xcode 8 swift 3图像文件不会上传到服务器

Question

使用Xcode 8，Swift 3和PHP。

Xcode和PHP运行没有错误。

为什么不将模拟器中的displayPic.image保存到服务器的pic1-1.png中？所有出现的都是空白文件。

的Xcode：

@IBAction func sendToServer(_ sender: UIButton) { 

    let url = NSURL(string: "http://www.example.com/picSaver.php") 

    var request = URLRequest(url: url! as URL) 

    request.httpMethod = "POST" 

    var boundary = generateBoundaryString() 

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

    if (displayPic.image == nil) 
    { return } 

    let image_data = UIImagePNGRepresentation(displayPic.image!) 
    var body = NSMutableData() 
    let fname = "porch-167.png" 
    let mimetype = "image/png" 

    body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!) 
    body.append("Content-Disposition:form-data; 
name=\"photo\"\r\n\r\n".data(using: String.Encoding.utf8)!) 
    body.append("Incoming\r\n".data(using: String.Encoding.utf8)!) 
    body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!) 
    body.append("Content-Disposition:form-data; name=\"file\"; 
filename=\"\(fname)\"\r\n".data(using: String.Encoding.utf8)!) 
    body.append("Content-Type: \(mimetype)\r\n\r\n".data(using: 
String.Encoding.utf8)!) 
    body.append(image_data!) 
    body.append("\r\n".data(using: String.Encoding.utf8)!) 
    body.append("--\(boundary)--\r\n".data(using: 
String.Encoding.utf8)!) 

    request.httpBody = body as Data 

    let session = URLSession.shared 

    let task = session.dataTask(with: request as URLRequest) { 
     (
     data, response, error) in 

     guard let _:Data = data, let _:URLResponse = response , error 
== nil else { 
      print("error") 
      return 
      } 

     let dataString = String(data: data!, encoding: 
String.Encoding(rawValue: String.Encoding.utf8.rawValue)) 
     print(dataString) 

     } 

    task.resume() 
} 

} 

func generateBoundaryString() -> String { 

return "Boundary-\(NSUUID().uuidString)"  
} 

picSaver.php

<?php 
$p=$_REQUEST["filename"] 
move_uploaded_file($p["tmp_name"], pic1-1.png); 

$data=Array("Reply"=>"Image saved at server"); 
echo json_encode($data); 
?> 

是 “文件名” 正确的参数为$ P $ _REQUEST的要求吗？

Answer 1

它现在工作完美无瑕。将$ _REQUEST更改为$ _FILES，将“filename”更改为“file”

<?php 
$p=$_FILES["file"] 
move_uploaded_file($p["tmp_name"], "pic1-1.png"); 

$data=Array("Reply"=>"Image saved at server"); 
echo json_encode($data); 
?>