无法停止背景音乐(Swift 3，Xcode 8)
无法停止背景音乐(Swift 3，Xcode 8)
提问于 2017-07-01 01:47:38
我让一个AVAudioPlayer实例在视图加载时运行。从另一个ViewController，我有一个停止音乐的UISwitch。我可以从交换机接收Bool，并看到它在console中调用正确的函数，但我无法让音乐停止播放。我尝试过停止、暂停和改变音量，但都无济于事。当应用程序关闭(双击主页并向上滑动)并且关闭开关状态时，音乐将不会播放。如果您将开关打开，音乐将会播放，但不会停止。
代码：
var player:AVAudioPlayer = AVAudioPlayer()
let optionDefaults = UserDefaults.standard
override func viewDidLoad() {
super.viewDidLoad()
do{
let audioPath = Bundle.main.path(forResource: "backgroundmusic", ofType: "wav")
try player = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPath!) as URL)
player.volume = 0.2
if optionDefaults.value(forKey: "musicOn") != nil {
let musicOn: Bool = optionDefaults.value(forKey: "musicOn") as! Bool
if musicOn == false {
print("********** Music is off **********")
player.stop()
}
else {
print("********** Music is On **********")
player.play()
}
}
} catch {
print("AVPlayer did not initialize")
}
player.numberOfLoops = -1
}*开关代码*
let optionDefaults = UserDefaults.standard
@IBOutlet weak var musicOnOff: UISwitch!
var musicOn : Bool = true
@IBAction func switchToGame(sender: UIButton) {
if musicOnOff.isOn{
musicOn = true
optionDefaults.set(musicOn, forKey: "musicOn")
}
if musicOnOff.isOn == false{
musicOn = false
optionDefaults.set(musicOn, forKey: "musicOn")
}}
override func viewDidLoad() {
super.viewDidLoad()
if optionDefaults.value(forKey: "musicOn") != nil {
let musicOn: Bool = optionDefaults.value(forKey: "musicOn") as! Bool
if musicOn == false {
musicOnOff.isOn = false
}
else{
musicOnOff.isOn = true
}
}}回答 1
Stack Overflow用户
发布于 2017-07-02 00:32:08
你只在视图加载时播放音乐你想在切换切换时停止并播放只需调用palyOrStopMusic completes.If on切换切换操作
var player:AVAudioPlayer = AVAudioPlayer()
let optionDefaults = UserDefaults.standard
override func viewDidLoad() {
super.viewDidLoad()
playOrStopMusic()
}
func playOrStopMusic(){
do{
let audioPath = Bundle.main.path(forResource: "backgroundmusic", ofType: "wav")
try player = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPath!) as URL)
player.volume = 0.2
if optionDefaults.value(forKey: "musicOn") != nil {
let musicOn: Bool = optionDefaults.value(forKey: "musicOn") as! Bool
if musicOn == false {
print("********** Music is off **********")
player.stop()
}
else {
print("********** Music is On **********")
player.play()
}
}
} catch {
print("AVPlayer did not initialize")
}
player.numberOfLoops = -1
}*开关代码*
let optionDefaults = UserDefaults.standard
@IBOutlet weak var musicOnOff: UISwitch!
var musicOn : Bool = true
@IBAction func switchToGame(sender: UIButton) {
if musicOnOff.isOn{
musicOn = true
optionDefaults.set(musicOn, forKey: "musicOn")
}else{
musicOn = false
optionDefaults.set(musicOn, forKey: "musicOn")
}
playOrStopMusic()
}
override func viewDidLoad() {
super.viewDidLoad()
playOrStopMusic()
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/44852271
复制相关文章
相似问题
腾讯云开发者
Copyright © 2013 - 2026 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 
粤公网安备44030502008569号
腾讯云计算（北京）有限责任公司 京ICP证150476号 | 京ICP备11018762号