I am new to OSX development and I am making an app which fires a notification when something happens. But it isn't showing the notification when the app is the key app, as it is the default behavior. I want to show them even when the app IS the key app.
However I only found solutions to this matter that were written in objective-c but right now I am working with Swift. I was wondering how I could I implement it with Swift.
To ensure the notifications are always shown you'll need to set a delegate for NSUserNotificationCenter and implement userNotificationCenter(center:shouldPresentNotification:) -> Bool. The documentation says this message is
Sent to the delegate when the user notification center has decided not
to present your notification.
You can implement the delegate in any class of your choosing. Here is an example:
class AppDelegate: NSObject, NSApplicationDelegate, NSUserNotificationCenterDelegate {
func applicationDidFinishLaunching(aNotification: NSNotification) {
NSUserNotificationCenter.defaultUserNotificationCenter().delegate = self
}
func userNotificationCenter(center: NSUserNotificationCenter, shouldPresentNotification notification: NSUserNotification) -> Bool {
return true
}
Related
I am trying to create a very basic Swift command-line application that signals to another application using a WebSocket when the macOS UI changes to/from light/dark mode.
For some reason, the command-line tool is not receiving any notifications from DistributedNotificationCenter, in particular, AppleInterfaceThemeChangedNotification. However, running the exact same code in a Cocoa UI app on applicationDidFinishLaunching works perfectly fine.
I found an old Obj-C CLI project on Github that is meant to print out every notification, but that doesn't do anything either. It makes me suspect Apple perhaps changed something, but I cannot seem to find anything online about it. Are there certain Xcode project settings I need to set?
// main.swift
import Foundation
class DarkModeObserver {
func observe() {
print("Observing")
DistributedNotificationCenter.default.addObserver(
forName: Notification.Name("AppleInterfaceThemeChangedNotification"),
object: nil,
queue: nil,
using: self.interfaceModeChanged(notification:)
)
}
func interfaceModeChanged(notification: Notification) {
print("Notification", notification)
}
}
let observer = DarkModeObserver.init()
observer.observe()
RunLoop.main.run()
I managed to get iTunes notifications working, so it was just the theme change notifications that weren't working. Given this, I suspect Apple only sends the notifications to UI/NSApplication applications. As such, replacing the last 3 lines from above with the following works:
let app = NSApplication.shared
class AppDelegate: NSObject, NSApplicationDelegate {
func applicationDidFinishLaunching(_ notification: Notification) {
let observer = DarkModeObserver.init()
observer.observe()
}
}
let delegate = AppDelegate()
app.delegate = delegate
app.run()
I'm new to Swift (but not to programming). I have simple app that provides an alert based on specific conditionals. I would like to execute a function (or even just set a variable) when one of the buttons is pressed. Ideally, I just need one button, but if for whatever reason, only the notification.actionButtonTitle can have a handler, that's fine with me.
My notification code is currently in a Swift file as a helper.
import Foundation
class NotificationHelper {
static func sampleNotification(notification: NSUserNotification) {
let notificationCenter = NSUserNotificationCenter.default
notification.identifier = "unique-id-123"
notification.hasActionButton = true
notification.otherButtonTitle = "Close"
notification.actionButtonTitle = "Show"
notification.title = "Hello"
notification.subtitle = "How are you?"
notification.informativeText = "This is a test"
notificationCenter.deliver(notification)
}
}
Currently in AppDelegate, this is defined:
let notification = NSUserNotification()
…and I call the notification like this:
NotificationHelper.sampleNotification(notification: notification)
The resulting notification works, as you can see in the screenshot below. However, I cannot seem to listen to the button action. I have tried adding this to the AppDelegate as well as the NotificationHelper file, but I did not have any success with it:
func userNotificationCenter(center: NSUserNotificationCenter, didActivateNotification notification: NSUserNotification) {
print("checking notification response")
}
Any idea of what I'm missing?
Thanks!
You'll need to assign something as the delegate of the NSUserNotificationCenter:
NSUserNotificationCenter.default.delegate = self
If you add this to your AppDelegate and make your AppDelegate conform to NSUserNotificationCenterDelegate:
class AppDelegate: NSObject, NSUserNotificationCenterDelegate {
}
Trying to setup validation for a few text fields in a new (and very small) Swift Mac app. Following various other topics here on SO and a few other examples, I can still not get controlTextDidChange to propagate (to my ViewController).
E.g: How to live check a NSTextField - Swift OS X
I have read at least a dozen variations of basically that same concept. Since none of the accepted answers seem to work I am just getting more and more confused by something which is generally a fairly simple task on most platforms.
I have controlTextDidChange implemented to just call NSLog to let me know if I get anything.
AppDelegate should be part of the responder chain and should eventually handle controlTextDidChange but I see nothing there either.
