https://blog.wongcw.com/2018/12/13/%e5%9c%a8%e4%bd%a0%e7%9c%8b%e4%be%86iphone-xr%e7%82%ba%e4%bb%80%e9%ba%bc%e4%b8%8d%e5%a6%82%e5%8e%bb%e5%b9%b4%e5%8f%97%e6%ad%a1%e8%bf%8e%ef%bc%9f/