How do I send an image from a UIViewController to a UITableViewCell

[lukeirvin]

I have developed a filtering system using UIPicker's to get specific images.

I want to send this image back to the previous UIViewController and the image will be placed in a UITableViewCell.

What would be the best method to approach this?

NSUserDefaults? Or maybe save the image to NSData?

If you've done this before or found a tutorial that is close to this please share!

Thanks!

[smithdale87]

Is your "previous" view controller the one that the picker is shown in. Specifically, is that view controller the picker's delegate?

[lukeirvin]

No.

The first UIViewController is a group table view. Each tableViewCell has a placeholder image.

When you tap a cell you will push to a new view that has the UIPicker (UIPickerDelegate and DataSource is in this UIViewController). Once the user filters down to the image they want they will tap a button to send them back to the previous View. I want the image they selected to now appear in that UITableViewCell.

[smithdale87]

There are a few ways to get the data back to the previous view controller (I'll call it viewController 1).

One way would be to:

- Add a property to your viewController2 that will be a reference to viewController1, when you create/show viewController2 from viewController1, be sure and set that property, probably just to "self"

- Add a method in your viewController1, called something like didSelectImage: (UIImage*)theImage. In your picker delegate method in viewController2 when the user picks an image, make a call to [self.viewController1 didSelectImage: theImage ].

- In the didSelectImage: method, you save the image in an array or somewhere that you can reference it by the indexPath of a tablecell. Then, you can call the reloadData method for the table cell.

- In your cellForRowAtIndexpath, you can lookup the new image that you just picked and put it in your cell.




Note: I realize there are some gaps in my little walkthrough. Hopefully, you can fill them in.


Edit:


Another way would be to make use of notifications.
- Setup viewController1 to listen for a specific notification, e.g. IDidSelectAnImageNotification
- Setup view controller2 to post the notification with the name above, and pass the selected along with it. This will happen in your picker delegate method.
- After you have the image in vc1, the rest will happen similar to above with the refresh the table view.

[lukeirvin]

This is what I am trying:

1st get the image based off filter

- (void)showImageFromFilter
{
    if ([brandTextField.text isEqualToString:@"Awake"] && [colorTextField.text isEqualToString:@"Purple"])    
    {        
        image = [UIImage imageNamed:@"awake_top_purple.png"];
        womenTopImageView = [[UIImageView alloc] initWithImage:image];
        
        womenTopImageView.contentMode = UIViewContentModeScaleAspectFit;
        
        womenTopImageView.frame = CGRectMake(60, 150, 190, 197);
        
        [self.view addSubview:womenTopImageView];
                
        [womenTopImageView release];
        [image release];
    }
}

2nd obtain imageview and set it to the image property

- (IBAction)imageSelectionTapped
{
    womenTopImageView.image = image;
    NSData * imageData;
    imageData = UIImagePNGRepresentation(image);
    [[NSUserDefaults standardUserDefaults] setObject:imageData forKey:[NSString stringWithFormat:@"%d",image]];
    
    [self dismissModalViewControllerAnimated:YES];
}

3rd display the image in a uitableviewcell

 if(indexPath.section == 1 && indexPath.row == 0)
        {
            if (cell.imageView.image == nil) 
            {
                cell.imageView.image = [UIImage imageNamed:@"placeholder.png"];
                cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
            }
            else
            {
                cell.imageView.image = womensTopImageView.image;
            }
}

The image is still not displaying in the UITableViewCell. I'm sure I'm not setting something correctly here. Can someone point out what I am missing.