ios 推送语音播报

分享一个类似支付宝收款提醒的语音播报，我这里推送配的是个推，集成配置都可以参照个推文档中心，文档介绍步骤都很详细。

1、打开推送Capabilities---Push Notifications

2、开启远程推送Capabilities---Background Modes---Remote Notifications

3、新建UNNotification Service Extension

File---New---Target，选UNNotification Service Extension

新建完成后你会发现多了几个文件

4、开始编码

添加声音依赖库AVFoundation，在NotificationService.m中代码如下，现在可以去个推官方推一条试试了。后台推的是透传消息，在项目在前台运行时，可以自行添加声音方法。

#import "NotificationService.h"
#import <AVFoundation/AVSpeechSynthesis.h>
#import <MediaPlayer/MediaPlayer.h>

@interface NotificationService ()<AVSpeechSynthesizerDelegate>

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

@end

@implementation NotificationService

- (void)didReceiveNotificationRequest:(UNNotificationRequest *)request withContentHandler:(void (^)(UNNotificationContent * _Nonnull))contentHandler {
    
    self.contentHandler = contentHandler;
    self.bestAttemptContent = [request.content mutableCopy];
    
    // Modify the notification content here...
    self.bestAttemptContent.title = [NSString stringWithFormat:@"%@ [modified]", self.bestAttemptContent.title];
   
    self.contentHandler(self.bestAttemptContent);
    
    [self startSpeaking:self.bestAttemptContent.body];
    
}

- (void)startSpeaking:(NSString *)words{
    
    // 创建语音合成器
    AVSpeechSynthesizer *synthesizer = [[AVSpeechSynthesizer alloc] init];
    synthesizer.delegate = self;
    // 设置语音
    AVSpeechSynthesisVoice *voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];
    // 转换文本
    AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:words];
    utterance.voice = voice;
    // 语速
    utterance.rate = 0.8;
    // 朗读的内容
    [synthesizer speakUtterance:utterance];

}

#pragma mark AVSpeechSynthesizerDelegate
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance{
    NSLog(@"开始播放");
}
- (void)speechSynthesizer:(AVSpeechSynthesizer*)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance*)utterance{
    NSLog(@"完成播放");
}

@end

5、其他

1）创建UNNotification Service Extension成功后，这里Bundle ID 会自动添加 .MyNotification，不需要重新配置证书

后面选择证书的地方设成默认就行

2）不太了解Notification Servivice Extension的可以先看下这篇文章，作者讲解的很详细