【求助】UNNotificationServiceExtension 创建 AVSpeechSynthesizer 崩溃

[w243137321]

求助
UNNotificationServiceExtension 里面只要一创建 [[AVSpeechSynthesizer alloc] init]; 就挂掉，然后直接推送出来了。

iOS10

请问有人遇到这种情况吗

在主工程里AVSpeechSynthesizer是OK的
另外UNNotificationServiceExtension 中播放 AVAudioPlayer 也是OK的


代码如下：

AVSpeechSynthesisVoice *voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];

AVSpeechSynthesizer *synthesizer = [[AVSpeechSynthesizer alloc] init];
synthesizer.delegate = self;

AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:speekStr];
utterance.voice = voice;

[synthesizer speakUtterance:utterance];