1. Interface design: the design of physical presentation layer. Every product or interactive form appears in this form, including graphics, icons, colors, text design and so on. , through which users can use the system.

2. Interaction design: UI refers to information collection and feedback, input and output, and is an interface-based interaction between people and products. At this level, Ul is understood as UserInteraction, that is, user interaction, which is the significance of the appearance and existence of the interface.

3. User research: study the psychology and behavior of users, and design the interface structure, behavior and vision from the perspective of users. In the context of big data, in the information space, interaction will become more free, natural and ubiquitous. With the development of technology, design concept and multi-channel interface, until the appearance of pervasive computing interface, the interaction experienced by users is subconscious or even unconscious.

Extended data:

Relevant principles of UI design:

1, consistency of language use. Use the same word to describe the same thing, otherwise it will bring unnecessary trouble to users. For example, if you use "search", don't use "search" in the same situation.

2, color matching: the same color, different matching proportions, different matching positions, will produce different emotional colors. No more than three colors are the basis of all color principles.

3. Icon application: Try to use common icons. Let's not try to change the icons that users are used to. Using common icons will make it easier for users to use and the interface more friendly.