原因是把UITableViewController嵌入UINavigationController后，
1 | UITableViewController *dc = [segue destinationViewController]; |
没有更改，更改后：
1 | UINavigationController *dc = [segue destinationViewController]; |
用
1 | DetailViewController *DetaiView = [dc topViewController]; |
取得UITableViewController
jsonContent:
meta: false
pages: false
posts:
title: true
date: true
path: true
text: false
raw: false
content: false
slug: false
updated: false
comments: false
link: false
permalink: false
excerpt: false
categories: true
tags: true