使用UIDocumentBrowserViewController创建文档

文档documentBrowser(_:didRequestDocumentCreationWithHandler:)说:"创建一个新文档并将其保存到临时位置.如果使用UIDocument子类创建文档,则必须在调用importHandler块之前将其关闭."

所以我通过获取用户临时目录(FileManager.default.temporaryDirectory)的URL 并附加名称和扩展名(获取类似"file:/// private/var/mobile/Containers/Data/Application/C1DE454D-EA1E-的路径)来创建文件URL 4166-B137-5B43185169D8/TMP/Untitled.uti").但是当我调用save(to:for:completionHandler:)传递此URL时,永远不会回调完成处理程序.我也尝试使用url(for:in:appropriateFor:create:)在用户的临时目录中传递一个子目录 - 仍然没有调用完成处理程序.

我理解文档浏览器视图控制器由一个单独的进程管理,该进程有自己的读/写权限.除此之外,我很难理解问题所在.临时保存新文档的位置,以便文档浏览器进程可以移动它们？

更新:截至目前的测试版,我现在看到一个错误的域NSFileProviderInternalErrorDomain和代码1被记录:"不允许读者访问该URL." 至少那是对发生的事情的确认......

因此,首先,如果您使用的是自定义UTI,则必须正确设置.我看起来像这样......

CFBundleDocumentTypes

    
        CFBundleTypeIconFiles
        
            icon-file-name // Can be excluded, but keep the array
        
        CFBundleTypeName
        Your Document Name
        CFBundleTypeRole
        Editor
        LSHandlerRank
        Owner
        LSItemContentTypes
        
            com.custom-uti
        
    

和

UTExportedTypeDeclarations

    
        UTTypeConformsTo
        
            public.data  // My doc is saved as Data, not a file wrapper
        
        UTTypeDescription
        Your Document Name
        UTTypeIdentifier
        com.custom-uti
        UTTypeTagSpecification
        
            public.filename-extension
            
                doc-extension
            
        
    

也

UISupportsDocumentBrowser

我继承UIDocument的MyDocument,并添加下面的方法来创建一个新的临时文件...

static func create(completion: @escaping Result -> Void) throws {

    let targetURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("Untitled").appendingPathExtension("doc-extension")

    coordinationQueue.async {
        let document = MyDocument(fileURL: targetURL)
        var error: NSError? = nil
        NSFileCoordinator(filePresenter: nil).coordinate(writingItemAt: targetURL, error: &error) { url in
            document.save(to: url, for: .forCreating) { success in
                DispatchQueue.main.async {
                    if success {
                        completion(.success(document))
                    } else {
                        completion(.failure(MyDocumentError.unableToSaveDocument))
                    }
                }
            }
        }
        if let error = error {
            DispatchQueue.main.async {
                completion(.failure(error))
            }
        }
    }
}

然后按如下方式初始化并显示DBVC:

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    lazy var documentBrowser: UIDocumentBrowserViewCOntroller= {
        let utiDecs = Bundle.main.object(forInfoDictionaryKey: kUTExportedTypeDeclarationsKey as String) as! [[String: Any]]
        let uti = utiDecs.first?[kUTTypeIdentifierKey as String] as! String
        let dbvc = UIDocumentBrowserViewController(forOpeningFilesWithContentTypes:[uti])

        dbvc.delegate = self
        return dbvc
    }()

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

        window = UIWindow(frame: UIScreen.main.bounds)
        window?.rootViewCOntroller= documentBrowser
        window?.makeKeyAndVisible()

        return true
    }
}

我的委托方法如下:

func documentBrowser(_ controller: UIDocumentBrowserViewController, didRequestDocumentCreationWithHandler importHandler:    @escaping (URL?, UIDocumentBrowserViewController.ImportMode) -> Swift.Void) {

    do {
        try MyDocument.create() { result in
            switch result {
            case let .success(document):
                // .move as I'm moving a temp file, if you're using a template
                // this will be .copy 
                importHandler(document.fileURL, .move) 
            case let .failure(error):
                // Show error
                importHandler(nil, .none)
            }
        }
    } catch {
        // Show error
        importHandler(nil, .none)
    }
}

func documentBrowser(_ controller: UIDocumentBrowserViewController, didImportDocumentAt sourceURL: URL, toDestinationURL destinationURL: URL) {
    let document = MyDocument(fileURL: destinationURL)
    document.open { success in
        if success {
            // Modally present DocumentViewContoller for document
        } else {
            // Show error
        }
    }
}

这就是它.让我知道你是怎么办的!