NSString edit via for loop - iOS

Question

I have a simple for loop which changes the images in a set of 9 UIImageViews. However, I have one problem, I can't change the name of the UIImageView in co-ordination of the for loop and so the end result is that the for loop ONLY affects 1 out of 9 UIImageViews I have in my iOS App.

Here is my code:

for (current_photo = 1; current_photo < 10; current_photo++) {
        picview_1.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@%i.png", SERVER_URL, current_photo]];
    }

You will notice that in my code there is a bit:

picview_1.image

When I replace the "pic view_1" which "picview_current_photo", it comes up with errors.

What am I doing wrong? Please explain.

Thanks for your time :)

Sergey Kalinichenko · Accepted Answer · 2013-07-26 16:05:29Z

2

Create an array of UIImageViews, and access them in a loop through an index, like this:

NSArray *imageViews = @[picview_1, picview_2, picview_3, picview_4, ..., picview_9];
// Arrays are indexed from zero, so I changed the index to run from 0 to 9
for (current_photo = 0; current_photo < 9; current_photo++) {
    // Since current_photo is zero-based, I added one to it in stringWithFormat
    UIImage *img = [UIImage imageNamed:[NSString stringWithFormat:@"%@%i.png", SERVER_URL, current_photo+1]];
    [[imageViews objectAtIndex:current_photo] setImage:img];
}

answered Jul 26, 2013 at 16:05

Sergey Kalinichenko

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1 Comment

Supertecnoboff Over a year ago

Thanks. Superb solution. And I'm still a beginner programmer so using an Array didn't come to mind.

skyzb · Accepted Answer · 2013-07-26 16:05:39Z

0

You are probably best to set up an array of UIImageViews. Then access the UIImageView that you need from that array and set the image as required.

answered Jul 26, 2013 at 16:05

skyzb

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