shu*_*una 4 swift mac-catalyst
在默认的“文件”菜单中,它有“打开最近的>”菜单项,并且它是自动添加的。目前,如果用户从 Finder 打开关联文件,则会自动添加最近的项目(在 Big Sur 上)。但是如果用户使用 UIDocumentPickerViewController 从我的应用程序打开,它不会添加最近的菜单项。
我想在“打开最近的>”下添加此菜单项并从我的代码中清除项目。有帮助文档或者示例代码吗?谢谢。
在 macOS Big Sur 中,UIDocument.open()自动将打开的文件添加到“打开最近使用的文件”菜单中。但是,菜单项没有文件图标(AppKit 中有文件图标!)。\n您可以查看 Apple 的示例构建基于文档浏览器的应用程序UIDocumentBrowserViewController,以获取使用和的示例UIDocument。
获取真实的东西要复杂得多,并且涉及到调用 Objective-C 方法。我知道有两种方法可以使用 UIKit+AppKit 手动填充“打开最近的”菜单\xe2\x80\x94,或使用私有 AppKit API“自动”填充。后者应该也可以在 Mac Catalyst 的早期版本(Big Sur 之前)中工作,但在 UIKit 中存在更多错误。
\n由于您无法直接在 Mac Catalyst 应用程序中使用 AppKit,因此有两种选择:
\n下面显示的示例是从 Mac Catalyst 调用 AppKit。
\nclass AppDelegate: UIResponder, UIApplicationDelegate {\n override func buildMenu(with builder: UIMenuBuilder) {\n guard builder.system == .main else { return }\n\n var recentFiles: [UICommand] = []\n if let recentFileURLs = ObjC.NSDocumentController.sharedDocumentController.recentDocumentURLs.asArray {\n for i in 0..<(recentFileURLs.count) {\n guard let recentURL = recentFileURLs.object(at: i) as? NSURL else { continue }\n guard let nsImage = ObjC.NSWorkspace.sharedWorkspace.iconForFile(recentURL.path).asObject else { continue }\n guard let imageData = ObjC(nsImage).TIFFRepresentation.asObject as? Data else { continue }\n let image = UIImage(data: imageData)?.resized(fittingHeight: 16)\n guard let basename = recentURL.lastPathComponent else { continue }\n let item = UICommand(title: basename,\n image: image,\n action: #selector(openDocument(_:)),\n propertyList: recentURL.absoluteString)\n recentFiles.append(item)\n }\n }\n\n let clearRecents = UICommand(title: "Clear Menu", action: #selector(clearRecents(_:)))\n if recentFiles.isEmpty {\n clearRecents.attributes = [.disabled]\n }\n let clearRecentsMenu = UIMenu(title: "", options: .displayInline, children: [clearRecents])\n\n let recentMenu = UIMenu(title: "Open Recent",\n identifier: nil,\n options: [],\n children: recentFiles + [clearRecentsMenu])\n builder.remove(menu: .openRecent)\n\n let open = UIKeyCommand(title: "Open...",\n action: #selector(openDocument(_:)),\n input: "O",\n modifierFlags: .command)\n let openMenu = UIMenu(title: "",\n identifier: nil,\n options: .displayInline,\n children: [open, recentMenu])\n builder.insertSibling(openMenu, afterMenu: .newScene)\n }\n\n @objc func openDocument(_ sender: Any) {\n guard let command = sender as? UICommand else { return }\n guard let urlString = command.propertyList as? String else { return }\n guard let url = URL(string: urlString) else { return }\n NSLog("Open document \\(url)")\n }\n\n @objc func clearRecents(_ sender: Any) {\n ObjC.NSDocumentController.sharedDocumentController.clearRecentDocuments(self)\n UIMenuSystem.main.setNeedsRebuild()\n }\n\nRun Code Online (Sandbox Code Playgroud)\n菜单不会自动刷新。您必须通过调用 来触发重建UIMenuSystem.main.setNeedsRebuild()。每当您打开文档(例如在提供给 的块中UIDocument.open())或保存文档时,您都必须执行此操作。下面是一个例子:
class MyViewController: UIViewController {\n var document: UIDocument? // set by the parent view controller\n override func viewWillAppear(_ animated: Bool) {\n super.viewWillAppear(animated)\n\n // Access the document\n document?.open(completionHandler: { (success) in\n if success {\n // Display the document\n } else {\n // Report error\n }\n\n // 500 ms is probably too long\n DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {\n UIMenuSystem.main.setNeedsRebuild()\n }\n })\n }\n}\nRun Code Online (Sandbox Code Playgroud)\n以下示例使用:
