非主捆绑文件作为警报声音

Question

我希望我错了，但我认为这不可能。在本地和推送通知编程指南中，在“准备自定义警报声音”下它说“声音文件必须在客户端应用程序的主包中”。

如果您无法写入主包，那么如何让用户生成的录音（例如，使用 AVAudioRecorder）作为警报声音播放？

一方面这似乎不可能，但另一方面我认为那里有应用程序可以做到这一点（我会寻找那些）。

Answer 1

我通过将系统声音文件复制到 ~/Library/Sounds 目录并将其命名为 notification.caf 来解决此问题。服务器警报负载将此指定为要播放的声音的名称。每当用户选择另一个声音时，该声音将被复制到同一文件夹并覆盖旧声音。

有效载荷：

{
"aps": {
    "sound": "notification.caf"
}

}

// get the list of system sounds, there are other sounds in folders beside /New
let soundPath = "/System/Library/Audio/UISounds/New"
func getSoundList() -> [String] {
    var result:[String] = []
    let fileManager = NSFileManager.defaultManager()
    let enumerator:NSDirectoryEnumerator = fileManager.enumeratorAtPath(soundPath)!
    for url in enumerator.allObjects {
        let string = url as! String
        let newString = string.stringByReplacingOccurrencesOfString(".caf", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)
        result.append(newString)
    }
    return result
}

// copy sound file to /Library/Sounds directory, it will be auto detect and played when a push notification arrive
class func copyFileToDirectory(fromPath:String, fileName:String) {
    let fileManager = NSFileManager.defaultManager()

    do {
        let libraryDir = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.LibraryDirectory, NSSearchPathDomainMask.UserDomainMask, true)
        let directoryPath = "\(libraryDir.first!)/Sounds"
        try fileManager.createDirectoryAtPath(directoryPath, withIntermediateDirectories: true, attributes: nil)

        let systemSoundPath = "\(fromPath)/\(fileName)"
        let notificationSoundPath = "\(directoryPath)/notification.caf"

        let fileExist = fileManager.fileExistsAtPath(notificationSoundPath)
        if (fileExist) {
            try fileManager.removeItemAtPath(notificationSoundPath)
        }
        try fileManager.copyItemAtPath(systemSoundPath, toPath: notificationSoundPath)
    }
    catch let error as NSError {
        print("Error: \(error)")
    }
}

虽然推送通知的声音可能有问题，但我必须重启手机才能可靠地播放每个通知。