I am trying to center crop a

UIImage

in iOS and convert the cropped version to a

ByteArray

to send through HTTP, is this correct?

val croppedUIImage = bitmap.image.CGImage?.let { cgImage ->
    val width = CGImageGetWidth(cgImage).toDouble()
    val height = CGImageGetHeight(cgImage).toDouble()

    val squareSize = minOf(width, height)
    val x = (width - squareSize) / 2
    val y = (height - squareSize) / 2

    val rect = CGRectMake(x, y, squareSize, squareSize)

    UIImage(CGImageCreateWithImageInRect(image = cgImage, rect = rect))
} ?: throw NullPointerException("Null CGImage")

val nsData = UIImagePNGRepresentation(croppedUIImage)
    ?: throw CharacterCodingException("Can't represent UIImage as PNG")

return ByteArray(nsData.length.toInt()).apply {
    usePinned {
        memcpy(it.addressOf(0), nsData.bytes, nsData.length)
    }
}

When I send this as

image/png

, I get a "Bad Content-Type format: text; charset=utf-8" error

Are you sending it using Ktor??

Yes, attaching byte array as body

I think your content type is wrong.

Well yes, the error is telling me the content type is wrong. I'm trying to figure out if it's an issue with the way I'm generating the

ByteArray

in iOS, since the process of image -> bytearray -> send through HTTP works in Android. For context, I am uploading to AWS API Gateway, and sending the image file as binary data through Ktor as

image/png

has been working fine for me

Okay. Your code to convert nsdata to

ByteArray

is correct. That's what we use currently. Maybe you should try to save the result of the cropped image. I guess you tried that