快速视频到文档目录 [英] swift video to document directory

问题描述

我需要将使用 UIImagePicker 捕获的视频保存到应用程序文档目录中的自定义文件夹

I need to save video captured with UIImagePicker to a custom folder in app document directory

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    picker.dismissViewControllerAnimated(true, completion: nil)
    if let fileURL = info[UIImagePickerControllerMediaURL] as? NSURL {
        if let videoData = NSData(contentsOfURL: fileURL) {
            //save file to doc dir or save NSData into Core Data binary field

        }
    }
}

或者，我可以使用外部存储将 videoData 保存在 Core Data 二进制字段中，但是在我无法使用媒体播放器播放视频之后，因为我无法将 NSData 转换为 NSURL.

alternatively I can save videoData in Core Data binary field with external storage but after I can't play the video with media player because I can't convert NSData to NSURL.

推荐答案

在 Swift 3 中试试这个

Try this for Swift 3

    var uniqueVideoID = ""
    var videoURL:NSURL? = NSURL()
    var uniqueID = ""

    //Add this to ViewDidLoad
    uniqueID = NSUUID().UUIDString


    //Getting the path as URL and storing the data in myVideoVarData.
            videoURL = info[UIImagePickerControllerMediaURL] as? URL as NSURL?
        let myVideoVarData = try! Data(contentsOf: videoURL! as URL)

        //Now writeing the data to the temp diroctory.
        let tempPath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
        let tempDocumentsDirectory: AnyObject = tempPath[0] as AnyObject
            uniqueVideoID = uniqueID  + "TEMPVIDEO.MOV"
        let tempDataPath = tempDocumentsDirectory.appendingPathComponent(uniqueVideoID) as String
            try? myVideoVarData.write(to: URL(fileURLWithPath: tempDataPath), options: [])

        //Getting the time value of the movie.
        let fileURL = URL(fileURLWithPath: tempDataPath)
        let asset = AVAsset(url: fileURL)
        let duration : CMTime = asset.duration
            videoAlertIdVar = duration.value // Control for the runVideoAlert function.

        //Now we remove the data from the temp Document Diroctory.
        do{
        let fileManager = FileManager.default
        try fileManager.removeItem(atPath: tempDataPath)
        } catch {
            //Do nothing
        }

        // Cheacking to see if video is under the 18500 (:30 seconds).
        if duration.value <= 18500 {
           yesOrNo = "no" //Control for the button in the mainViewController is hidden or not. The default is "yes"

        //Here we are writing the data to the Document Directory for use later on.
        let docPaths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
        let documentsDirectory: AnyObject = docPaths[0] as AnyObject
            uniqueVideoID = uniqueID  + "VIDEO.MOV"
        let docDataPath = documentsDirectory.appendingPathComponent(uniqueVideoID) as String
            try? myVideoVarData.write(to: URL(fileURLWithPath: docDataPath), options: [])
            print("docDataPath under picker ",docDataPath)

        //This creates a thumbnail image.
        let assetImageGenerate = AVAssetImageGenerator(asset: asset)
            assetImageGenerate.appliesPreferredTrackTransform = true
        let time = CMTimeMake(asset.duration.value / 3, asset.duration.timescale)

         //This adds the thumbnail to the imageview.
        if let videoImage = try? assetImageGenerate.copyCGImage(at: time, actualTime: nil) {
            videoThumbnailOutlet.image = UIImage(cgImage: videoImage)
          }
        }else{
            //Do nothing
   }

播放视频

    //Note: The _videoData_ is the same as the _uniqueID_
    var videoData = ""

     func play (){

    let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
    let documentsDirectory = paths[0]

    let videoDataPath = documentsDirectory + "/" + videoData + "VIDEO.MOV"

    let filePathURL = URL(fileURLWithPath: videoDataPath)


    let player = AVPlayer(url: filePathURL)
    let playerController = AVPlayerViewController()
        playerController.player = player
    self.present(playerController, animated: true) {
        player.play()


    }
}

这篇关于快速视频到文档目录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！