Pass UIImage between ViewControllers

[s4lfish]

Hi,

I'm trying to pass an UIImage from one UIView in UITabBarController1 to another UIView in UINavigationController in UITabBarController2. In View1 i tried this:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo
{

    UploadModifyViewController *view2 = [self.storyboard instantiateViewControllerWithIdentifier:@"modify"];
    UITabBarController *navBar = [self.storyboard instantiateViewControllerWithIdentifier:@"navBar"];
    view2.imageView.image = image;                //<-----
    [self dismissModalViewControllerAnimated:NO];
    [self presentModalViewController:navBar animated:YES];
}

Remember, view2 is in a NavigationController, and NavigationController is in a TabBarController. Extern Variable doesn't work, because these can't be used with UI Elements.

I also tried to declare an UIImage in the UploadModifyViewController.h and store the image with view2.image = storedImage; and then in the viewDidLoad of view2 i tried to set self.imageView = storedImage but this also didn't work.

Somehow the stored image gets lost when view2 gets initialized by its NavigationController.

Greetz
s4lfish

[jmktayag]

Originally Posted by s4lfish

Hi,

I'm trying to pass an UIImage from one UIView in UITabBarController1 to another UIView in UINavigationController in UITabBarController2. In View1 i tried this:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo
{

    UploadModifyViewController *view2 = [self.storyboard instantiateViewControllerWithIdentifier:@"modify"];
    UITabBarController *navBar = [self.storyboard instantiateViewControllerWithIdentifier:@"navBar"];
    view2.imageView.image = image;                //<-----
    [self dismissModalViewControllerAnimated:NO];
    [self presentModalViewController:navBar animated:YES];
}

Remember, view2 is in a NavigationController, and NavigationController is in a TabBarController. Extern Variable doesn't work, because these can't be used with UI Elements.

I also tried to declare an UIImage in the UploadModifyViewController.h and store the image with view2.image = storedImage; and then in the viewDidLoad of view2 i tried to set self.imageView = storedImage but this also didn't work.

Somehow the stored image gets lost when view2 gets initialized by its NavigationController.

Greetz
s4lfish

Instead of passing it to the property of imageView try to create a UIImage variable and pass the image to the UIImage that you have declared and instantiate it with your imageView.

[Domele]

You should never mess with a view controller's view. A reason for that is you don't know if its view is created yet. jmktayag's solution is perfect.

[s4lfish]

Thank you for your answers.

But can u give me a hint how this would look like? I'm new to iOS development
I declare an UIImage in ... the UploadModifyViewController?
And in the viewDidLoad i try self.imageView instatiateWithImage:image ?

Greetz

S4lfish

[jmktayag]

Originally Posted by s4lfish

Thank you for your answers.

But can u give me a hint how this would look like? I'm new to iOS development
I declare an UIImage in ... the UploadModifyViewController?
And in the viewDidLoad i try self.imageView instatiateWithImage:image ?

Greetz

S4lfish

After passing the image from the previous controller to your UploadModifyViewController you can use self.imageView.image = myImage.
Your UIImage declaration must be synthesized.

[s4lfish]

Mhh, i think i already tried this.
Perhaps i screwed something in the Storyboard up ...
i post a screenshot that u can see what I'm trying to do:



1, Class: UploadViewController
When u choose an image from the library, the image should be shown in the imageView of 4.
In this controller:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(GEOImage *)image editingInfo:(NSDictionary *)editingInfo
{
    
    
    UploadTabBar *tabBar = [self.storyboard instantiateViewControllerWithIdentifier:@"tabBar"];
    UploadModifyViewController *modifyView = [self.storyboard instantiateViewControllerWithIdentifier:@"modify"];
    modifyView.chosenImage = image;
    
    [self dismissModalViewControllerAnimated:NO];
    [self presentModalViewController:tabBar animated:YES];

2, Class: UploadTabBarController (only exists because i tried almost everywhere to store the image^^)
Here i'd like to store the Image, because i want to add some image description, GPS tag and so on in the other 2 Tabs of TabBarController, and gather all information in the TabBarController.

3, Class: UploadNavBarController (same here as 2)

4, Class: UploadModifyViewController
in the .h :

UIImage *chosenImage;
              UIImageView *imageView;
@property (nonatomic, retain) UIImage *chosenImage
@property (nonatomic, retain) IBOutlet UIImageView *imageView;

In the viewDidLoad: self.imageView.image = chosenImage;

[jmktayag]

Originally Posted by s4lfish

Mhh, i think i already tried this.
Perhaps i screwed something in the Storyboard up ...
i post a screenshot that u can see what I'm trying to do:



1, Class: UploadViewController
When u choose an image from the library, the image should be shown in the imageView of 4.
In this controller:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(GEOImage *)image editingInfo:(NSDictionary *)editingInfo
{
    
    
    UploadTabBar *tabBar = [self.storyboard instantiateViewControllerWithIdentifier:@"tabBar"];
    UploadModifyViewController *modifyView = [self.storyboard instantiateViewControllerWithIdentifier:@"modify"];
    modifyView.chosenImage = image;
    
    [self dismissModalViewControllerAnimated:NO];
    [self presentModalViewController:tabBar animated:YES];

2, Class: UploadTabBarController (only exists because i tried almost everywhere to store the image^^)
Here i'd like to store the Image, because i want to add some image description, GPS tag and so on in the other 2 Tabs of TabBarController, and gather all information in the TabBarController.

3, Class: UploadNavBarController (same here as 2)

4, Class: UploadModifyViewController
in the .h :

UIImage *chosenImage;
              UIImageView *imageView;
@property (nonatomic, retain) UIImage *chosenImage
@property (nonatomic, retain) IBOutlet UIImageView *imageView;

In the viewDidLoad: self.imageView.image = chosenImage;

I'm not quite still familiar with the storyboard thing. Can you check if the UploadModifyViewController is properly initialize? You could use NSLog to show if the controller's state.

[s4lfish]

Mhh, how can i view the Controller states?

I already tried to store the image in the AppDelegate as UIImage
with properties:

@property (nonatomic, copy) UIImage *chosenImage;

and then in the Upload Class:

AppDelegate *appD = (AppDelegate *) [[UIApplication sharedApplication] delegate];
appD.chosenImage = image;

I am doing it wrong? Because when i try to load in the ModifyViewController's viewDidLoad{} with

AppDelegate *appD = (AppDelegate *) [[UIApplication sharedApplication] delegate];
    self.imageView.image = appD.chosenImage;

...it still doesn't work.

[Jessica1988]

The man has great knowledge

[s4lfish]

No one has an idea? And please no senseless posts like the one above ...

Tried to figure out when and how the controllers initialize or instantiate the view, but got no solution yet

[jmktayag]

Originally Posted by s4lfish

No one has an idea? And please no senseless posts like the one above ...

Tried to figure out when and how the controllers initialize or instantiate the view, but got no solution yet

Instead of copy could you try retain?