Swift - Play a Sound - Versionsgeschichte

134.3.86.14 am 29. Dezember 2022 um 17:50 Uhr

2022-12-29T17:50:48Z

134.3.86.14: /* Xylophone */

2022-12-29T17:48:49Z

Xylophone

134.3.86.14: /* Beispiele */

2022-12-29T17:44:06Z

Beispiele

134.3.86.14: Die Seite wurde neu angelegt: „== Beispiele == === Xylophone === // // ViewController.swift // Xylophone // // Created by Angela Yu on 28/06/2019. // Copyr…“

2022-12-29T17:40:40Z

Die Seite wurde neu angelegt: „== Beispiele == === Xylophone === <syntaxhighlight lang="Swift"> // // ViewController.swift // Xylophone // // Created by Angela Yu on 28/06/2019. // Copyr…“

Neue Seite

== Beispiele ==
=== Xylophone ===
<syntaxhighlight lang="Swift">
//
// ViewController.swift
// Xylophone
//
// Created by Angela Yu on 28/06/2019.
// Copyright © 2019 The App Brewery. All rights reserved.
//

import UIKit
import AVFoundation
import Dispatch

class ViewController: UIViewController {

override func viewDidLoad() {
super.viewDidLoad()
}

@IBAction func keyPressed(_ sender: UIButton) {

let soundName:String = sender.currentTitle!
// Note: currentTitle is defined as type optional string,
// meaning there are cases when no title exists (value = nil)
// by adding ! we say "don't worry - we checked that the input
// is guaranteed a string. Another way to be safe would be a guard:
// guard let soundName:String = sender.currentTitle else {return}
// a guard checks the value and would go to the else function
// and therefore return in this case if the value is nil

self.playAudioFile(soundName:soundName)

sender.alpha = 0.5

// Delay code execution for 0.2 seconds
DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
// Code to be executed after the delay
sender.alpha = 1.0
}
}

var audioPlayer: AVAudioPlayer?

func playAudioFile(soundName:String) {
guard let url = Bundle.main.url(forResource: soundName, withExtension: "wav") else { return }

do {
// Change defaults to category playback (play sound even if phone is silenced)
try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback)
try AVAudioSession.sharedInstance().setActive(true)

audioPlayer = try AVAudioPlayer(
contentsOf: url,
fileTypeHint: AVFileType.wav.rawValue
)

guard let audioPlayer = audioPlayer else { return }
audioPlayer.play()

} catch let error {
print(error.localizedDescription)
}
}

}

</syntaxhighlight>

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		+	== Links ==
		+	[[Swift - Snippets]]
	== Beispiele ==		== Beispiele ==
	=== Xylophone ===		=== Xylophone ===

@@ Zeile 4: / Zeile 4: @@
 Wenn der User klickt, lesen wir das Label aus und spielen über die AVPAudioPlayer Objekt den Sound ab.
 <syntaxhighlight lang="Swift">
 //

@@ Zeile 1: / Zeile 1: @@
 == Beispiele ==
 === Xylophone ===
 <syntaxhighlight lang="Swift">
 //