我要做的是在我的应用程序中有一个设置页面,当点击一个开关(其原始状态为关闭)时,它将使整个应用程序静音。到目前为止,我的代码可以做的只是静音当前视图并且它工作得很好,直到我转到我的主视图然后音乐仍在播放与此相关联,当我转回设置页面时,静音开关返回到原来的关闭状态,音乐再次播放。我想知道如何修复我的代码,以便在打开时它可以消除所有噪音。这是我的代码,感谢您阅读和帮助:
import UIKit
import AVFoundation
var songs = ""
var backgroundMusicPlayer: AVAudioPlayer!
func playBackgroundMusic(filename: String) {
let url = NSBundle.mainBundle().URLForResource(
filename, withExtension: nil)
if (url == nil) {
println("Could not find file: \(filename)")
return
}
var error: NSError? = nil
backgroundMusicPlayer =
AVAudioPlayer(contentsOfURL: url, error: &error)
if backgroundMusicPlayer == nil {
println("Could not create audio player: \(error!)")
return
}
backgroundMusicPlayer.numberOfLoops = -1
backgroundMusicPlayer.prepareToPlay()
backgroundMusicPlayer.play()
}
class settingsView: UIViewController {
@IBOutlet weak var mySwitch: UISwitch!
@IBAction func switchPressed(sender: AnyObject) {
playBackgroundMusic(songs)
if mySwitch.on {
backgroundMusicPlayer.pause()
} else {
backgroundMusicPlayer.play()
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do view setup here.
songs = "settingsBackground.mp3"
switchPressed(self)
}
}
答案 0 :(得分:3)
你可以这样做:
<强> MainViewController.swift 强>
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do view setup here.
let status = NSUserDefaults().stringForKey("playerStatus")
if status == "Off"{
if (backgroundMusicPlayer?.playing != nil){
backgroundMusicPlayer?.stop()
}
}else{
songs = "1.mp3"
playBackgroundMusic(songs)
}
}
}
<强> settingsView.swift 强>
import UIKit
class settingsView: UIViewController {
@IBOutlet weak var mySwitch: UISwitch!
@IBAction func switchPressed(sender: AnyObject) {
if mySwitch.on {
NSUserDefaults().setObject("on", forKey: "playerStatus")
playBackgroundMusic(songs)
} else {
NSUserDefaults().setObject("Off", forKey: "playerStatus")
backgroundMusicPlayer!.stop()
}
}
override func viewDidLoad() {
super.viewDidLoad()
let status = NSUserDefaults().stringForKey("playerStatus")
if status == "Off" {
mySwitch.setOn(false, animated: false)
}
}
}
以下是完整的工作项目:https://github.com/DharmeshKheni/Switch-with-AudioPlayer