\nNSMenu\ 的私有 API_setMenuName:用于设置菜单名称以使其本地化,以及NSDocumentController\的_installOpenRecentMenus“打开最近的”菜单。- (void)setupRecentMenu {\n NSMenuItem *clearMenuItem = [self _findMenuItemWithName:@"Open Recent" in:NSApp.mainMenu.itemArray];\n if (!clearMenuItem) {\n NSLog(@"Warning: \'Open Recent\' menu not found");\n return;\n }\n NSMenu *openRecentMenu = [[NSMenu alloc] initWithTitle:@"Open Recent"];\n [openRecentMenu performSelector:NSSelectorFromString(@"_setMenuName:") withObject:@"NSRecentDocumentsMenu"];\n clearMenuItem.submenu = openRecentMenu;\n\n [NSDocumentController.sharedDocumentController valueForKey:@"_installOpenRecentMenus"];\n}\n\n- (NSMenuItem * _Nullable)_findMenuItemWithName:(NSString * _Nonnull)name in:(NSArray<NSMenuItem *> * _Nonnull)array {\n for (NSMenuItem *item in array) {\n if ([item.title isEqualToString:name]) {\n return item;\n }\n if (item.hasSubmenu) {\n NSMenuItem *subitem = [self _findMenuItemWithName:name in:item.submenu.itemArray];\n if (subitem) {\n return subitem;\n }\n }\n }\n return nil;\n}\nRun Code Online (Sandbox Code Playgroud)\n在你的buildMenu(with:):
class AppDelegate: UIResponder, UIApplicationDelegate {\n override func buildMenu(with builder: UIMenuBuilder) {\n guard builder.system == .main else { return }\n\n let open = UIKeyCommand(title: "Open...",\n action: #selector(openDocument(_:)),\n input: "O",\n modifierFlags: .command)\n let recentMenu = UIMenu(title: "Open Recent",\n identifier: nil,\n options: [],\n children: [])\n let openMenu = UIMenu(title: "",\n identifier: nil,\n options: .displayInline,\n children: [open, recentMenu])\n builder.remove(menu: .openRecent)\n builder.insertSibling(openMenu, afterMenu: .newScene)\n\n DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) { [weak self] in\n self?.myObjcBridge?.setupRecentMenu()\n }\n}\nRun Code Online (Sandbox Code Playgroud)\n但是,我发现这种方法存在一些问题。图标似乎已关闭(它们更大),并且“清除菜单”命令在第一次使用后并未禁用。重建菜单可以解决该问题。
\nmacCatalyst 14 (Big Sur) 确实安装了“打开最近使用的”菜单,但该菜单没有图标。
\n使用 Dynamic 包的速度明显慢。我按照 Peter Steinberg 的演讲在 Objective-C 中实现了相同的逻辑。虽然这有效,但我注意到图标太大,而且我找不到解决该问题的方法。
\n此外,使用 AppKit 的私有 API,“打开最近的”字符串不会自动本地化(但“清除菜单”会自动本地化!)。
\n我目前的做法是:
\nNSDocumentController查询最近的文件。\nb) 用于NSWorkspace获取文件的图标。buildMenu方法调用包,获取文件/图标并手动创建菜单项。NSImageNameMenuOnStateTemplate系统图像并将此大小提供给 macCatalyst 应用程序,以便它可以重新缩放图标。请注意,我还没有实现安全书签的逻辑(对此不熟悉,需要进一步研究)。彼得谈到了这一点。
\n显然,我需要自己提供字符串的翻译。但没关系。
\n这是应用程序包中的相关代码:
\n\n@interface RecentFile: NSObject<RecentFile>\n- (instancetype)initWithURL: (NSURL * _Nonnull)url icon:(NSImage *)image;\n@end\n\n@implementation AppKitBridge\n@synthesize recentFiles;\n@synthesize menuIconSize;\n@end\n\n- (instancetype)init {\n // ...\n NSImage *templateImage = [NSImage imageNamed:NSImageNameMenuOnStateTemplate];\n self->menuIconSize = templateImage.size;\n}\n\n- (NSArray<NSObject<RecentFile> *> *)recentFiles {\n NSArray<NSURL *> *recents = [[NSDocumentController sharedDocumentController] recentDocumentURLs];\n NSMutableArray<SGRecentFile *> *result = [[NSMutableArray alloc] init];\n for (NSURL *url in recents) {\n if (!url.isFileURL) {\n NSLog(@"Warning: url \'%@\' is not a file URL", url);\n continue;\n }\n NSImage *icon = [[NSWorkspace sharedWorkspace] iconForFile:[url path]];\n RecentFile *f = [[RecentFile alloc] initWithURL:url icon:icon];\n [result addObject:f];\n }\n return result;\n}\n\n- (void)clearRecentFiles {\n [NSDocumentController.sharedDocumentController clearRecentDocuments:self];\n}\nRun Code Online (Sandbox Code Playgroud)\nUIMenu然后从 macCatalyst 代码填充:
@available(macCatalyst 13.0, *)\nfunc createRecentsMenuCatalyst(openDocumentAction: Selector, clearRecentsAction: Selector) -> UIMenuElement {\n var commands: [UICommand] = []\n if let recentFiles = appKitBridge?.recentFiles {\n for rf in recentFiles {\n var image: UIImage? = nil\n if let cgImage = rf.image {\n image = UIImage(cgImage: cgImage).scaled(toHeight: menuIconSize.height)\n }\n let cmd = UICommand(title: rf.url.lastPathComponent,\n image: image,\n action: openDocumentAction,\n propertyList: rf.url.absoluteString)\n commands.append(cmd)\n }\n }\n let clearRecents = UICommand(title: "Clear Menu", action: clearRecentsAction)\n if commands.isEmpty {\n clearRecents.attributes = [.disabled]\n }\n let clearRecentsMenu = UIMenu(title: "", options: .displayInline, children: [clearRecents])\n\n let menu = UIMenu(title: "Open Recent",\n identifier: UIMenu.Identifier("open-recent"),\n options: [],\n children: commands + [clearRecentsMenu])\n return menu\n}\nRun Code Online (Sandbox Code Playgroud)\n