xcode - 如何在macOS下的非基于文档的应用程序中添加选项卡？

Question

我喜欢用Xcode 8在Swift 3中构建一个应用程序，它应该启用Apple标签栏。它不是基于文档的。我了解到here，如果我例如在窗口 Controller 中重写@IBAction func newWindowForTab(_ sender: Any?)方法，则可以启用选项卡。为了测试这一点，我使用 Storyboard 在Xcode中创建了一个新项目，添加了NSWindowController的子类并将其分配到 Storyboard 中。然后我实现了

@IBAction override func newWindowForTab(_ sender: Any?) {}

并在构建应用程序时显示选项卡栏。重建后，我注意到只有在构建之前关闭应用程序时标签栏不可见时，才会出现“+”按钮。那是个错误吗？如何添加新标签？

Answer 1

好的，这是新文件，

代理

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

func applicationDidFinishLaunching(_ aNotification: Notification) {
    // Insert code here to initialize your application
}

func applicationWillTerminate(_ aNotification: Notification) {
    // Insert code here to tear down your application
}

func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
    return true
}

@IBAction func newWindowForTab(_ sender: Any?){
} // without this the + button doesn't show from start

}

ViewController

import Cocoa

class ViewController: NSViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
}

override var representedObject: Any? {
    didSet {
    // Update the view, if already loaded.
    }
}
}

和WindowController

import Cocoa

class WindowController: NSWindowController {

var subview: WindowController?

override func windowDidLoad() {
    super.windowDidLoad()
    // Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
}

@IBAction override func newWindowForTab(_ sender: Any?) {

    let story = self.storyboard
    let windowVC: WindowController = story?.instantiateInitialController() as! WindowController

    self.window?.addTabbedWindow(windowVC.window!, ordered: .above)
    self.subview = windowVC

    windowVC.window?.orderFront(self.window)
    windowVC.window?.makeKey()
}

}

您必须添加菜单项并将其在菜单 View 中的FirstResponder上连接到newWindowForTab:操作，分配键，说cmd + t起作用，此示例仅是通过+按钮添加选项卡，并且窗口菜单选项起作用，“将选项卡移至新窗口”和“合并所有窗口”。您可以将标签页拖出并放回，水平移动标签页。
看起来很有效。

使用Xcode 8.2 beta(8C30a)完成