保存照片并立即使用

我有以下用于拍照并将其保存到相机胶卷的代码。我需要能够在保存后使用它，而不必返回图库并选择它。

我还没有找到任何关于如何执行此操作的示例。

    @IBOutlet weak var imagePicked: UIImageView!

    @IBAction func CameraBtn(sender: UIButton) {
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera) {
            var imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = UIImagePickerControllerSourceType.Camera;
            imagePicker.allowsEditing = false
            self.presentViewController(imagePicker, animated: true, completion: nil)
            cameraBool = true
        }
    }

    @IBAction func GalleryBtn(sender: UIButton) {
        println("gallery button clicked")
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.PhotoLibrary) {
            var imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary;
            imagePicker.allowsEditing = true
            self.presentViewController(imagePicker, animated: true, completion: nil)
            cameraBool = false
        }
    }

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
        imagePicked.image = image
        if (cameraBool){
            var imageData = UIImageJPEGRepresentation(imagePicked.image, 0.6)
            var compressedJPGImage = UIImage(data: imageData)
            UIImageWriteToSavedPhotosAlbum(compressedJPGImage, nil, nil, nil)

        }
        self.dismissViewControllerAnimated(true, completion: nil);
    }

我需要能够在以下 Web 服务功能中使用此保存的图像：

func urlRequestWithComponents(urlString:String, parameters:Dictionary<String, String>, imageData:NSData) -> (URLRequestConvertible, NSData) {

        // create url request to send
        var mutableURLRequest = NSMutableURLRequest(URL: NSURL(string: urlString)!)
        mutableURLRequest.HTTPMethod = Alamofire.Method.POST.rawValue
        let boundaryConstant = "myRandomBoundary12345";
        let contentType = "multipart/form-data;boundary="+boundaryConstant
        mutableURLRequest.setValue(contentType, forHTTPHeaderField: "Content-Type")



        // create upload data to send
        let uploadData = NSMutableData()

        // add image
        uploadData.appendData("\r\n--\(boundaryConstant)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
        uploadData.appendData("Content-Disposition: form-data; name=\"file\"; filename=\"file.png\"\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
        uploadData.appendData("Content-Type: image/png\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
        uploadData.appendData(imageData)

        // add parameters
        for (key, value) in parameters {
            uploadData.appendData("\r\n--\(boundaryConstant)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
            uploadData.appendData("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n\(value)".dataUsingEncoding(NSUTF8StringEncoding)!)
        }
        uploadData.appendData("\r\n--\(boundaryConstant)--\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)



        // return URLRequestConvertible and NSData
        return (Alamofire.ParameterEncoding.URL.encode(mutableURLRequest, parameters: nil).0, uploadData)
    }

当我从图库中选择图像并将其放置在屏幕上的 imageView 中时，我的网络服务正在运行。但是当我拍照时，我需要先将其保存到库中，我现在已经完成了，但我缺少的是如何以编程方式从库中引用这张新创建的照片。

UPDATE:我假设从 nsurl 到 nsdata 的转换将如下从相机块检索到的那样。注意当用户选择拍照选项时，cameraBool 设置为 true。 ImageChanged是在imagePickerController函数中设置的

if (imageChanged){
        //changed from placeholder
            if (!cameraBool){
                //retrieved from gallery
                let image = pic
                let imageData = UIImagePNGRepresentation(image)
            }
            else{
                //retrieved from camera
                let imageData = NSData(contentsOfURL: cameraPath)
            }
        }
        else{
            //upload nil
            let imageData = nil
        }

我的问题是图像的路径仅在我的 imagePickerController 函数中定义。因此，我需要在文件顶部声明cameraPath，以便可以在 imagePickerController 函数中使用它，然后在我的上传 Web 服务中使用它。看来我无法将cameraPath初始化为nil。所以我不确定如何初始化它？

var cameraPath : NSURL = nil
//not allowed

当我刚刚有：

var cameraPath : NSURL

我收到错误消息，我的控制器没有初始化程序

您可以通过以下方式获取最近添加的相机图像的路径：

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
    imagePicked.image = image
   if (cameraBool){
        var imageData = UIImageJPEGRepresentation(imagePicked.image, 0.6)
        var compressedJPGImage = UIImage(data: imageData)
        ALAssetsLibrary().writeImageToSavedPhotosAlbum(compressedJPGImage!.CGImage, orientation: ALAssetOrientation(rawValue: compressedJPGImage!.imageOrientation.rawValue)!,
        completionBlock:{ (path:NSURL!, error:NSError!) -> Void in
            println("\(path)")  //Here you will get your path
        })
    }
    self.dismissViewControllerAnimated(true, completion: nil);
}

它将打印这样的路径：

assets-library://asset/asset.JPG?id=C5E0EB97-5D3D-41F9-8782-F48140144432&ext=JPG