I am writing an app in Swift on OS X. Is there a way to get the current playing audio in iTunes? I would like to get details such as title, artist, etc.
What I've found already:
Here is an Objective C example, but not all those methods are available with Swift.
This example uses AppleScript, which I might have to do. But I'd rather use Swift if possible.
Here's a simple example how to get the properties from the current track:
Tested on (El Capitan v10.11.5, iTunes 12.4 and Xcode 7.3).
import Cocoa
import ScriptingBridge
#objc protocol iTunesApplication {
optional func currentTrack()-> AnyObject
optional var properties: NSDictionary {get}
//if you need another object or method from the iTunes.h, you must add it here
}
#NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
func applicationDidFinishLaunching(aNotification: NSNotification) {
let iTunesApp: AnyObject = SBApplication(bundleIdentifier: "com.apple.iTunes")!
let trackDict = iTunesApp.currentTrack!().properties as Dictionary
if (trackDict["name"] != nil) {// if nil then no current track
print(trackDict["name"]!) // print the title
print(trackDict["artist"]!)
print(trackDict["album"]!)
print(trackDict["playedCount"]!)
// print(trackDict) // print the dictionary
}
}
}
Related
I am trying to add a function applicationWillTerminate() in my independent watchOS app. With searching from the internet, I found that you can find application life cycle function delegates with using WKExtensionDelegate. But I am unable to find any function or method to detect that app is going to kill. So my main concern is to find a method that will called before independent watchOS app is terminated.
import Foundation
import SwiftUI
import WatchKit
final class ExtensionDelegate: NSObject, ObservableObject, WKExtensionDelegate {
func applicationDidFinishLaunching() {
NSLog("App launched")
}
func applicationWillTerminate() {
NSLog("App will terminate")
// trying to call this function but is not declared WKExtensionDelegate
}
func applicationDidEnterBackground() {
NSLog("App deactivated")
NotificationCenter.default.post(name: .appDeactivated, object: nil)
}
}
I'm new to swift development and building a simple app for the apple watch. I'd like a short sound to play when a button is tapped. Is this possible?
From what I understand the best way to do this is with AVFoundation and AVAudioPlayer. There seem to have been a lot of updates for this in the last few releases and I'm finding conflicting advice. Based on a few tutorials I've put this simple test together, but I'm getting a "Thread 1:Fatal error: Unexpectedly found nil when unwrapping an Optional value" Here is my code:
import WatchKit
import Foundation
import AVFoundation
var dogSound = AVAudioPlayer()
class InterfaceController: WKInterfaceController {
override func awake(withContext context: Any?) {
super.awake(withContext: context)
// Configure interface objects here.
}
override func willActivate() {
// This method is called when watch view controller is about to be visible to user
super.willActivate()
}
override func didDeactivate() {
// This method is called when watch view controller is no longer visible
super.didDeactivate()
}
#IBAction func playTapped() {
let path = Bundle.main.path(forResource: "Dog", ofType: ".mp3")!
let url = URL(fileURLWithPath: path)
do {
dogSound = try AVAudioPlayer(contentsOf: url)
dogSound.play()
} catch {
//couldn't load file :(
}
}
}
My audio file is an mp3 named Dog in the Assets.xcassets folder in WatchKit Extension and I have added AVFoundation.framework to the Link Binary with Libraries
What am I doing wrong and is there a tutorial for the right way to implement this? Thanks a lot!
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()
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.
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)