//判断是否允许使用麦克风7.0新增的方法requestRecordPermission -(BOOL)canRecord { __block BOOL bCanRecord = YES; if ([[[UIDevice currentDevice] systemVersion] compare:@"7.0"] != NSOrderedAscending) { AVAudioSession *audioSession = [AVAudioSession sharedInstance]; if ([audioSession respondsToSelector:@selector(requestRecordPermission:)]) { [audioSession performSelector:@selector(requestRecordPermission:) withObject:^(BOOL granted) { if (granted) { bCanRecord = YES; } else { bCanRecord = NO; dispatch_async(dispatch_get_main_queue(), ^{ [[[UIAlertView alloc] initWithTitle:nil message:@"app需要访问您的麦克风。\n请启用麦克风-设置/隐私/麦克风" delegate:nil cancelButtonTitle:@"关闭" otherButtonTitles:nil] show]; }); } }]; } } return bCanRecord; }