How to save image or video from UIPickerViewController to document directory?

问题

Handle selected image or video:

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    print("ok")

    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
        //what to do to save that image
    } else {
        //how to get the video and save
    }
}

Save it to the document directory:

let path = try! NSFileManager.defaultManager().URLForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomain: NSSearchPathDomainMask.UserDomainMask, appropriateForURL: nil, create: false)
let newPath = path.URLByAppendingPathComponent("image.jpg") //or video.mpg for example

How to save that image to following newPath?

回答1:

Use following steps to save Image to documents directory

Step 1: Get a path to document directory

let path = try! NSFileManager.defaultManager().URLForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomain: NSSearchPathDomainMask.UserDomainMask, appropriateForURL: nil, create: false)

Step 2: Append FileName in path

let newPath = path.stringByAppendingPathComponent("image.jpg")

Step 3: Decide filetype of Image either JPEG or PNG and convert image to data(byte)

//let pngImageData = UIImagePNGRepresentation(image) // if you want to save as PNG
let jpgImageData = UIImageJPEGRepresentation(image, 1.0)   // if you want to save as JPEG

Step 4: write file to created path

let result = jpgImageData!.writeToFile(newPath, atomically: true)

Add above code into your didFinishPickingImage function.

Use following func to save video to documents directory

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) 
{
    // *** store the video URL returned by UIImagePickerController *** //
    let videoURL = info[UIImagePickerControllerMediaURL] as! NSURL

    // *** load video data from URL *** //
    let videoData = NSData(contentsOfURL: videoURL)

    // *** Get documents directory path *** //
    let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0]

    // *** Append video file name *** //
    let dataPath = documentsDirectory.stringByAppendingPathComponent("/videoFileName.mp4")

    // *** Write video file data to path *** //
    videoData?.writeToFile(dataPath, atomically: false)
}

回答2:

Updating the accepted answer to Swift 3 in Xcode 8.3.3

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
        let path = try! FileManager.default.url(for: FileManager.SearchPathDirectory.documentDirectory, in: FileManager.SearchPathDomainMask.userDomainMask, appropriateFor: nil, create: false)
        let newPath = path.appendingPathComponent("image.jpg")
        let jpgImageData = UIImageJPEGRepresentation(image, 1.0)
        do {
            try jpgImageData!.write(to: newPath)
        } catch {
            print(error)
        }

    } else {
        let videoURL = info[UIImagePickerControllerMediaURL] as! NSURL
        let videoData = NSData(contentsOf: videoURL as URL)
        let path = try! FileManager.default.url(for: FileManager.SearchPathDirectory.documentDirectory, in: FileManager.SearchPathDomainMask.userDomainMask, appropriateFor: nil, create: false)
        let newPath = path.appendingPathComponent("/videoFileName.mp4")
        do {
            try videoData?.write(to: newPath)
        } catch {
            print(error)
        }
    }
}

回答3:

Swift 5

func getDocumentsDirectory() -> URL {
        let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
        return paths[0]
    }

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        picker.dismiss(animated: true)
        guard let image = info[.editedImage] as? UIImage else {
            print("No image found")
            return
        }
        // saving to application directory
        let imageName = UUID().uuidString
        let imagePath = getDocumentsDirectory().appendingPathComponent(imageName)
        if let jpegData = image.jpegData(compressionQuality: 0.8) {
            print("Image Save to path \(imagePath)")
            try? jpegData.write(to: imagePath)
        }
     }

来源：https://stackoverflow.com/questions/33916652/how-to-save-image-or-video-from-uipickerviewcontroller-to-document-directory

标签

ios

swift

nsfilemanager