Create only one usable applicationProgramIt is not enough. The IOS application you expect is intuitive and easy to use, interactive and fascinating. When designing an application, you must consider the user experience in every aspect from the selected function to the way the application responds to gestures.
Users may not know the design principles of the user interface, but they can tell whether the application follows the guidelines. Follow 《IOS Human Interface Guidelines(IOS User Interface Guide) clearly describes the principles and conventions to design the best user interface and user experience for your product.
Read this nowArticle:"Design from the user perspective" describes how to create applications with superior user experience. This document describes the guidelines to be followed during programming, but does not cover howCode. Majority
The IOS guide is different from OS X because apps on mobile devices are essentially different.