使用iOS中的照片框架將視頻保存到自定義相冊中

Question

我想使用Photos Framework將使用自定義相機拍攝的視頻保存到Photos Library中的某個相冊中，例如NewAlbum。 我找到了一些答案，但他們提到使用ALAssetsLibrary現在已經棄用。

請讓我知道，如果您需要更多的細節，也糾正我，如果我錯過了什麼。 感謝

Answer 1

我不知道如何創建從視頻對象PHAsset但是當你可以做到這一點，

我找到了解決create a PHAsset from an Video：

碼塊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 
} 

你可以用下面的代碼片段添加PHAsset：

碼塊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 
}) 

EDIT實施例用於創建PHAssetCollection

在這種情況下，我取出的創建PHAssetCollection它在performChanges(_:,completionHandler:)閉合創建之後，並把它在該功能的關閉@escaping。

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) 
     } 
    })