从pdf数据iOS显示PDF

Question

我正在尝试使用Swift在我的iOS应用程序中显示pdf。我从服务器得到的响应是pdf数据，它看起来如下所示：

%PDF-1.4%ôiá1 0 obj

我检查了iOS PDF阅读器和PDFKit，但主要问题是我不明白如何处理应用程序中的响应。

fileprivate func loadPdf() {
    startIndication()
    var session: URLSession!
    let sessionConfig = URLSessionConfiguration.default
    session = URLSession(configuration: sessionConfig, delegate: nil, delegateQueue: nil)

    guard let URL = URL(string: "http://localhost:3000/pdf-download") else { return }

    let token = "Bearer " + self.user!.token!

    var request = URLRequest(url: URL)
    request.httpMethod = "POST"
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.addValue(token, forHTTPHeaderField: "Authorization")
    var invData:[String:Any] = [String:Any]()
    invData["INVID"] = invoice.ID
    request.httpBody = try! JSONSerialization.data(withJSONObject: invData, options: [])

    let task = session.dataTask(with: request) { (data:Data?, response: URLResponse?, error:Error?) in

        if error == nil {

            guard let data = data else { return }

            // I get the data but I cannot do anything with it

        } else {
            print("response: \(String(describing: error))")
        }
    }
    task.resume()
}

有什么想法吗？谢谢！

Answer 1

如果查看PDFReader的文档，可以使用数据创建PDF，并使用PDFViewController显示：

guard let data = data else { return }

let document = PDFDocument(fileData: data, fileName: "Sample PDF")!
//Display a PDFDocument
let readerController = PDFViewController.createNew(with: document)
navigationController?.pushViewController(readerController, animated: true)

或者使用苹果公司的PDFKit：

guard let data = data else, let doc = PDFDocument(data: data) { return }

let pdfView = PDFView()
pdfView.document = doc
/* present the View */