ios（高于ios 12 不确定是否可行，做的时候最新的就是12）
基于极光推送服务和Notification Service Extension实现在APP后台时，收到极光的推送消息进而播报
前期准备：
ios极光推送基础知识;
Notification Service Extension
首先需要说明的是，后台播报的方案，限制于Notification Service Extension是ios10的新特性，所以只在ios10及其以上版本有效
首先在应用内添加Notification Service Extension：
如果引用了音频文件，也需要在应用中导入：
在Copy Bundle Resources中选择Add Other...找到对应文件导入即可
代码部分
最后，在创建好了一个Notification Service Extension后，默认内容如下：
在上面的
极光推送介绍中，对于ios系统，有个很关键的点：推送时，依赖于ios本身的APNS代理，所以极光推送过来的消息会被Notification Service Extension拦截到
对于Notification Service Extension，有这么一段描述可以帮助我们了解：
Notification Service Extension的作用就是在苹果服务器在给手机推送消息的中间，进入Notification Service Extension， 我们可以在进Notification Service Extension时对推送的消息 进行一次加工，这就是Notification Service Extension的功能的作用。
既然如此
在didReceiveNotificationRequest里：
- (void)didReceiveNotificationRequest:(UNNotificationRequest *)request withContentHandler:(void (^)(UNNotificationContent * _Nonnull))contentHandler {
self.contentHandler = contentHandler;
// 含有推送信息
self.bestAttemptContent = [request.content mutableCopy];
// 取出需要的数据
NSString* alertPath = [self.bestAttemptContent.userInfo objectForKey:@"path"];
NSString* receiveAmount = [self.bestAttemptContent.userInfo objectForKey:@"receiptAmount"];
需要播报的金额已经取到了，如何播报出声呢？两个方案，AVSpeechSynthesizer或者自定义推送的声音为要播报的音频
ios12.1及以上版本
if ( @available(iOS 12.1, *)) {
//ios 12.1以上版本无法使用AVSpeechSynthesizer，改用收到推送消息后进行本地推送，通过拼接多次自定义推送提示音达到完整的收款语音播报效果
//默认发声文件播放时长，单位为秒
double defaultAudioPlayTime = 0.5;
//"XX到账"发声文件名
NSString *receiveAudio = @"g";
//"XX到账"发声文件播放时长
double receiveAudioTime = 1.5;
//将收款金额转换成发声文件名列表
// NSString* audioNamesStr = [self translationArabicNum:receiveAmount];
NSNumber *ireceiveAmount = @([receiveAmount doubleValue]);
NSMutableArray *audioNamesArr = [self getArrayByNumber:ireceiveAmount];
NSString *audioNameBefore;
NSString *audioName;
//根据发声文件名列表轮询推送，每个发声文件分别使用一个字符命名，以便拆分
for (int i = 0; i < audioNamesArr.count; i+=1) {
//取出当前发声文件名称
// NSString *audioName = [audioNamesStr substringWithRange:NSMakeRange(i,1)];
audioName = [audioNamesArr objectAtIndex:i];
//
if(i != 0){
audioNameBefore = [audioNamesArr objectAtIndex:(i-1)];
if(audioNameBefore == audioName){
audioName =[NSString stringWithFormat:@"%@Copy",audioName];
}
}
//设置当前文件播放时长
double playTime = defaultAudioPlayTime;
if([audioName isEqualToString:receiveAudio]){
playTime = receiveAudioTime;
}
dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
[self registerNotificationWithString:audioName completeHandler:^{
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(playTime* NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
dispatch_semaphore_signal(semaphore);
});
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
}
self.contentHandler(self.bestAttemptContent);
}
registerNotificationWithString
- (void)registerNotificationWithString:(NSString *)audioName completeHandler:(dispatch_block_t)complete {
[[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions:(UNAuthorizationOptionAlert | UNAuthorizationOptionSound | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) {
if (granted) {
UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc]init];
//将播放提示内容都设置为空，则不会弹窗提示
content.title = @"";
content.subtitle = @"";
content.body = @"";
// 自定义声音
content.sound = [UNNotificationSound soundNamed:[NSString stringWithFormat:@"%@.mp3",audioName]];
content.categoryIdentifier = [NSString stringWithFormat:@"categoryIndentifier%@",audioName];
UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:0.01 repeats:NO];
UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:[NSString stringWithFormat:@"categoryIndentifier%@",audioName] content:content trigger:trigger];
[[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
if (error == nil) {
if (complete) {
complete();
}
}
}];
}
}];
}
ios12.1以下版本
//ios 12.1之前版本直接使用AVSpeechSynthesizer播报即可
self.speechSynthesizer = [[AVSpeechSynthesizer alloc] init];
/*语音播报的内容*/
NSString* audioPlayContent = receiveAmount;
audioPlayContent = [@"XX到账" stringByAppendingString:audioPlayContent];
audioPlayContent = [audioPlayContent stringByAppendingString:@"元"];
AVSpeechUtterance* speechUtterance = [[AVSpeechUtterance alloc] initWithString:audioPlayContent];
/*设置音量*/
speechUtterance.volume = 1.0;
/*设置语调*/
//speechUtterance.pitchMultiplier = 2.0;
/*设置哪国语言*/
speechUtterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];
[self.speechSynthesizer speakUtterance:speechUtterance];
self.contentHandler(self.bestAttemptContent);
