Swift 3 将图像上传到 PHP 失败

Posted 2023-03-16

【中文标题】Swift 3 将图像上传到 PHP 失败

【英文标题】：Swift 3 Upload image to PHP Fail

【发布时间】：2016-09-21 09:34:42

【问题描述】：

上传图片失败 我通过 POST 将图像发送到 php

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate 

@IBOutlet var image: UIImageView!

override func viewDidLoad() 
    super.viewDidLoad()  


@IBAction func selectPicture(_ sender: AnyObject) 

    let ImagePicker = UIImagePickerController()
    ImagePicker.delegate = self
    ImagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary

    self.present(ImagePicker, animated: true, completion: nil)       


func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) 

    image.image = info[UIImagePickerControllerOriginalImage] as? UIImage
    self.dismiss(animated: true, completion: nil)


@IBAction func upload_request(_ sender: AnyObject) 
    UploadRequest()
   

func UploadRequest()

    let url = URL(string: "http://127.0.0.1/imgJSON/img.php")

    let request = NSMutableURLRequest(url: url!)
    request.httpMethod = "POST"

    let boundary = generateBoundaryString()        

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

    if (image.image == nil)
    
        return
    

    let image_data = UIImagePNGRepresentation(image.image!)

    if(image_data == nil)
    
        return
    

    let body = NSMutableData()

    let fname = "test.png"
    let mimetype = "image/png"

    body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
    body.append("Content-Disposition:form-data; name=\"test\"\r\n\r\n".data(using: String.Encoding.utf8)!)
    body.append("hi\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 = URLSession.shared.dataTask(with: request as URLRequest)             (
        data, response, error) in

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

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

        print(dataString)            
    
    task.resume()       
    

func generateBoundaryString() -> String

    return "Boundary-\(UUID().uuidString)"

在 PHP 中

if (move_uploaded_file($_FILES['file']['tmp_name'], "image.png")) 
echo "File uploaded: ".$_FILES["file"]["name"]; 

【参考方案1】：

您的第二个屏幕截图显示了问题： 这是带有 PHP 警告的服务器回复，在您的情况下，apache/php 用户无权将上传的图像移动到目标目录，这将是根目录 (/) - 因为您没有指定目录/路径在哪里存储图像。请参阅 PHP 文档的Example 1。

所以你应该创建一个上传目录（例如 mkdir /Appli.../htdocs/uploads ，设置正确的权限（用于开发目的 chmod -R 777 上传 ) 并在您的 PHP 中指定目标目录：

if (move_uploaded_file($_FILES['file']['tmp_name'], "/Appli.../htdocs/uploads/image.png"))  ...

【讨论】：

它在 php 中不起作用 if (move_uploaded_file($_FILES['file']['tmp_name'], "/Applications/XAMPP/xamppfiles/htdocs/image.png")) echo "File上传：".$_FILES["file"]["name"];我运行应用程序但显示dropbox.com/s/gd87ym4yfr0lao3/…

您现在将图像直接保存到您的 htdocs /Applications/XAMPP/xamppfiles/htdocs/ 请尝试以下操作：

对不起，我在这里打断了完整的评论：您现在将图像直接保存到您的 htdocs 文件夹：/Applications/XAMPP/xamppfiles/htdocs，请在您的 终端上尝试以下操作: mkdir /Applications/XAMPP/xamppfiles/htdocs/uploads && chmod -R 777 /Applications/XAMPP/xamppfiles/htdocs/uploads 然后在PHP上使用: if (move_uploaded_file($_FILES['文件']['tmp_name'], "/Applications/XAMPP/xamppfiles/htdocs/uploads/image.png"))

不工作，我测试 html 表单发送图像到 PHP dropbox.com/s/1br0v98znwlainr/3.png?dl=0

啊，好吧，该目录已经存在，所以只需执行以下操作： sudo chmod -R 777 /Applications/XAMPP/xamppfiles/htdocs/imgJSON 如果这是您要存储图像的目录。