要将PHAsset的引用从“所有照片”/“相机卷轴”移动到特定的PHAssetCollection,可以按照以下步骤进行操作:
fetchAssetCollections(with:subtype:options:)
方法获取到目标PHAssetCollection的引用。可以根据自己的需求选择不同的subtype参数,例如PHAssetCollectionType.album表示相册,PHAssetCollectionType.smartAlbum表示智能相册等。changeRequest(for:assets:)
方法创建一个PHAssetChangeRequest对象,将要移动的PHAsset添加到该请求中。changeRequest(for:assets:)
方法创建一个PHAssetCollectionChangeRequest对象,将目标PHAssetCollection和之前创建的PHAssetChangeRequest对象添加到该请求中。shared()
方法获取到PHPhotoLibrary的实例。performChanges(_:completionHandler:)
方法中执行之前创建的PHAssetCollectionChangeRequest和PHAssetChangeRequest,将PHAsset移动到目标PHAssetCollection。下面是一个示例代码:
import Photos
func moveAssetToCollection(asset: PHAsset, collection: PHAssetCollection) {
PHPhotoLibrary.shared().performChanges({
let assetChangeRequest = PHAssetChangeRequest(for: asset)
let collectionChangeRequest = PHAssetCollectionChangeRequest(for: collection)
collectionChangeRequest?.addAssets([assetChangeRequest.placeholderForCreatedAsset!] as NSFastEnumeration)
}, completionHandler: { success, error in
if success {
print("Asset moved successfully.")
} else {
print("Error moving asset: \(error?.localizedDescription ?? "")")
}
})
}
// Usage example
let assetToMove: PHAsset = ... // The asset you want to move
let targetCollection: PHAssetCollection = ... // The target collection you want to move the asset to
moveAssetToCollection(asset: assetToMove, collection: targetCollection)
这样,你就可以将PHAsset的引用从“所有照片”/“相机卷轴”移动到特定的PHAssetCollection了。
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