Alamofire错误代码= -1000"URL未指向文件URL"

Question

从我正在开发的iOS应用程序上传图像到我的服务器时出现问题.我正在使用Alamofire和a UIImagePickerController.

里面的didFinishPickingMediaWithInfo委托方法我节省了用户选择的文件NSURL从info[UIImagePickerControllerReferenceURL]一个命名的变量self.imageNSURL.

将此传递给Alamofires就这样上传multipartFormData方法(几乎是他们的文档中的标准复制和粘贴)

Alamofire.upload(
    .POST,
    URLString: "http://app.staging.acme.com/api/users/\(id)/picture",
    multipartFormData: { multipartFormData in
        multipartFormData.appendBodyPart(fileURL: self.imageNSURL, name: "image")
    },
    encodingCompletion: { encodingResult in
        switch encodingResult {
        case .Success(let upload, _, _):
            upload.responseJSON { request, response, JSON, error in
                println(JSON)
            }
        case .Failure(let encodingError):
            println(encodingError)
        }
    }
)   

我得到的错误是

Error Domain=com.alamofire.error Code=-1000 "The operation couldn’t be completed. The URL does not point to a file URL: assets-library://asset/asset.JPG?id=00000000-0000-0000-0000-000000000000&ext=JPG" UserInfo=0x00000000000 {NSLocalizedFailureReason=The URL does not point to a file URL: assets-library://asset/asset.JPG?id=00000000-0000-0000-0000-000000000000&ext=JPG}

请注意,我在这篇文章的回复中已经确认了ID,实际的错误信息包含有效的错误信息.

Answer 1

这是因为从info[UIImagePickerControllerReferenceURL]该 URL 返回的 URL 指向 asset-library/asset，这是由于沙箱造成的。因此您无法使用此 URL 访问该文件，这就是为什么 alamofire 抱怨您的 URL 不是文件 URL。为了解决这个问题，您可以使用multipartFormData.appendBodyPart(data: data, name: name)此方法将要发送的数据直接作为NSData. 完整代码示例：

let imagePicked = info[UIImagePickerControllerOriginalImage]
let imageExtenstion = info[UIImagePickerControllerReferenceURL]
// imageExtenstion will be "asset.JPG"/"asset.JPEG"/"asset.PNG"
// so we have to remove the asset. part
var imagePickedData : NSData
switch imageExtenstion {
    case "PNG": imagePickedData = UIImagePNGRepresentation(imagePicked)!
   // compressionQuality is a float between 0.0 and 1.0 with 0.0 being most compressed with lower quality and 1.0 least compressed with higher quality
    case "JPG", "JPEG": imagePickedData = UIImageJPEGRepresentation(image, compressionQuality)!
}
Alamofire.upload(.POST, YOUR_URL, multipartFormData: { multipartFormData in 
     multipartFormData.appendBodyPart(data: imagePickedData, name: imageName)
 }, encodingCompletion: { encodingResult in
    switch encodingResult {
    case .Success(let upload, _, _):
        upload.responseJSON { request, response, JSON, error in
            print(JSON)
        }
    case .Failure(let encodingError):
        print(encodingError)
    }
})