小编The*_*y77的帖子

我是新手，我一直在尝试从iPhone的本地存储上传pdf，docx和图像文件。我已经编写了一个代码，但是它不起作用，并且不断从响应中获取状态代码：415。这是我的代码：

func uploadfileToServer(completed: @escaping () -> ()){

    let theTitle = labelTitle.text


    guard let url = URL(string: "http://www.--------.com/assignment/post") else {return}
    var request = URLRequest.init(url: url)
    request.httpMethod = "POST"

    request.addValue("cf7ab8c9d4efae82b575eabd6bec76cbb86c6108391e036387f3dd5356a582171519367747000", forHTTPHeaderField: "api_key")




    let boundary = generateBoundaryString()


    // Set Content-Type in HTTP header.
    let boundaryConstant = boundary // This should be auto-generated.
    let contentType = "multipart/form-data; boundary=" + boundaryConstant

    let directory = NSTemporaryDirectory()
    let fileName = NSUUID().uuidString

    // This returns a URL? even though it is an NSURL class method
    let …

如上所示，我有这个按钮导航视图，每当我启动我的应用程序时，默认情况下我的“类别”选项卡会突出显示，但我想让我的“主页”选项卡在我启动应用程序时突出显示，任何人都可以帮助我离它远一点？