Help using one XIB for displaying Images

lukeirvin · May 2012

Right now I have multiple buttons set up, each are set to custom with an image.

Once the button is tapped I open a new ViewController to display the image.

I want to only use one ViewController/XIB for the images since it would be a headache to replicate this over and over and over again.

What would be the best method to implement this?

I think the difficult part is because I am using multiple buttons.

Should I set up one button and just scroll through my images and code it to know that when this image is on the button display it in the new XIB?

Or can I still set this up using the multiple buttons?

Any help is appreciated.

Duncan C · May 2012

lukeirvin;429603 said:
Right now I have multiple buttons set up, each are set to custom with an image.

Once the button is tapped I open a new ViewController to display the image.

I want to only use one ViewController/XIB for the images since it would be a headache to replicate this over and over and over again.

What would be the best method to implement this?

I think the difficult part is because I am using multiple buttons.

Should I set up one button and just scroll through my images and code it to know that when this image is on the button display it in the new XIB?

Or can I still set this up using the multiple buttons?

Any help is appreciated.

UIView objects have a property call tag. It's an integer.

Set up each button with a different, non-zero tag number.

Have each button invoke the same action.

In that action, check the tag number of the button, and use that to look up the image.

Add a UIImage property to your second view controller.

In the button action, look up the image using the tag number (from an array of images perhaps, or an array of filenames to images.) Set the image property in the second view controller and invoke it.

lukeirvin · May 2012

What would be the best method to check the tag number?

Using a for loop?

lukeirvin · May 2012

I have set up an NSMutableArray with the image files. I have also set a UIImage property in my Second View Controller.

I am trying this:

viewDidLoad:


     imageArray = [[NSMutableArray alloc] initWithObjects:@\"image1.png\", @\"image2.png\", @\"image3.png\", nil];

In my Button Action:


    NSInteger tag;
    tag = [sender tag];
    
    if (tag == 0) {
        return;
    }
    else {
        NSString * imageName = [self.imageArray objectAtIndex:tag - 1];
    
        topImageView.image = [UIImage imageNamed:imageName];
    }

In my Second View Controller I have this:


     topImageView.image = image;

My image is still not getting set though.

Thoughts?

lukeirvin · May 2012

I changed to this in my main ViewController:


        NSString * imageName = [self.imageArray objectAtIndex:tag - 1];
        image = [UIImage imageNamed:imageName];
        topImageView.image = image;

I'm able to pick up the image now. But I am still not getting it in my Second View Controller.

Thoughts?

I have properties set for both the UIImage and UIImageView

lukeirvin · May 2012

Figured it out. Super simple mistake...

I needed to set my secondViewControler.image = image

Thanks for the help earlier Duncan :)

Duncan C · May 2012

lukeirvin;430031 said:
I changed to this in my main ViewController:
        NSString * imageName = [self.imageArray objectAtIndex:tag - 1];
        image = [UIImage imageNamed:imageName];
        topImageView.image = image;
I'm able to pick up the image now. But I am still not getting it in my Second View Controller.

Thoughts?

I have properties set for both the UIImage and UIImageView

Don't try to change another view controller's views directly. There are lots of reasons why that's bad. This is one... it doesn't work sometimes. Even in cases where it does work, it's bad design.

Create an image property in the second view controller, and set that.

Then, in your second view controller's viewWillAppear method, set the image view's image to the view controller's image property.

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Help using one XIB for displaying Images

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