User interface refers to the overall design of human-computer interaction, operation logic and beautiful interface of software. Good UI design not only makes the software become personalized and tasteful, but also makes the operation of software become comfortable, simple and free, fully reflecting the positioning and characteristics of software. < p > < p > user interface is a medium for interaction and information exchange between the system and users. It realizes the transformation between the internal form of information and the acceptable form of human beings. User interface is a kind of software which is designed to communicate with each other between users and hardware. The purpose of user interface is to enable users to operate hardware conveniently and efficiently to achieve two-way interaction and complete the work that they want to complete with the help of hardware. User interface is widely defined, including human-computer interaction and graphical user interface. All the fields involved in information exchange between human and machinery exist User interface. gather and watch! Huawei P40 Pro evaluation: excellent mobile phone photography elegant design, do you like it?