How to programmatically open the app window from the background in SwiftUI on macOS (not iOS)? - swift

I have a very simple SwiftUI app that runs in the menu bar and should periodically open an app window (there is only one window/view in the whole app) from inside a repeating timer in the background.
How do I actually open the app window from code?
Here's a simplified AppDelegate.swift example showing what I'm trying to do:
import Cocoa
import SwiftUI
#NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
var window: NSWindow!
func applicationDidFinishLaunching(_ aNotification: Notification) {
// Create the SwiftUI view that provides the window contents.
let contentView = ContentView()
// Create the window and set the content view.
window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.center()
window.setFrameAutosaveName("Main Window")
window.contentView = NSHostingView(rootView: contentView)
window.makeKeyAndOrderFront(nil)
var loop = 0
Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true) { timer in
loop+=1
if (loop % 10 == 0) {
// TODO: How to close the window?
} else {
// TODO: How to reopen the window?
}
}
}
}

One approach is to hide/unhide the application itself
func applicationDidFinishLaunching(_ aNotification: Notification) {
//setup of window etc ...
Timer.scheduledTimer(withTimeInterval: 3, repeats: true, block: { _ in
if self.window.isVisible {
NSApp.hide(self)
} else {
NSApp.unhide(self)
}
})
}

Related

How can I override windowDidLoad method in a custom class in order get notified my window did load?

All I am trying in this question is about get notified when window itself did load, in order to try solve the issue i make a sub class of NSWindowController and named it as MyNSWindowController and put my needed code for solving the issue, but Xcode make an error of:
Cannot convert value of type 'NSWindowController' to specified type 'MyNSWindowController'
Here is my codes:
import Cocoa
import SwiftUI
class AppDelegate: NSObject, NSApplicationDelegate {
private var window: NSWindow!
func applicationDidFinishLaunching(_ aNotification: Notification) {
buildMainMenu()
buildWindow()
}
func buildWindow() {
window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 100.0, height: 100.0),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.setFrameAutosaveName("Main Window")
window.title = "No Storyboard Window"
window.makeKeyAndOrderFront(window)
window.center()
}
func buildMainMenu() {
let appMainMenu: NSMenu = NSMenu()
let mainMenu: NSMenuItem = NSMenuItem()
mainMenu.submenu = NSMenu(title: "MainMenu")
let mainMenuItem0 = NSMenuItem(title: "About", action: #selector(NSApplication.about), keyEquivalent: "a")
mainMenuItem0.keyEquivalentModifierMask = .command
let mainMenuItem1 = NSMenuItem(title: "Close", action: #selector(NSWindow.performClose(_:)), keyEquivalent: "w")
mainMenuItem1.keyEquivalentModifierMask = .command
let mainMenuItem2 = NSMenuItem(title: "Quit", action: #selector(NSApplication.shared.terminate(_:)), keyEquivalent: "q")
mainMenuItem2.keyEquivalentModifierMask = .command
mainMenu.submenu?.items = [mainMenuItem0, mainMenuItem1, mainMenuItem2]
appMainMenu.items = [mainMenu]
NSApp.mainMenu = appMainMenu
}
}
extension NSApplication {
#objc func about() {
AboutView().openInWindow(title: "About My App", sender: self)
}
}
struct AboutView: View {
var body: some View {
Color.green
.frame(width: 500, height: 200)
}
}
extension View {
#discardableResult
func openInWindow(title: String, sender: Any?) -> NSWindow {
let window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 500.0, height: 500.0),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
// let myNSWindowController: NSWindowController = NSWindowController(window: window)
let myNSWindowController: MyNSWindowController = NSWindowController(window: window)
window.makeKeyAndOrderFront(window)
window.center()
window.isReleasedWhenClosed = false
window.setFrameAutosaveName("Main Window")
window.title = "No Storyboard Window"
window.contentView = NSHostingView(rootView: self)
return window
}
}
class MyNSWindowController: NSWindowController {
override func windowDidLoad() {
print("Window did load!")
}
}
If you think my plan is not good about get notified when window get load, you can come with better answer for solving the issue and goal, I have to say I am trying to find a native way in Cocoa to work as .onAppear modifier which we have in SwiftUI. In SwiftUI .onAppear modifier is for content of view, here in this question i just want to know when the window did load or appear, just the window itself not what carry this window.

