使用Swift从iOS中的PhotoLibrary中选择视频

Question

我正在尝试使用以下代码从PhotoLibrary中选择视频

imageController.mediaTypes = [kUTTypeMovie: NSString]

选择视频后,当它正在压缩时,我正在摆脱边界问题.

我在网上搜索,发现以下行.我无法将其转换为Swift版本(链接) imageController.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil]

请告知我们上面的Swift版本.如果任何人都可以提供Swift版本,这非常有用.

问题2:

我想在应用中显示所选视频,并且需要在点按时播放.我们可以在没有外部插件和使用内置库的情况下完成吗？

Answer 1

基于Swift 2.2

假设您有一个imagePickerController,并且当您想要选择图像和视频时:

let imagePickerController = UIImagePickerController()
var videoURL: NSURL?    

@IBAction func selectImageFromPhotoLibrary(sender: UIBarButtonItem) {
  imagePickerController.sourceType = .PhotoLibrary
  imagePickerController.delegate = self
  imagePickerController.mediaTypes = ["public.image", "public.movie"]

  presentViewController(imagePickerController, animated: true, completion: nil)    
}

然后在选择视频后,打印出其NSURL.

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
  videoURL = info["UIImagePickerControllerReferenceURL"] as? NSURL
  print(videoURL)
  imagePickerController.dismissViewControllerAnimated(true, completion: nil)
}

问题2:

是的,您可以通过AVPlayer完成,您需要导入AVKit和AVFoundation,您的代码可能如下所示:

if let videoURL = videoURL{
  let player = AVPlayer(URL: videoURL)

  let playerViewController = AVPlayerViewController()
  playerViewController.player = player

  presentViewController(playerViewController, animated: true) {
    playerViewController.player!.play()
  }
}

我在这里做了一个你可以参考的演示,也许不是100%你想要的.

Answer 2

Swift 5+ 解决方案：

func openVideoGallery() {
    picker = UIImagePickerController()
    picker.delegate = self
    picker.sourceType = .savedPhotosAlbum
    picker.mediaTypes = ["public.movie"]      
    picker.allowsEditing = false
    present(picker, animated: true, completion: nil)
}

Answer 3

斯威夫特3

import MobileCoreServices

var imagePickerController = UIImagePickerController()
var videoURL: URL?

private func openImgPicker() {
    imagePickerController.sourceType = .savedPhotosAlbum
    imagePickerController.delegate = self
    imagePickerController.mediaTypes = ["public.movie"]
    present(imagePickerController, animated: true, completion: nil)
}

extension YourViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        videoURL = info[UIImagePickerControllerMediaURL] as? URL
        print("videoURL:\(String(describing: videoURL))")
        self.dismiss(animated: true, completion: nil)
    }
}

Answer 4

@IBOutlet weak var imgView: UIImageView!
var imagePickerController = UIImagePickerController()
var videoURL : NSURL?

@IBAction func btnSelectVideo_Action(_ sender: Any) {
    imagePickerController.sourceType = .savedPhotosAlbum
    imagePickerController.delegate = self
    imagePickerController.mediaTypes = [kUTTypeMovie as String]
    present(imagePickerController, animated: true, completion: nil)
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    videoURL = info[UIImagePickerControllerMediaURL]as? NSURL
    print(videoURL!)
    do {
        let asset = AVURLAsset(url: videoURL as! URL , options: nil)
        let imgGenerator = AVAssetImageGenerator(asset: asset)
        imgGenerator.appliesPreferredTrackTransform = true
        let cgImage = try imgGenerator.copyCGImage(at: CMTimeMake(0, 1), actualTime: nil)
        let thumbnail = UIImage(cgImage: cgImage)
        imgView.image = thumbnail
    } catch let error {
        print("*** Error generating thumbnail: \(error.localizedDescription)")
    }
    self.dismiss(animated: true, completion: nil)
}

问题2:

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

}

Answer 5

func openCamera() {
  if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera) {
    println("captureVideoPressed and camera available.")

    var imagePicker = UIImagePickerController()

    imagePicker.delegate = self
    imagePicker.sourceType = .Camera
    imagePicker.mediaTypes = [kUTTypeMovie!]
    imagePicker.allowsEditing = false

    imagePicker.showsCameraControls = true

    self.presentViewController(imagePicker, animated: true, completion: nil)   
  } else {
    println("Camera not available.")
  }  
}

func imagePickerController(  didFinishPickingMediaWithInfo info:NSDictionary!) {
  videoUrl = info[UIImagePickerControllerMediaURL] as! NSURL!
  let pathString = videoUrl.relativePath
  self.dismissViewControllerAnimated(true, completion: nil)
}