Hi, eveyone Is where any multiplatform Base64 library? Or maybe where is a way to convert string to NSString? I need to encode string with base64 in actual class for iOS platform

Feel free to create .def file with https://github.com/JetBrains/kotlin-native/blob/master/common/src/hash/cpp/Base64.cpp which encodes/decodes string to base64.

Or maybe where is a way to convert string to NSString?

Sure.

str as NSString

.

@svyatoslav.scherbina , thanks but for me compiler say “this cast can never success”.

@Nikolai just ignore this warning.

@svyatoslav.scherbina Ok, thanks I will try

@svyatoslav.scherbina about that warning, is there an existing issue we can follow to remove it in that special case? I'd rather not take the habit to ignore warnings.

My version of iOS Base64 encoder (I work without padding so I remove it)

/** Object to convert base 64 */
actual object Base64 {
    /** Decode [base64] string into bytes array */
    actual fun decode(base64: String): ByteArray {
        // For this library end padding is mandatory so add possible missing padding
        val value = base64.padEnd(
            length = ((base64.length + 3) / 4) * 4,
            padChar = '='
        )

        val data = NSData.create(value, 0) ?: throw ParseException("Invalid Base64 value $base64")
        @Suppress("UNCHECKED_CAST")
        val bytePtr = (data.bytes as CPointer<uint8_tVar>)

        return ByteArray(data.length.toInt()) { index ->
            bytePtr[index].toByte()
        }
    }

    /** Encode [bytes] array into a base64 String */
    actual fun encode(bytes: ByteArray) = memScoped {
        NSData.create(
            bytesNoCopy = bytes.toCValues().getPointer(this),
            length = bytes.size.toULong()
        ).base64EncodedStringWithOptions(0).dropLastWhile {
            // Remove any Base64 padding
            it == '='
        }
    }
}

@louiscad feel free to create one. Alternatively one can use

NSString.create(string = str)

.

Reported: https://youtrack.jetbrains.com/issue/KT-30959?project=kt

@svyatoslav.scherbina Cannot use

NSString.create(string = str)

in K/N 1.4.10

Cannot use 

NSString.create(string = str)

 in K/N 1.4.10

According to your screenshot, you don’t use the named argument (

string =

), which is important here.

NSString.create(string = str)

totally works for me.

Get it, thanks.