How can I get notified about window get loaded in macOS Cocoa?

So there is a modifier in SwiftUI called .onAppear which allow us to know the view get appeared, I am looking to same functionality in Cocoa macOS, so there is method in AppDelegate in Cocoa called applicationDidFinishLaunching so I am looking for something like that for Windows, let say I am looking something like windowDidFinishLaunching, so I just want window notify me when window did launch or shown, in my question I am lunching a window called about, so how can i know that about window get fully lunched and shown in screen? So the goal is to get notified when about window did lunch or fully shown in screen.
import Cocoa
import SwiftUI
class AppDelegate: NSObject, NSApplicationDelegate {
private var window: NSWindow!
func applicationDidFinishLaunching(_ aNotification: Notification) {
buildMainMenu()
buildWindow()
}
func buildWindow() {
window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 100.0, height: 100.0),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.setFrameAutosaveName("Main Window")
window.title = "No Storyboard Window"
window.makeKeyAndOrderFront(window)
window.center()
}
func buildMainMenu() {
let appMainMenu: NSMenu = NSMenu()
let mainMenu: NSMenuItem = NSMenuItem()
mainMenu.submenu = NSMenu(title: "MainMenu")
let mainMenuItem0 = NSMenuItem(title: "About", action: #selector(NSApplication.about), keyEquivalent: "a")
mainMenuItem0.keyEquivalentModifierMask = .command
let mainMenuItem1 = NSMenuItem(title: "Close", action: #selector(NSWindow.performClose(_:)), keyEquivalent: "w")
mainMenuItem1.keyEquivalentModifierMask = .command
let mainMenuItem2 = NSMenuItem(title: "Quit", action: #selector(NSApplication.shared.terminate(_:)), keyEquivalent: "q")
mainMenuItem2.keyEquivalentModifierMask = .command
mainMenu.submenu?.items = [mainMenuItem0, mainMenuItem1, mainMenuItem2]
appMainMenu.items = [mainMenu]
NSApp.mainMenu = appMainMenu
}
}
extension NSApplication {
#objc func about() {
AboutView().openInWindow(title: "About My App", sender: self)
}
}
struct AboutView: View {
var body: some View {
Color.green
}
}
extension View {
#discardableResult
func openInWindow(title: String, sender: Any?) -> NSWindow {
let window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 100.0, height: 100.0),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.makeKeyAndOrderFront(window)
window.center()
window.setFrameAutosaveName("Main Window")
window.title = "No Storyboard Window"
window.contentView = NSHostingView(rootView: self)
return window
}
}
By the way I am using a main file for lunching my application like this:
import Cocoa
// **** Main **** //
let nsApplication = NSApplication.shared
let appDelegate = AppDelegate()
nsApplication.delegate = appDelegate
nsApplication.run()

Where is the correct place to build the needed Window for app in Cocoa macOS

I am confused to find the concert way for building the needed Window for app, so one of source say that I have to use this down code:
import Cocoa
import SwiftUI
class ViewController: NSViewController {
override func viewWillAppear() {
self.view = NSHostingView(rootView: ContentView())
self.view.window?.makeKeyAndOrderFront(nil)
self.view.window?.standardWindowButton(NSWindow.ButtonType.zoomButton)?.isHidden = true
self.view.window?.standardWindowButton(NSWindow.ButtonType.miniaturizeButton)?.isHidden = true
self.view.window?.standardWindowButton(NSWindow.ButtonType.closeButton)?.isHidden = true
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override var representedObject: Any? {
didSet {
// Update the view, if already loaded.
}
}
}
And some other source says I have use this code:
#main
class AppDelegate: NSObject, NSApplicationDelegate {
func applicationDidFinishLaunching(_ aNotification: Notification) {
// Insert code here to initialize your application
let window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 300, height: 300),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.center()
window.setFrameAutosaveName("Main Window")
window.contentView = NSHostingView(rootView: ContentView())
window.makeKeyAndOrderFront(nil)
window.standardWindowButton(NSWindow.ButtonType.zoomButton)?.isHidden = true
window.standardWindowButton(NSWindow.ButtonType.miniaturizeButton)?.isHidden = true
window.standardWindowButton(NSWindow.ButtonType.closeButton)?.isHidden = true
}
func applicationWillTerminate(_ aNotification: Notification) {
// Insert code here to tear down your application
}
func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
return true
}
}
Which I am really confused which one is needed and why? can some one explain it to me?

Adding a Menu to the app menu in AppKit using NSMenu

I'm trying to add a menu to the app menu through Appkit by using the NSMenu Class. But I'm not sure how to call it so far I've tried:
class AppDelegate: NSObject, NSApplicationDelegate {
var window: NSWindow!
var menu: NSMenu!
func applicationDidFinishLaunching(_ aNotification: Notification) {
// Create the SwiftUI view that provides the window contents.
let contentView = ContentView()
// Create the window and set the content view.
window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 480, height: 512),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.isReleasedWhenClosed = false
window.center()
window.setFrameAutosaveName("Main Window")
window.contentView = NSHostingView(rootView: contentView)
window.makeKeyAndOrderFront(nil)
class myMenu: NSMenu {
init(aTitle: "HelloWorld")
}
}
But this only gives me "Expected parameter type following ':'" and "'required' initializer 'init(coder:)' must be provided by subclass of 'NSMenu'".
I use separate functions for buildWnd and buildMenu, but this should work using your technique. Create a new file in your swift project called main.swift and delete the pre-existing AppDelegate. Copy/paste this code into the main.swift file.
import Cocoa
class AppDelegate: NSObject, NSApplicationDelegate {
var window: NSWindow!
// var menu: NSMenu!
func applicationDidFinishLaunching(_ aNotification: Notification) {
// Create the SwiftUI view that provides the window contents.
// let contentView = ContentView()
// Create the window and set the content view.
window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 480, height: 512),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.isReleasedWhenClosed = false
window.center()
window.setFrameAutosaveName("Main Window")
// window.contentView = NSHostingView(rootView: contentView)
window.makeKeyAndOrderFront(nil)
let mainMenu = NSMenu()
NSApp.mainMenu = mainMenu
// **** App menu **** //
let appMenuItem = NSMenuItem()
mainMenu.addItem(appMenuItem)
let appMenu = NSMenu()
appMenuItem.submenu = appMenu
appMenu.addItem(withTitle:"Quit", action:#selector(NSApplication.terminate), keyEquivalent: "q")
}
}
let appDelegate = AppDelegate()
// **** Main **** //
let application = NSApplication.shared
application.delegate = appDelegate
//application.activate(ignoringOtherApps:true)
application.run()

How to use the MacOS app dock menu to re-open the app that has been closed (by using the red button located on the top left corner)?

Good Day,
When I close my MacOS app by using the red button (located at the top left corner), the MacOS application disapears but the dock icon is still there at the bottom.
If I click right on the dock icon I want to add a "Re-Open" menu item to re-open the app.
Below is the code produced to a certain point... When I click on "Re-Open" it prints "XXX" in the console... because I have not found the code to re-open the app!
Any help would be much appreciated to fill up the below function call reOpen(sender : NSMenuItem)
Thanks
Below is my AppDelegate.swift file content:
import Cocoa
import SwiftUI
#NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
var window: NSWindow!
func applicationDidFinishLaunching(_ aNotification: Notification) {
let contentView = ContentView()
window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.center()
window.setFrameAutosaveName("Main Window")
window.contentView = NSHostingView(rootView: contentView
window.makeKeyAndOrderFront(nil)
}
func applicationWillTerminate(_ aNotification: Notification) {
// Insert code here to tear down your application
}
func applicationDockMenu(_ sender: NSApplication) -> NSMenu? {
let menu = NSMenu()
let reOpenMenuItem = NSMenuItem(title:"Re-Open", action:#selector(AppDelegate.reOpen), keyEquivalent:"")
menu.addItem(reOpenMenuItem)
return menu
}
#objc func reOpen(sender : NSMenuItem) {
print("XXX")
}
}
Finally the final working code to add for the reOpen function is:
#objc func reOpen(sender : NSMenuItem) {
print("XXX")
let url = URL(fileURLWithPath: Bundle.main.resourcePath!)
let path = url.deletingLastPathComponent().deletingLastPathComponent().absoluteString
let task = Process()
task.launchPath = "/usr/bin/open"
task.arguments = [path]
task.launch()
exit(0)
}
I found the code here at this link:
enter link description here