不推荐使用的数据函数

我刚开始一个项目,遇到了一个不推荐使用的函数。在谷歌搜索之后,我找到了几种解决方案,但只针对错误的第一部分。我的问题是,我不知道如何处理同样不推荐使用的嵌套零件。功能如下:

private static func compute(data: Data, operation: Int) -> Data {
    let cryptLength = size_t(data.count + kCCBlockSizeAES128)
    var cryptData = Data(count:cryptLength)

    let keyLength = size_t(kCCKeySizeAES128)
    let options = CCOptions(kCCOptionPKCS7Padding)

    var numBytesEncrypted: size_t = 0

    let cryptStatus = cryptData.withUnsafeMutableBytes { cryptBytes in  <--- Warning 1
        data.withUnsafeBytes { dataBytes in  <--- Warning 2
            Data(Encoded.iv).withUnsafeBytes { ivBytes in  <--- Warning 3
                Data(Encoded.key).withUnsafeBytes { keyBytes in  <--- Warning 4
                    CCCrypt(CCOperation(operation),
                            CCAlgorithm(kCCAlgorithmAES),
                            options,
                            keyBytes, keyLength,
                            ivBytes,
                            dataBytes, data.count,
                            cryptBytes, cryptLength,
                            &numBytesEncrypted)
                }
            }
        }
    }

    guard case UInt32(cryptStatus) == UInt32(kCCSuccess) = true else {
        print("Something went wrong: \(cryptStatus)")
        return cryptData
    }

    cryptData.removeSubrange(numBytesEncrypted..<cryptData.count)

    return cryptData
}

警告1: 'withUnsafeMutableBytes' is deprecated: use `withUnsafeMutableBytes<R>(_: (UnsafeMutableRawBufferPointer) throws -> R) rethrows -> R` instead

警告2,3+4: 'withUnsafeBytes' is deprecated: use `withUnsafeBytes<R>(_: (UnsafeRawBufferPointer) throws -> R) rethrows -> R` instead

我试过了 cryptData.withUnsafeMutableBytes { (cryptBytes: UnsafeMutablePointer) in 或添加 try 但要么出现新的错误,要么警告保持不变。

有人能帮忙吗?