Using the current Xcode I start a new project. Cocoa app, Swift, Storyboard and nothing else.
From what I can gather the below isolated example should work. In my actual app I have tried some ways of inserting the ViewController into the responder chain. Some answers I found suggested it was not always there. I also tried manually adding the ViewController as the delegate in code theTextField.delegate = self
Nothing I have done seems to get text changed to trigger any events.
Any ideas why I have so much trouble setting up this delegation?
My single textfield example app
Storyboard is about as simple as it gets:
AppDelegate
import Cocoa
#NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate, NSTextFieldDelegate, NSTextDelegate {
func applicationDidFinishLaunching(_ aNotification: Notification) {
// Insert code here to initialize your application
}
func applicationWillTerminate(_ aNotification: Notification) {
// Insert code here to tear down your application
}
func controlTextDidChange(notification: NSNotification) {
let object = notification.object as! NSTextField
NSLog("AppDelegate::controlTextDidChange")
NSLog("field contains: \(object.stringValue)")
}
}
ViewController
import Cocoa
class ViewController: NSViewController, NSTextFieldDelegate, NSTextDelegate {
#IBOutlet var theTextField: NSTextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override var representedObject: Any? {
didSet {
// Update the view, if already loaded.
}
}
func controlTextDidChange(notification: NSNotification) {
let object = notification.object as! NSTextField
NSLog("ViewController::controlTextDidChange")
NSLog("field contains: \(object.stringValue)")
}
}
I think the samples you're following are a bit out-of-date.
Try...
override func controlTextDidChange(_ notification: Notification) {
...as the function definition for your method in your NSTextFieldDelegate.
On Watch, I'm able to pass a saved workout from the WorkoutInterfaceController to the SummaryInterfaceController. But I was wondering how to pass the saved workout from the Watch to the iPhone (so I can display it in a Summary View Controller too).
Do you know? Or is there a better way I'm supposed to do this?
Here's what I use to pass the saved workout from WorkoutInterfaceController to the SummaryInterfaceController:
private func saveWorkout() {
// Create and save a workout sample
let configuration = workoutSession!.workoutConfiguration
let isIndoor = (configuration.locationType == .indoor) as NSNumber
print("locationType: \(configuration)")
let workout = HKWorkout(activityType: configuration.activityType,
start: workoutStartDate!,
end: workoutEndDate!,
workoutEvents: workoutEvents,
totalEnergyBurned: totalEnergyBurned,
totalDistance: totalDistance,
metadata: [HKMetadataKeyIndoorWorkout:isIndoor]);
healthStore.save(workout) { success, _ in
if success {
self.addSamples(toWorkout: workout)
}
}
WKInterfaceController.reloadRootControllers(withNames: ["SummaryInterfaceController"], contexts: [workout])
}
private func addSamples(toWorkout workout: HKWorkout) {
// Create energy and distance samples
let totalEnergyBurnedSample = HKQuantitySample(type: HKQuantityType.activeEnergyBurned(),
quantity: totalEnergyBurned,
start: workoutStartDate!,
end: workoutEndDate!)
// Add samples to workout
healthStore.add([totalEnergyBurnedSample], to: workout) { (success: Bool, error: Error?) in
if success {
// Samples have been added
}
}
}
Let me know if any questions or information needed, thanks!
As a part of my research and development,I discovered how the pairing of the iPhone and the Apple Watch has the potential to be useful.
In this case, tapping on a button on the Watch app will send text on the iPhone.
To make a simple demo of this functionality, place a button on the WatchKit interface and a label on the iOS app’s storyboard.
Now, hook up the button to the WatchKit Interface Controller as an IBAction in order to respond to button tap events. Also hook up the Label to the UI View Controller as an IBOutlet.
In the Interface Controller, we make up a string variable to send to the label and in the button’s IBAction method, make a dictionary that includes the string variable you made. This dictionary is what is passed to the iPhone app.
class InterfaceController: WKInterfaceController {
Var str: String = "Hello Phone"
#IBAction func button() {
let dict: Dictionary = ["message": str]
}
Use the following method to send the dictionary to the iPhone.
WKInterfaceController.openParentApplication(dict, reply: {(reply, error) -> void in
print("Reply receive from iPhone app")
})
In the AppDelegate of the iOS app, add the following application method. This is what will handle the previous methods communication from the Watch. Also we can use a notification to notify a view controller that data has been received and to pass it along.
func application(application: UIApplication, handleWatchkitExtensionRequest userInfo: [NSObject : AnyObject]?, reply:(([NSObject : AnyObject]!) {
NSNotificationCenter.defaultCenter().postNotificationName("WatchKitReq", object: userInfo)
}
Finally in the view controller, make a listener for the notification that will update the label’s text to the string that was sent with the data.
class ViewController: UIViewController {
#IBOutlet weak var label: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector("handleWatchKitNotification:"), name: "WatchKitReq", object: nil)
}
func handleWatchKitNotification(notification: NSNotification) {
if let userInfo = notification.object as? [String : String] {
label.text = userInfo["message"]
}
}
Hope this will help you to understand. For more concerns you can look on this,
Delegate Method
To do this you have to create an App Group which is essentially a space which both apps can use. It was brought in with the exetension framework in iOS8 so apps can communicate with their Today widgets, or custom keyboards, and amongst other applications.
