Question

转换为Swift 3后，我尝试修复所有错误。但这个错误让我感到恶心：

无法使用类型'的参数列表调用'dataTask'（使用：NSMutableURLRequest，completionHandler：（Data？，URLResponse？，NSError？） - ＆gt; Void）'

在这行代码中（它在最后一行）：

 let request = NSMutableURLRequest(url: myUrl!)
    request.httpMethod = "POST"
    let para = ["userId" : user_ID]
    let boundary = generateBoundaryString()
    let imageA = images[pos]! as UIImage
    print(imageA)


    request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")



    let imageData = UIImageJPEGRepresentation(imageA, 1)

    request.httpBody = createBodyWithParameters(para, filePathKey: "file", imageDataKey: imageData!, boundary: boundary)


    URLSession.shared.dataTask(with:request, completionHandler: { (data:NSData, response:URLResponse?, error:NSError?) -> Void in

代码在这里继续，但这对解决方案来说并不重要。

Answer 1

编译器想要

...(data: Data?, response:URLResponse?, error:Error?)

和

...(data, response, error)

但我建议完全省略类型注释

{{1}}

Swift 3 .dataTask错误

1 个答案: