AES-256- GCM encryption iOS not working

[arindamSantraAECB]

For iOS AES-256- GCM encryption not working. PLEASE CHECK MY CODE . help me to resolve this

func getencreptedtext256(text:String) -> String {

    // encryption part begins
    let digest = SHA2(variant: SHA2.Variant.sha256)
    let encryptedKeyText = "TEST"
    let shaFull = digest.calculate(for: Array(encryptedKeyText.utf8))
    let shaKey = copyOfRange(arr: shaFull, from: 0, to: 16)!
    let IV = copyOfRange(arr: shaFull, from: 0, to: 12)!
    let gcm = GCM(iv: iv, mode: .combined)
            
    let encrypted: Array<UInt8> = try! AES(
        key: shaKey,
        blockMode: gcm,
        padding: .noPadding
    )
        .encrypt(text.bytes)
    let encryptedText = removeWhiteSpaces(text: encrypted.toBase64())
    print("enc base64: \(encryptedText)")
    
    return encryptedText
    
    
}

[krzyzanowskim]

What exactly do you mean by "not working"?