swift-playground - 有没有办法在 Swift playground 中使用 Common Crypto？

Question

我正在 Xcode Playground 上玩弄 REST API，我需要用 SHA1 散列一些东西。我找到的所有解决方案都依赖于 Common Crypto，而这似乎不能直接在 Swift playground 中使用。有没有办法在 Swift playground 中对某些东西进行 SHA1？

Answer 1

一个快速而肮脏的解决方案:

func SHA1HashString(string: String) -> String {
    let task = NSTask()
    task.launchPath = "/usr/bin/shasum"
    task.arguments = []

    let inputPipe = NSPipe()
    inputPipe.fileHandleForWriting.writeData(string.dataUsingEncoding(NSUTF8StringEncoding)!)
    inputPipe.fileHandleForWriting.closeFile()

    let outputPipe = NSPipe()
    task.standardOutput = outputPipe
    task.standardInput = inputPipe
    task.launch()

    let data = outputPipe.fileHandleForReading.readDataToEndOfFile()
    let hash = String(data: data, encoding: NSUTF8StringEncoding)!
    return hash.stringByReplacingOccurrencesOfString("  -\n", withString: "")
}