2016下半年最新UI设计规范
参考文献：
1. http://www.iphonehacks.com/2014/09/use-display-zoom-iphone-6-plus.html
2. https://www.paintcodeapp.com/news/ultimate-guide-to-iphone-resolutions
3. http://www.umindex.com/devices/ios_models
4. http://support.minitab.com/en-us/minitab/17/topic-library/modeling-statistics/doe/factorial-designs/what-is-a-design-resolution/