ADD CAPABILITIES
The first thing we have to do is add the app group capability to both our iPhone and Watch Watch Extension targets.
To do this open up the project settings (blue icon at the top of the list of files) and select the iPhone target. You will need to select the “capabilities” tab at the top of the page and scroll down to turn on app groups.
This requires a connected developer profile, and will take a while to enable. You’ll need to do the same steps to switch on app groups for the watch kit extension also.
Next you need to ensure that the app group string is an identifier string you want and that makes sense for your app, it must start with the word group or it complains. You can also add multiple groups if you wish. Whatever you pick they must be enabled with a blue tick (again this might take a while) and are exactly the same for both the iPhone and Watch extension targets!
To use App Groups, it’s not that different or difficult to use than NSUserDefaults:
var userDefaults = NSUserDefaults(suiteName: "group.com.example.My-App")
userDefaults.setObject(true, forKey: "isDarkModeEnabled")
userDefaults.synchronize()
The only differences here are how NSUserDefaults is instantiated and calling synchronize at the end. You feed it the container ID to the constructor parameter called “suiteName”, then call “synchronize()”, and your data flies to the cloud for other apps and devices to consume.
Taking It to the Next Level
You can take this one step further by creating a class for your app and abstract the underlying storage for your properties. Here’s an example:
public class ConfigurationModel: NSObject {
public static let storageKey = "group.com.example.My-App"
public let userStorage = NSUserDefaults(suiteName: storageKey)
public var isDarkModeEnabled: Bool {
get {
// Get setting from storage or default
if userStorage?.objectForKey("isDarkModeEnabled") == nil {
userStorage?.setObject(false, forKey: "isDarkModeEnabled")
userStorage?.synchronize()
}
return userStorage?.objectForKey("isDarkModeEnabled")
}
set {
// Set new value in storage
userStorage?.setObject(newValue, forKey: "isDarkModeEnabled")
userStorage?.synchronize()
}
}
At the top of the class, I am declaring my group container ID and creating the NSUserDefault object out of it. Then my properties for the class have getters and setters to store the data to the App Group. If the key doesn’t exist, it creates it with a default value and synchronizes it. Using the class from this point forward is simple:
var configModel = ConfigurationModel()
configModel.isDarkModeEnabled = true
This property is stored in the cloud! Everything is abstracted away for you. You don’t have to be bothered about storing and synchronizing it into the App Group. It’s all done automatically for you in the getters and setters!
Hope, this will help you to understand how you can share data between the iPhone and Apple Watch app.
Here is my AppDelegate.swift. I implement the applicationShouldTerminate protocol from NSApplication. Which answer I give depends on the status of is.Started in the mainWindowController. (This is the SpeakLine example from Cocoa Programming for OS X: The Big Nerd Ranch Guide 5/e—I'm trying to take the example one step further and keep the program from being allowed to quit while the talking is going on.)
What I want to do is change TerminateReply.TerminateCancel to TerminateReply.TermianteLater and then send NSApplication the replyToApplicationShouldTerminate(true) signal when the talking is done. As it stands now in the MainControllerWindow.swift class I have a function set up to handle state changes in the Speech Synthesizer and that's where I want to call it.
import Cocoa
#NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
var mainWindowController: MainWindowController?
func applicationDidFinishLaunching(aNotification: NSNotification) {
let mainWindowController = MainWindowController()
mainWindowController.showWindow(self)
self.mainWindowController = mainWindowController
}
func applicationShouldTerminate(sender: NSApplication) -> NSApplicationTerminateReply {
if (mainWindowController!.isStarted) {
return NSApplicationTerminateReply.TerminateCancel
} else {
return NSApplicationTerminateReply.TerminateNow
}
}
}
The trouble is, when I put it here, I get an error.
var isStarted: Bool = false {
didSet {
updateButtons()
NSApplication.replyToApplicationShouldTerminate(true)
}
}
it tells me I can't use a bool. It also tells me I can't use an Objective C bool when I try to put YES. How do I tell NSApplication it's OK to quit now?
I believe you should change
NSApplication.replyToApplicationShouldTerminate(true)
to
NSApplication.sharedApplication().replyToApplicationShouldTerminate(true)
since replyToApplicationShouldTerminate is a instance method rather then a class method.
my tow cents for swift 5.x:
NSApplication.shared.reply(toApplicationShouldTerminate: true)