ios - 在 XCODE 8 Swift 3 中为倒数计时器添加音调
<p><p>我是编码新手。我正在尝试学习 iOS 开发，我创建了一个简单的倒数计时器，它使用 slider 来选择以秒为单位的时间量。我想为倒计时的最后 9 秒添加一个音调。我知道如何添加音频文件，但我“不知道”如何在计时器的最后 9 秒添加倒计时音。</p>
<pre><code>@IBAction func startBtnTapped(_ sender: Any) {
timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(ViewController.counter), userInfo: nil, repeats: true)
SoundPlayer4.play()
//Hide Start and Slider Buttons
startBtn.isHidden = true
sliderCtrl.isHidden = true
stopBtn.isHidden = false
}
@IBAction func stopBtnTapped(_ sender: Any) {
timer.invalidate()
seconds = 180
sliderCtrl.setValue(180, animated: true)
timerLbl.text = "180"
SoundPlayer3.play()
//Show Start and Slider Buttons
sliderCtrl.isHidden = false
startBtn.isHidden = false
stopBtn.isHidden = true
}
@IBAction func sliderCrtlUsed(_ sender: UISlider) {
seconds = Int(sender.value)
timerLbl.text = String(seconds)
}
func counter(){
seconds -= 1
timerLbl.text = String(seconds)
if (seconds == 0){
timer.invalidate()
//Show Start and Slider Buttons
startBtn.isHidden = false
sliderCtrl.isHidden = false
stopBtn.isHidden = true
//Play Audio
SoundPlayer1.play()
}
}
</code></pre>
<p>那么任何人都可以帮我为我的项目添加倒计时音吗？
谢谢</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>将此代码放入<code>counter</code>函数中:</p>
<pre><code>if seconds < 10 {
var AudioURL = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("Dog bark", ofType: "mp3")!)
var AudioPlayer = AVAudioPlayer()
do {
AudioPlayer = try AVAudioPlayer(contentsOfURL: AudioURL)
} catch _ as NSError {
fatalError()
}
AudioPlayer.play()
}
</code></pre>
<p>然后把文件放在这里:</p>
<p> <a href="/image/sK6ag.png" rel="noreferrer noopener nofollow"><img src="/image/sK6ag.png" alt="enter image description here"/></a> </p>
<p>就是这样!</p>
<blockquote>
<p>You can read more on this question <a href="https://stackoverflow.com/questions/32036146/how-to-play-a-sound-in-swift-2-and-3" rel="noreferrer noopener nofollow">here</a>.</p>
</blockquote></p>
<p style="font-size: 20px;">关于ios - 在 XCODE 8 Swift 3 中为倒数计时器添加音调，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/42216562/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/42216562/
</a>
</p>
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