Using Xcode 8, Swift 3 and Interface Builder with Storyboards and a very basic view controller featuring only a button (Play) and a slider (volume).
I'm trying to use my NSSlider while pressing a button at the same time. For instance, I need to be able to keep pressing "Play" while slowly lowering the volume. What happens instead is that only one button can be in use at a time. So, as long as I am pressing "Play" using the return key, I can't adjust the volume and vice versa.
In this example, the Play button is triggered by the "return" key.
Here is the code in ViewController.swift. This is just an example app I created quickly to study the problem.
Is there an Interface Builder setting on the NSSLider that I am missing, or can I do something in my code to achieve what I am trying to do?
import Cocoa
import AVFoundation
class ViewController: NSViewController {
var audioPlayer = AVAudioPlayer()
var sliderValue: Float = 0
@IBOutlet weak var volumeSliderOutlet: NSSlider!
override func viewDidLoad() {
super.viewDidLoad()
do{
audioPlayer = try AVAudioPlayer(contentsOf: URL.init(fileURLWithPath: Bundle.main.path(forResource: "bell ding", ofType: "wav")!))
}
catch {
print(error)
}
audioPlayer.prepareToPlay()
// Do any additional setup after loading the view.
}
@IBAction func playButtonAction(_ sender: NSButton) {
if audioPlayer.isPlaying {
audioPlayer.currentTime = 0.0
audioPlayer.play()
} else {
audioPlayer.prepareToPlay()
audioPlayer.play()
}
}
@IBAction func volumeSliderAction(_ sender: NSSlider) {
if audioPlayer.isPlaying {
sliderValue = self.volumeSliderOutlet.floatValue
audioPlayer.volume = sliderValue
} else {
return
}
}
override var representedObject: Any? {
didSet {
// Update the view, if already loaded.
}
}
}
I've also tried this, based on advice from @inspector_60, but it doesn't work either. Still can't handle the slider while continuing to press the shortcut key for the button "return".
override func keyDown(with event: NSEvent) {
if (event.keyCode == 36) {
self.playButtonAction(nil)
}
else {
return
}
}
func playButtonAction(_ sender: NSButton?) {
if audioPlayer.isPlaying {
audioPlayer.currentTime = 0.0
audioPlayer.play()
} else {
audioPlayer.prepareToPlay()
audioPlayer.play()
}
}
