推送扩展 Demo

import "NotificationService.h"

import

@interface NotificationService ()

@property (nonatomic, strong) void (^contentHandler)(UNNotificationContent *contentToDeliver);

@property (nonatomic, strong) UNMutableNotificationContent *bestAttemptContent;

/** 语音合成引擎 */
@property (nonatomic, strong) AVSpeechSynthesizer *voiceSpeaker;

/** 弹框是否已经展示 */
@property (nonatomic, assign) BOOL alertIsDisplayed;

@end
PS:这里通过判断文字个数来控制通知栏什么时候显示

/** 文字限制长度 暂定为15字*/
static int contentLengthLimit = 18;

• (void)didReceiveNotificationRequest:(UNNotificationRequest *)request withContentHandler:(void (^)(UNNotificationContent * _Nonnull))contentHandler {
  self.contentHandler = contentHandler;
  self.bestAttemptContent = [request.content mutableCopy];

  NSError *activeErr = nil;
  NSError *cateroyErr = nil;

  [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:&cateroyErr];
  [[AVAudioSession sharedInstance] setActive:YES error:&activeErr];

  self.alertIsDisplayed = NO;

  // Modify the notification content here...
  self.bestAttemptContent.title = [NSString stringWithFormat:@"%@By涛声", self.bestAttemptContent.title];

  [self speakStringFromServer:self.bestAttemptContent.body];
  }

pragma mark - 处理并播放服务器返回的内容

• (void)speakStringFromServer:(NSString *)string {

  if (string.length == 0) {

    // 如果字符串长度为0，则直接弹出通知Alert，不执行任何操作 通知栏的隐藏不需要我们来控制，因为5秒左右的生命周期结束后，它会自动隐藏
    self.alertIsDisplayed = YES;
    self.contentHandler(self.bestAttemptContent);
    
    return;
  

  }

  // 如果文字过长的话，会导致文字播放到一半时出现通知的声音，故将通知声音关闭
  self.bestAttemptContent.sound = nil;

  if (string.length <= contentLengthLimit) {

    // 如果文字长度较短的话则直接弹出通知栏并且开启通知声音
    self.bestAttemptContent.sound = [UNNotificationSound defaultSound];
    
    // 如果需要播放的内容长度小于限制长度，5秒时间足以播放完毕，则直接弹出Alert。
    self.alertIsDisplayed = YES;
    self.contentHandler(self.bestAttemptContent);
  

  }

  NSString *needStr = [self getNumberFromString:string];

  [needStr stringByAppendingString:@""];

  NSString *tempStr = [NSString stringWithFormat:@",%@", needStr];

  NSString *finalStr = [string stringByReplacingOccurrencesOfString:needStr withString:tempStr];

  [self speakString:finalStr];

}

• (void)speakString:(NSString *)string {

  if (self.voiceSpeaker) {

    AVSpeechUtterance *aUtterance = [AVSpeechUtterance speechUtteranceWithString:string];
    
    [aUtterance setVoice:[AVSpeechSynthesisVoice voiceWithLanguage:@"zh-TW"]];
    
    aUtterance.rate = 0.5; //设置语速
    
    aUtterance.volume = 1;  //设置音量（0.0~1.0）默认为1.0
    
    aUtterance.pitchMultiplier = 1;  //设置语调 (0.5-2.0)
    
    [self.voiceSpeaker speakUtterance:aUtterance];
  

  }
  }

pragma mark - 获取字符串中的数字 以便在数值处特意停顿一下

• (NSString *)getNumberFromString:(NSString *)string {

  NSScanner *scanner = [NSScanner scannerWithString:string];

  [scanner scanUpToCharactersFromSet:[NSCharacterSet decimalDigitCharacterSet] intoString:nil];

  float num ;

  [scanner scanFloat:&num];

  NSString *tempStr = [NSString stringWithFormat:@"%.2f", num];

  NSDecimalNumber *resultNum = [NSDecimalNumber decimalNumberWithString:tempStr];

  NSString *resultStr = [NSString stringWithFormat:@"%@", resultNum];

  return resultStr;
  }

pragma mark - AVSpeechSynthesizerDelegate

• (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance
  {
  NSLog(@"开始");
  }

• (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance
  {
  NSLog(@"结束");
  }

• (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didPauseSpeechUtterance:(AVSpeechUtterance *)utterance
  {
  NSLog(@"暂停");
  }

• (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didContinueSpeechUtterance:(AVSpeechUtterance *)utterance
  {
  NSLog(@"继续");
  }

• (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didCancelSpeechUtterance:(AVSpeechUtterance *)utterance
  {
  NSLog(@"取消");
  self.alertIsDisplayed = YES;
  self.contentHandler(self.bestAttemptContent);
  }

• (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer willSpeakRangeOfSpeechString:(NSRange)characterRange utterance:(AVSpeechUtterance *)utterance {

  if (self.alertIsDisplayed == NO) {

    if (characterRange.location >= utterance.speechString.length / 4) {
        
        // 如果文字长度大于限制,则可能通知栏弹出5秒内无法播放完毕，则暂定为播放到1/4时再弹出状态栏
        self.alertIsDisplayed = YES;
        self.contentHandler(self.bestAttemptContent);
    }
  

  }
  }

• (void)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.

  // 当一条通知达到后，如果在30秒内，还没有呼出通知栏，系统就强制调用来呼出通知栏
  self.alertIsDisplayed = YES;
  self.contentHandler(self.bestAttemptContent);
  }

pragma mark - 懒加载

• (AVSpeechSynthesizer *)voiceSpeaker {

  if (!_voiceSpeaker) {

    _voiceSpeaker = [[AVSpeechSynthesizer alloc] init];
    
    _voiceSpeaker.delegate = self;
  

  }

  return _voiceSpeaker;
  }