如何上传用户个人资料图片

Question

我正在尝试将个人资料图像上传到用户个人资料，但个人资料图像未显示在个人资料页面上，没有弹出错误，因此，我如何重组此代码以解决此问题？

 if let ProfileImageUrl = dictionary?["photo"] as? String {
                     let url = URL(string: ProfileImageUrl)
                    URLSession.shared.dataTask(with: url!, completionHandler: { ( data, response, Error ) in
                        if Error != nil {
                            print(Error!)
                        return
            }
                        DispatchQueue.main.async {
                            self.ProfileImage.image = UIImage(data: data!)
                        }

Answer 1

尾随闭包中的“错误”应为“错误”。这只是命名约定的问题，不一定会导致代码失败。

发现问题，您在数据任务上缺少“ .resume（）”。以下代码有效：

if let imageUrl = urlString{
        let url = URL(string: imageUrl)
        URLSession.shared.dataTask(with: url!) { (data, response, error) in
            if let error = error{
                print("Error : \(error)")
                return
            }
            DispatchQueue.main.async {
                self.image.image = UIImage(data: data!)
            }
        }.resume()

    }

Answer 2

首先，您需要按按钮进行上传（浏览器已上传）所以只需创建按钮，然后创建按钮操作

@IBAction func doUplodPImg(_ sender: Any) {
    let image = UIImagePickerController()
    image.delegate = self

    image.sourceType = UIImagePickerController.SourceType.photoLibrary

    image.allowsEditing = false

    self.present(image, animated: true)
    {
        //After it is complete
    }

}

并且还添加一个功能

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
{
    if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
            {
                profileImg.image = image
            }
            else
            {
                //Error message
            }
    guard let selectedImage = info[.originalImage] as? UIImage else {
        fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
    }
    profileImg.image = selectedImage

    self.dismiss(animated: true, completion: nil)
}

现在您可以在UIimageview中成功上传照片。请将您自己的名称profileImg更改为您的UIimageview名称

确保在顶部viewcontroller委托中添加了UIImagePickerControllerDelegate

并且如果要上传到服务器中，则只需使用alamofire方法

    Alamofire.upload(
        multipartFormData: { multipartFormData in
            if let _image = self.profileImg.image {
                if let imageData = _image.jpegData(compressionQuality: 0.7) {
                    multipartFormData.append(imageData, withName: "profile_image", fileName: "image.jpg", mimeType: "image/jpg")
                }
            }
            for (key, value) in parameters {
                multipartFormData.append(value.data(using: String.Encoding.utf8)!, withName: key)
            }
    }, to: url, method: .post)
    { (response) in
        switch response {
        case .success(let upload,_,_):
            upload.responseJSON { res in
                let response = res.result.value as? NSDictionary
                print(response)
  }
        case .failure(_): break

        }

}

使用此profile_image（服务器端参数）更改参数名称，即时消息

希望这会有所帮助。如果您遇到任何困难，请告诉我。