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http://ivomynttinen.com/blog/ios-design-guidelines

https://sites.google.com/site/designpttrns/

참고할 자료가 잘 정리되어 있다.

UI Guidelines by OS provider

Design Pattern - Mobile

Showcase - App

Showcase - Mobile Web

Showcase - Website for app

Design Pattern - Web (PC)

Tip & Etc., 

1) Display

Apple increased the LED screen-size (diagonal) of iPhone 6 and iPhone 6 Plus from 4 inch (of iPhone 5/5C/5S) to 4.7 inch and 5.5 inch respectively. However, the company maintained the tradition of aspect ratio to 16:9 in both the devices. This means that apps designed and developed for iPhone 5 screen can conveniently scale on iPhone 6 and 6 Plus. Besides, with the big screen of iPhone 6 Plus supporting the landscape mode which will be similar to that of the iPad, developers can now think of adding landscape view features to their apps.

2) Resolution

As iPhone 6 and iPhone 6 Plus offers resolution of 750×1334 pixels at 326 ppi and 1080×1920 pixels at 401 ppi respectively, Apple has upgraded its status from Retina to Retina HD.

3) Iconography

Icons form the most important part of any user experience. Even though iPhone 6 will support same icon dimensions as that of iPhone 5 i.e. 2x pixel size, iPhone 6 Plus  will support 3x pixel size.

4) UI Elements

Similar to the icons, UI Elements of iPhone 6 and 6 Plus will also support 2x and 3 x pixel size respectively.

5) Typography

With default font continuing to be Helvetica Neue, the font size of iPhone 5 and 6 will remain the same for Navigation Bar Title, Regular Buttons, Table Header and Tab Bar Icon Labels. Besides, the font size and weight will increase in all the elements of iPhone 6 Plus.