从请求中检索UNNotificationRequest声音名称

Question

我设置了一个自定义声音的通知，如下所示：

var soundNames = ["Default", "Alert1", "Alert2", "Alert3", "Alert4", "Alert5", "Alert6", "Alert7", "Alert8", "Alert9", "Alert10"]

func addNotification(title: String, timeInt: TimeInterval, image: Data?, soundName: String?) {

let content = UNMutableNotificationContent()
content.title = title

    content.sound = UNNotificationSound(named: UNNotificationSoundName(rawValue: "\(soundName!).caf"))

    var trigger: UNTimeIntervalNotificationTrigger

    trigger = UNTimeIntervalNotificationTrigger(timeInterval: timeInt, repeats: true)

// choose a random identifier
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)

// add our notification request
UNUserNotificationCenter.current().add(request)

saveConceptCard(id: request.identifier, title: title, image: image)

}

现在，我想要获取在从id检索特定通知请求时使用的自定义声音的名称。

 var notification: UNNotificationRequest

我尝试这样获取声音名称：

 let sound = notification.content.sound!.debugDescription

但这会返回：

 <UNNotificationSound: 0x2822419d0>

有没有办法从代码中获取文件名？

Answer 1

您必须使用AVFoundation框架将文本转换为语音

当您推送通知时，您还必须推送AVSpeechSynthesizer

下面是如何设置它的：

let utterance = AVSpeechUtterance(string: "Hello world")
utterance.voice = AVSpeechSynthesisVoice(language: "en-GB")
utterance.rate = 0.1 

let synthesizer = AVSpeechSynthesizer()

下面是语音操作：

synthesizer.speak(utterance)