先添加UNNotificationServiceExtension。File – new – targrt – UNNotificationServiceExtension
项目和UNNotificationServiceExtension，都要添加appGroups，GroupIdentifier要一致,一般是”group.自己项目的BundleIdentifier”，不一致会有问题。
添加appGroups的缘由是：共享一个group后，可以合成播报语音，然后存到group中，之后在UNNotificationServiceExtension中可以读取到合成后的语音文件。
UNNotificationServiceExtension的Minimum Deployment最低版本号要改一下，默认是最高iOS系统版本。会出现低版本真机调试不可用的情况
网上的实现方式有3种，我用的是第一种。
关于音频的拼接，如果用Data数据流的方式拼接，会出现只有第一段音频声音的问题，所有还是要用AVAssetExportSession来拼接。
1种是修改系统的通知声音，可以实现效果，但是由于音量不能调节，声音太小。如果对音量没有要求的，可以用这个方案，而且体验更好。
//自定义通知声音
override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
self.contentHandler = contentHandler
bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
let keyS = bestAttemptContent?.userInfo["key"] as? String
if keyS == "sound" {
let valueS = bestAttemptContent?.userInfo["value"] as? String//金额
let formatter = NumberFormatter()
formatter.locale = Locale(identifier: "zh-CN")
formatter.allowsFloats = true
let strF: CGFloat = formatter.number(from: valueS ?? "0") as? CGFloat ?? 0.0
formatter.numberStyle = . spellOut
let resultS: String = formatter.string(from: NSNumber (value: strF)) ?? ""
let resultSA: Array<String> = resultS.map { String($0) }
var finalA: Array<String> = ["钱响", "哥小兔到账"]
finalA.append(contentsOf: resultSA)
finalA.append("元")
mergeAVAsset(with: finalA) { (name,path) in
if let bestAttemptContent = self.bestAttemptContent {
let temp3 = UNNotificationSoundName(rawValue: name ?? "")
let temp4 = UNNotificationSound.init(named: temp3)
bestAttemptContent.sound = temp4
contentHandler(bestAttemptContent)
}
}
} else {
if let bestAttemptContent = self.bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
}
第2种是：AVAudioPlayer播放语音，瑕疵点就是，推送横幅要在语音播报结束后出现，不然就会和AVAudioPlayer语音播报冲突。(功能实现了，但是打包上传有问题，这个当打包上传到Appstore上就会出现错误了，提示说UNNotificationServiceExtension中的UIBackgroundModes的Audio这个字段是非法的，如果是企业分发模式可以添加。要上架审核的话，是无法添加的)所以这个方法只适合企业分发用，上架的话暂时还是用上面的第1方法。
UNNotificationServiceExtension 要添加一下权限，否则AVAudioPlayer不能在UNNotificationServiceExtension中播放
import UserNotifications
import MediaPlayer
class NotificationService: UNNotificationServiceExtension {
var contentHandler: ((UNNotificationContent) -> Void)?
var bestAttemptContent: UNMutableNotificationContent?
var audioPlayer: AVAudioPlayer?
override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
self.contentHandler = contentHandler
bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
let keyS = bestAttemptContent?.userInfo["type"] as? Int
if keyS == 2 {
let valueS = bestAttemptContent?.userInfo["amount"] as? String//金额
let formatter = NumberFormatter()
formatter.locale = Locale(identifier: "zh-CN")
formatter.allowsFloats = true
let strF: CGFloat = formatter.number(from: valueS ?? "0") as? CGFloat ?? 0.0
formatter.numberStyle = . spellOut
let resultS: String = formatter.string(from: NSNumber (value: strF)) ?? ""
let resultSA: Array<String> = resultS.map { String($0) }
var finalA: Array<String> = ["钱响", "哥小兔到账"]
finalA.append(contentsOf: resultSA)
finalA.append("元")
mergeAVAsset(with: finalA) { (name,path) in
// NSLog("合并后的音频路径: (path)")
let audioSession = AVAudioSession.sharedInstance()
do {//配置音频，可以在后台、静音情况下播放
try audioSession.setCategory(.playback, mode:.default, options: [.mixWithOthers])
try audioSession.setActive(true)
} catch {
print("Error configuring audio session: (error)")
}
self.audioPlayer = try? AVAudioPlayer(contentsOf: path ?? URL(fileURLWithPath: ""))
self.audioPlayer?.delegate = self
self.audioPlayer?.play()
}
} else {
if let bestAttemptContent = self.bestAttemptContent {
// Modify the notification content here...
// bestAttemptContent.title = "(bestAttemptContent.title) [modified]"
contentHandler(bestAttemptContent)
}
}
}
override func serviceExtensionTimeWillExpire() {
// Called just before the extension will be terminated by the system.
// Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
if let contentHandler = contentHandler, let bestAttemptContent = bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
//合成要播报的语音
func mergeAVAsset(with sourcePathArr: [String], rate: Double = 1.0, completed: @escaping (_ soundName: String?,_ soundsFileURL: URL?) -> Void) {
// 创建音频轨道, 并获取多个音频素材的轨道
let composition = AVMutableComposition()
// 音频插入的开始时间, 用于记录每次添加音频文件的开始时间
var beginTime = CMTime.zero
for audioFilePath in sourcePathArr {
// 获取音频素材
let audioFileURL: String = Bundle.main.path(forResource: audioFilePath, ofType: "mp3") ?? ""
guard let audioAsset = AVURLAsset(url: URL(fileURLWithPath: audioFileURL)) as AVAsset? else { continue }
// 音频轨道
let audioTrack = composition.addMutableTrack(withMediaType: .audio, preferredTrackID: kCMPersistentTrackID_Invalid)
// 获取音频素材轨道
guard let audioAssetTrack = audioAsset.tracks(withMediaType: .audio).first else { continue }
// 音频合并 - 插入音轨文件
try? audioTrack?.insertTimeRange(CMTimeRangeMake(start: CMTime.zero, duration: audioAsset.duration), of: audioAssetTrack, at: beginTime)
// 记录尾部时间
beginTime = CMTimeAdd(beginTime, audioAsset.duration)
}
let finalTimeValue = composition.duration.value * Int64(10 * rate)
let finalTimeScale = composition.duration.timescale * 10
composition.scaleTimeRange(.init(start: .zero, end: composition.duration), toDuration: .init(value: finalTimeValue, timescale: finalTimeScale))
let groupURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.自己项目的BundleIdentifier")
//建立文件夹
let soundsURL = groupURL?.appendingPathComponent("Library/", isDirectory: true)
let soundsURL2 = groupURL?.appendingPathComponent("Library/Sounds/", isDirectory: true)
do {
//建立文件夹
if !FileManager.default.fileExists(atPath: (soundsURL?.path ?? "")) {
try FileManager.default.createDirectory(atPath: (soundsURL?.path ?? ""), withIntermediateDirectories: true, attributes: nil)
}
//建立文件夹
if !FileManager.default.fileExists(atPath: (soundsURL2?.path ?? "")) {
try FileManager.default.createDirectory(atPath: (soundsURL2?.path ?? ""), withIntermediateDirectories: true, attributes: nil)
}
} catch {
print("Error 建立文件夹: (error)")
}
// 新建文件名，如果存在就删除旧的
let soundName = "sound.m4a"
let outPutFilePath = "Library/Sounds/" + soundName
let soundsFileURL = groupURL?.appendingPathComponent(outPutFilePath, isDirectory: false)
if FileManager.default.fileExists(atPath: (soundsFileURL?.path ?? "")) {
do {
try FileManager.default.removeItem(atPath:(soundsFileURL?.path ?? ""))
} catch {
print("Error 新建文件名，如果存在就删除旧的: (error)")
}
}
// 导出合并后的音频文件
guard let session = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetAppleM4A) else { completed(nil, nil); return }
// 音频文件输出
session.outputURL = soundsFileURL
session.outputFileType = AVFileType.m4a // 与上述的`preset`相对应
session.shouldOptimizeForNetworkUse = true // 优化网络
// session.audioMix = videoAudioMixTools
session.exportAsynchronously {
if session.status == .completed {
// print("合并成功 ----(soundsFileURL)")
completed(soundName, soundsFileURL)
} else {
// 其他情况, 具体请看这里`AVAssetExportSessionStatus`.
// print("合并失败 ----(session.status.rawValue)")
// print("合并失败 ----(session.error)")
completed(nil, nil)
}
}
}
}
extension NotificationService: AVAudioPlayerDelegate {
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
//播放结束，执行contentHandler，结束这个通知
if (contentHandler != nil) && (bestAttemptContent != nil) {
bestAttemptContent?.sound = .none//由于有语音播报了，这里把系统通知的声音关了
contentHandler!(bestAttemptContent!)
}
}
}
像 哥小兔到账.mp3、 元.mp3、 万.mp3 这些语音文件，可以去ai语音合成，类似的有：百度、科大讯飞、标贝等
语音生成工具：标贝悦读、百度、科大讯飞
第三种
经过查找，大致率支付宝、微信使用的使用voip模式，通过查找微信与支付宝的ipa，ipa中配置的文件都UIBackgroundModes(后台模式)包含voip。
所以大致率支付宝与微信都使用的是Voip PushKit实现的收款的语音播报功能
之后也会调查下Voip PushKit实现的收款的语音播报功能，PushKit和极光推送还不太一样。持续关注中。。。
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