xcode 如何使用 swift 2.0 播放背景音乐？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/32882737/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to play background music with swift 2.0?
提问by H Sefein
HI I am new to swift and ios development. My code was working up until I've updated to Swift 2.0, I've used swift migrating tool, but I still can't figure out how to sort and fix my code. Please help!
嗨，我是 swift 和 ios 开发的新手。我的代码一直在运行，直到我更新到 Swift 2.0，我已经使用了 swift 迁移工具，但我仍然不知道如何对我的代码进行排序和修复。请帮忙！
import AVFoundation
var backgroundMusicP: AVAudioPlayer!
func playBackgroundMusic(filename: String) {
let url = NSBundle.mainBundle().URLForResource(
filename, withExtension: nil)
if (url == nil) {
print("Could not find file: \(filename)")
return
}
var error: NSError?
do {
backgroundMusicP = try AVAudioPlayer(contentsOfURL: url!)
} catch {
backgroundMusicP == nil
}
if backgroundMusicP == nil {
print("Could not create audio player: \(error)")
return
}
backgroundMusicP.numberOfLoops = -1
backgroundMusicP.prepareToPlay()
backgroundMusicP.play()
}
回答by Dharmesh Kheni
Updated function for swift 2.0:
Swift 2.0 的更新功能：
import AVFoundation
var backgroundMusicPlayer = AVAudioPlayer()
func playBackgroundMusic(filename: String) {
let url = NSBundle.mainBundle().URLForResource(filename, withExtension: nil)
guard let newURL = url else {
print("Could not find file: \(filename)")
return
}
do {
backgroundMusicPlayer = try AVAudioPlayer(contentsOfURL: newURL)
backgroundMusicPlayer.numberOfLoops = -1
backgroundMusicPlayer.prepareToPlay()
backgroundMusicPlayer.play()
} catch let error as NSError {
print(error.description)
}
}
Use it this way:
以这种方式使用它：
playBackgroundMusic("yourFileName.mp3")
回答by Tapas Pal
You can enable a session also for background playing capability.
您还可以为后台播放功能启用会话。
func enableBackgroundPlaying(_ enable: Bool) throws {
do {
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
do {
try AVAudioSession.sharedInstance().setActive(enable)
} catch {
throw error
}
} catch {
throw error
}
}
