使用iOS中的Photos Framework将视频保存到自定义相册 [英] Save video to a custom Album using Photos Framework in iOS

问题描述

我想将使用自定义相机拍摄的视频保存到照片库中的 NewAlbum 使用照片框架。
我找到了一些答案，但他们提到使用现在已弃用的 ALAssetsLibrary 。

I want to save a video that is taken using a custom camera to a particular album say NewAlbum in the Photos Library using the Photos Framework. I have found some answers but they referred to use of ALAssetsLibrary which is deprecated now.

如果您需要更多细节，请告诉我，如果我错过了某些内容，请纠正我。
谢谢

Kindly let me know if you need any more details, also rectify me if I missed something. Thanks

推荐答案

我不知道如何创建 PHAsset 来自Video对象，但是当你可以实现这一点时，

I'm not sure how to create a PHAsset from an Video object but when you can achieve that,

我找到了一个解决方案To 从视频中创建PHAsset ：

I found a solution To create a PHAsset from an Video:

代码块1：

PhotoLibrary.shared().performChanges({
    let createAssetRequest = PHAssetChangeRequest.creationRequestForAssetFromVideoAtFileURL(/*Your url here*/)
    placeholder = createAssetRequest.placeholderForCreatedAsset
    identifier = placeholder.localIdentifier
}, completionHandler: {
    success, error in 
    /* 
       Fetch Asset with the identifier here
       after that, add the PHAsset into an album
    */
    newAsset = PHAsset.fetchAssets(withLocalIdentifiers: [identifier], options: nil).firstObject
}

你可以添加 PHAsset ，包含以下代码段：

you can add the PHAsset with the following snippet:

代码区块2：

PhotoLibrary.shared().performChanges({

    guard let addAssetRequest = PHAssetCollectionChangeRequest(for: /*your specific album here as PHAssetCollection*/) else { return }

    addAssetRequest.addAssets([newAsset] as NSArray)
}, completionHandler: {
    success, error in
    //handle error or stuff you want to do after that here
})

编辑创建示例PHAssetCollection

EDIT Example for create a PHAssetCollection

在这种情况下，我获取了创建 PHAssetCollection 在 performChanges（_：，completionHandler：）闭包中创建后，将其放入 @escaping 关闭该函数。

In this case, I fetched the create PHAssetCollection after it was created in the performChanges(_:,completionHandler:) closure and put it in the @escaping closure of that function.

PHPhotoLibrary.shared().performChanges({

        let createRequest = PHAssetCollectionChangeRequest.creationRequestForAssetCollection(withTitle: name)
        placeHolderIdentifier = createRequest.placeholderForCreatedAssetCollection.localIdentifier

    }, completionHandler: {
        success, error in
        if success {
            var createdCollection: PHAssetCollection? = nil
            if placeHolderIdentifier != nil {
                createdCollection = PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [placeHolderIdentifier!], options: nil).firstObject
            }
            completion(success, createdCollection as? T)
        } else {
            LogError("\(error)")
            completion(success, nil)
        }
    })

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