[英]Cocoa Xcode: Open Window Controller from AppDelegate Programmatically using Swift 4 for Mac?
[英]Cocoa Mac : creating window from AppDelegate
我正在尋找一個從AppDelegate創建窗口的簡單(和Mac特定)示例。 我的程序有一個登錄頁面,可能需要也可能不需要在應用程序啟動時顯示,具體取決於用戶是否已經登錄。
到目前為止,我的AppDelegate的applicationDidFinishLaunching看起來像這樣:
func applicationDidFinishLaunching(_ aNotification: Notification) {
// Insert code here to initialize your application
let main = NSStoryboard(name : "Main", bundle: nil).instantiateController(withIdentifier: "MainWindow") as! NSWindowController
main.window?.becomeFirstResponder()
let mainVc = NSStoryboard(name:"Main", bundle: nil).instantiateController(withIdentifier: "MainViewController") as! ViewController
main.window?.contentViewController = mainVc
}
但是當我運行應用程序時沒有任何反應。 我應該注意,我已取消設置應用設置的“主界面”屬性。 如果我沒有取消它,那么我想要的兩個版本的Window出現了,這表明我對上面幾乎是正確的。
我錯過了什么?
您需要在applicationDidFinishLaunching方法中聲明您的NSWindowController變量main。 您還需要調用makeKeyAndOrderFront(nil)而不是becomeFirstResponder:
import Cocoa
@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
var main: NSWindowController!
func applicationDidFinishLaunching(_ aNotification: Notification) {
// Insert code here to initialize your application
main = NSStoryboard(name : "Main", bundle: nil).instantiateController(withIdentifier: "MainWindow") as! NSWindowController
let mainVc = NSStoryboard(name:"Main", bundle: nil).instantiateController(withIdentifier: "MainViewController") as! ViewController
main.window?.contentViewController = mainVc
main.window?.makeKeyAndOrderFront(nil)
}
func applicationWillTerminate(_ aNotification: Notification) {
// Insert code here to tear down your application
}
}
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