Question

我使用此alamofire请求获取pdf文件，我想将其保存为NSData：

func makeDataCall(urlString: String, completionHandler: (responseObject: NSData?, error: NSError?) -> ()) {
    //Perform request
    Alamofire.request(.GET, urlString, headers: ["Authorization": auth])
        .responseData { request, response, responseData in
            print(request)
            print(response)
            print(responseData)
            completionHandler(responseObject: responseData.data, error: nil)
    }
}

在回复中我得到了这个：

"Content-Length" = 592783;
"Content-Type" = "application/pdf";

但responseData.data为零。

我做错了什么？

Answer 1

编辑我以前的回复，我过快地读了你的问题。

要下载像pdf这样的文件，您应该使用 Alamofire.download 而不是请求。

文档中有关于它的部分： https://github.com/Alamofire/Alamofire#downloading-a-file

刚刚从互联网上查看了一些随机的pdf，这对我很有用：

let destination = Alamofire.Request.suggestedDownloadDestination(directory: .DocumentDirectory, domain: .UserDomainMask)
Alamofire.download(.GET, "http://box2d.org/manual.pdf", destination: destination)
  .response { _, _, _, error in
  if let error = error {
    print("Failed with error: \(error)")
  } else {
    print("Downloaded file successfully")
  }
}

Answer 2

在Swift 4中，如果要下载pdf文件，请使用此代码

    let h: HTTPHeaders = [
        "Accept": "application/pdf",
        "Content-Type": "application/pdf",
    ]
    //random document name
    let randomString = NSUUID().uuidString

    let destination: DownloadRequest.DownloadFileDestination = { _, _ in
        var documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
        documentsURL.appendPathComponent("\(randomString).pdf")
        return (documentsURL, [.removePreviousFile])
    }

    Alamofire.download("yourURL",method: .get,headers: h, to: destination).response { response in
        if let destinationUrl = response.destinationURL {
            print("destinationUrl \(destinationUrl.absoluteURL)")
        }
    }

Alamofire将pdf作为NSData

2 个答案: