Is the image valid?

First guess: I think the 'imageNamed' method generates cached images. You might want to alloc init an image (don't forget to release). Maybe that's your problem.

[TranT]

The table is working fine but when i click one of the cells for the first time the image on the View that shows up doesn't appear. I go back with the nav button to the table again, click another cell and voilà it shows the image on the View.

I tried to alloc the image ( and release it but when i did the release the app would crash :s ) and I have the same problem.

	NSString *myImagePath = [[[NSBundle mainBundle] resourcePath]  stringByAppendingPathComponent:@"images.jpg"];
	UIImage *image = [[UIImage alloc] initWithContentsOfFile:myImagePath];

[rc20rd]

Hi,
do your problem solve?
if solved, please tell me
thank you

[substance21]

This is most likely due to imageView being nil when you are setting it for the first time. This is because alloc/init on a viewController doesn't load the view; it gets loaded when the view is about to be displayed.

You can either explicitly load the view using the loadView method (not really sure if this has side effects), or set some other retained UIImage property in the controller, and in the viewDidLoad method of your view controller, set the imageView from that.

[rc20rd]

Originally Posted by moezzz

try to use .png file where possible...

Hi ,buddy
try this :
- (void)tableViewUITableView *)tableView didSelectRowAtIndexPathNSIndexPath *)indexPath {
// Navigation logic may go here. Create and push another view controller.

if(childViewerController==nil)
childViewerController= [[ImageViewerViewController alloc] initWithNibName:@"ImageViewer" bundle:nil];

WebMedicalImageViewerAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
[delegate.navController pushViewController:childViewerController animated:YES];

UIImage *image = [UIImage imageNamed:@"images.jpg"];
childViewerController.imageView.image=image;
}