Apple 文件应用程序通过文件提供程序扩展执行 "Move" 操作我的扩展显示禁用

Question

在我的文件提供程序扩展中，我想在我的 NoteProvider 扩展中执行移动操作。

我可以通过任何文件夹上方的拖动操作移动任何文件，它可以正常工作但是当我尝试 "Move" 通过波纹管屏幕中的操作显示时，屏幕 2 显示和其他扩展已启用，但我的 NotProvider 扩展被禁用。

我的代码是FileProviderItem

class FileProviderItem: NSObject, NSFileProviderItem {

    public var id: String?
    public var name: String?
    var childItemCount : NSNumber?
    var documentSize: NSNumber?
    var creationDate : Date?
    var contentModificationDate : Date?
    var lastUsedDate: Date?
    var isDownloaded: Bool = false

    public var fTypeIdentifier: String?

    var pid : NSFileProviderItemIdentifier!

    var parentItemIdentifier: NSFileProviderItemIdentifier {
        return pid
    }

    var typeIdentifier: String {
        return fTypeIdentifier! // for folder =  "public.folder", for file  = file type UTI
    }

    var itemIdentifier: NSFileProviderItemIdentifier {
        return NSFileProviderItemIdentifier(self.id!)
    }

    var filename: String {
        return self.name!
    }

    override init() {

    }

    override func isEqual(_ object: Any?) -> Bool {
        if let obj = object as? FileProviderItem {
            if self.itemIdentifier == obj.itemIdentifier {
                return true
            }
        }
        return false
    }

    var capabilities: NSFileProviderItemCapabilities {
        return .allowsAll
    }
}

对于FileProviderExtension

class FileProviderExtension: NSFileProviderExtension {

 override func item(for identifier: NSFileProviderItemIdentifier) throws -> NSFileProviderItem {
    // resolve the given identifier to a record in the model
    // db = Array of NSFileProviderItem
    for i in db {
        if i.itemIdentifier.rawValue == identifier.rawValue {
            return i
        }
    }

    // TODO: implement the actual lookup
    throw NSError(domain: NSCocoaErrorDomain, code: NSNotFound, userInfo:[:])
}

override func importDocument(at fileURL: URL, toParentItemIdentifier parentItemIdentifier: NSFileProviderItemIdentifier, completionHandler: @escaping (NSFileProviderItem?, Error?) -> Void) {

    print("importDocument :- \(fileURL) parentItemIdentifier = \(parentItemIdentifier)")
    completionHandler(nil, nil)
 }

 override func reparentItem(withIdentifier itemIdentifier: NSFileProviderItemIdentifier, toParentItemWithIdentifier parentItemIdentifier: NSFileProviderItemIdentifier, newName: String?, completionHandler: @escaping (NSFileProviderItem?, Error?) -> Void) {

        print("reparentItem :- \(itemIdentifier) parentItemIdentifier = \(parentItemIdentifier) newName = \(String(describing: newName))")

        guard let item = try? item(for: itemIdentifier) as? FileProviderItem else {
            completionHandler(nil, NSFileProviderError(.noSuchItem))
            return
        }

        item?.pid = NSFileProviderItemIdentifier(rawValue: parentItemIdentifier.rawValue)
        //item?.name = newName
        completionHandler(item, nil)

    }

}

NoteProvider(FileProvider) .plist 文件图像

Answer 1

return NSFileProviderItem itemForIdentifier 方法中标识符 NSFileProviderRootContainerItemIdentifier 的实例。如果您 return 根标识符为 nil，应用程序将不会在移动操作中启用。

Apple 文件应用程序通过文件提供程序扩展执行 "Move" 操作我的扩展显示禁用

Apple File Application perform "Move" action via file provider extension my extention display disable

ios

swift3

swift4

fileprovider-extension