how to convert Array of UIImage to Array of base64 in swift 3 ?

Question

I have an array of images in my codes that are [UIImage] but I want to convert them to base64 - I couldn't ! - I found similar questions but when I used their answers I received Fatal Error

for i in  0...tinyViewController.imageUpload.count - 1 {
        print(i)


        let imageData = UIImageJPEGRepresentation(tinyViewController.imageUpload[i] , 1)

        let base64String = (imageData! as Data).base64EncodedString(options: NSData.Base64EncodingOptions(rawValue: 0))
        print(base64String)

}

fatal error: unexpectedly found nil while unwrapping an Optional value (lldb) — Saeed Rahmatolahi, Jul 29 '17 at 12:57

Aleksandr Honcharov · Accepted Answer · 2017-07-29T13:03:07.270

1

Try this function to convert each UIImage to base64 String. I used it in my project. It works perfect for me.

func base64(from image: UIImage) -> String? {
        let imageData = UIImagePNGRepresentation(image)
        if let imageString = imageData?.base64EncodedString(options: .endLineWithLineFeed) {
            return imageString
        }
        return nil
    }

So, do this:

for i in  0...tinyViewController.imageUpload.count - 1 {
        print(i)

        print(base64(from: tinyViewController.imageUpload[i]))

}

edited Jul 29 '17 at 13:03

answered Jul 29 '17 at 12:57

Aleksandr Honcharov

2,343
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30

this method will not execute because my images are in an array in a for loop and I should use them in this method but swift doesn't let me to use that ? – Saeed Rahmatolahi Jul 29 '17 at 13:00
I updated my answer. Insert my function and change your code as I wrote. – Aleksandr Honcharov Jul 29 '17 at 13:03
Again I received fatal error: unexpectedly found nil while unwrapping an Optional value (lldb) – Saeed Rahmatolahi Jul 29 '17 at 13:06
Maybe the error in another place of your code? There is no force unwrapping in my code. – Aleksandr Honcharov Jul 29 '17 at 13:08
where should be the function that you write ? before loop or after loop or inside that? – Saeed Rahmatolahi Jul 29 '17 at 13:09
It should be inside your class, but not inside the method where the loop is. – Aleksandr Honcharov Jul 29 '17 at 13:12
I used Break Point and this function will return nil - why? – Saeed Rahmatolahi Jul 29 '17 at 13:13
It can happen because of invalid images. – Aleksandr Honcharov Jul 29 '17 at 13:14
the images are the images that taken by the camera in device and saved to the camera roll – Saeed Rahmatolahi Jul 30 '17 at 03:58
Ok I found the answer in this link https://stackoverflow.com/questions/28846705/uiimagepngrepresentationuiimage-returns-nil/#answer-28846787 – Saeed Rahmatolahi Jul 30 '17 at 04:44

how to convert Array of UIImage to Array of base64 in swift 3 ?

1 Answers1