iOS 12 下调用相机闪退，

plist文件中权限已配置，Privacy - Camera Usage Description，iOS 12以下没问题，但是在iOS 12 beta 的时候就闪退

//判断是否已授权
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {
    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    if (authStatus == AVAuthorizationStatusDenied||authStatus == AVAuthorizationStatusRestricted) {
        [FNSystemSet gotoSetCamera:self];
        return ;
    }
}

//获取相机权限
[AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
    NSLog(@"%@",granted ? @"相机准许":@"相机不准许");
}];

// 判断是否可以打开相机
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
    
    [self presentViewController: [self selectPicture:UIImagePickerControllerSourceTypeCamera]
                       animated:YES
                     completion:^{
                     }];
} else {
    FNLog(@"没有相机");
}

最终解决：是在plist文件中加入麦克风权限就OK了