Question

我正在使用自定义图像选择器来选择时间流逝，我想获取所选时间流逝的网址，以便我可以播放时间流逝。

- (void)qb_imagePickerController:(QBImagePickerController *)imagePickerController didFinishPickingAssets:(NSArray *)assets {
for (PHAsset *asset in assets) {



    NSURL *url = [NSURL URLWithString: assetURLgoesHere];
    AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:url options:nil];
    AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:avAsset];
    AVPlayer *videoPlayer = [AVPlayer playerWithPlayerItem:playerItem];


    [videoPlayer play];

}

[self dismissViewControllerAnimated:YES completion:NULL];
}

这就是我现在所拥有的，但我需要获得资产的网址。

我通常使用swift，但是这个自定义图像选择器是用objective-c编写的。所以我有点客观-c菜鸟

更新了代码

- (void)qb_imagePickerController:(QBImagePickerController *)imagePickerController didFinishPickingAssets:(NSArray *)assets {
for (PHAsset *asset in assets) {

    - (PHImageRequestID)requestAVAssetForVideo:(PHAsset *)asset options:(PHVideoRequestOptions *)options resultHandler:(void (^)(AVAsset *asset, AVAudioMix *audioMix, NSDictionary *info))resultHandler

    NSURL *url = [NSURL URLWithString: asset];
    AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:url options:nil];
    AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:avAsset];
    AVPlayer *videoPlayer = [AVPlayer playerWithPlayerItem:playerItem];


    [videoPlayer play];

}

[self dismissViewControllerAnimated:YES completion:NULL];
}

Answer 1

顺便说一句，如果你想要实际的URL - 也就是说，UIImagePickerController在创建时传递给AVPlayerItem的那个URL，以及看起来像URL的那个URL将与AVAssetReader / Writer一起使用 - 然后这样做：

[[PHImageManager defaultManager] requestAVAssetForVideo:phAsset options:nil resultHandler:^(AVAsset *avAsset, AVAudioMix *audioMix, NSDictionary *info) {
    NSURL *url = (NSURL *)[[(AVURLAsset *)avAsset URL] fileReferenceURL];
    NSLog(@"url = %@", [url absoluteString]);
    NSLog(@"url = %@", [url relativePath]);
 }];

尽管phAsset是PHAsset对象，而avAsset是由PHImageManager生成的生成的AVAsset对象，但从上面的代码输出到控制台将产生，例如：

2016-04-16 01:15:40.155 ChromaEpsilon[3423:933358] url = file:///.file/id=16777218.8262005
2016-04-16 01:15:40.155 ChromaEpsilon[3423:933358] url = /private/var/mobile/Media/DCIM/108APPLE/IMG_8421.MOV

Answer 2

您应该使用PHImageManager。

使用班级sharedInstance并使用PHAsset，选项和完成块处理程序调用此方法：

- (PHImageRequestID)requestAVAssetForVideo:(PHAsset *)asset options:(PHVideoRequestOptions *)options resultHandler:(void (^)(AVAsset *asset, AVAudioMix *audioMix, NSDictionary *info))resultHandler

处理程序会为您AVAsset提供AVPlayerItem，而不是网址。

示例：

[[PHImageManager defaultManager] requestAVAssetForVideo:asset options:nil resultHandler:^(AVAsset *avAsset, AVAudioMix *audioMix, NSDictionary *info) {
  // Use the AVAsset avAsset
  AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:avAsset];
  AVPlayer *videoPlayer = [AVPlayer playerWithPlayerItem:playerItem];
}];

请注意它可能存在异步，这会进一步干扰您的应用程序流程。

Answer 3

对于Swift 3.0 您可以从PHAsset对象
获取图像和视频的字符串URL

asset.requestContentEditingInput(with: PHContentEditingInputRequestOptions(), completionHandler: { (contentEditingInput, dictInfo) in

    if asset.mediaType == .image
    {
      if let strURL = contentEditingInput?.fullSizeImageURL?.absoluteString
      {
         print("IMAGE URL: ", strURL)
      }
    }
    else
    {
      if let strURL = (contentEditingInput!.avAsset as? AVURLAsset)?.url.absoluteString
      {
         print("VIDEO URL: ", strURL)
      }
    }
  })

Answer 4

在PHAsset的视频网址中，我曾经在 Swift 2 （播放来自PHAsset的视频）上准备了一个效用函数。分享这个答案，可能对某人有帮助。

static func playVideo (view:UIViewController, asset:PHAsset)

请检查此Answer

Answer 5

在Swift 4.0和iOS 9.0+中@HirenPanchal的正确答案

startPayment().then()

startPayment(): Promise {
   //...
   return payNow.then(() => {
       return createOrder();
   });
}

createOrder(): Promise {
    // ...
    return itemRef.push...
}

Answer 6

从QBImagePickerController中的didFinishPickingAssets从Swift 4.2中的PHAsset获取视频URL

let imagePicker = QBImagePickerController()
imagePicker.delegate = self
imagePicker.numberOfColumnsInPortrait = 2
imagePicker.maximumNumberOfSelection = 2
imagePicker.allowsMultipleSelection = true
imagePicker.mediaType = .video

self.present(imagePicker, animated: true, completion: nil)

func qb_imagePickerController(_ imagePickerController: 
QBImagePickerController!, didFinishPickingAssets assets: [Any]!) {
    for asset in assets
    {
        PHCachingImageManager().requestAVAsset(forVideo: asset as! PHAsset, 
        options: nil, resultHandler: {(asset, audioMix, info) -> Void in
            if asset != nil {
                let avasset = asset as! AVURLAsset
                let urlVideo = avasset.url
                yourarray.add(urlVideo as URL)
            }

        })

    }


    imagePickerController.dismiss(animated: true) {
         //You can access video urls here
         print("Total Videos:\(yourarray.count)")
    }

 }

获取PHAsset的URL

6 个答案:

从QBImagePickerController中的didFinishPickingAssets从Swift 4.2中的PHAsset获取视频URL