Control method applied to screen projection scenario and related device

1. A control system, comprising:

a first electronic device and a second electronic device; wherein

the first electronic device displays a first screen content when the first electronic device is in the first navigation function, and the first navigation function is different from a three-key navigation function;

the second electronic device displays a screen projection window and a navigation bar after the first electronic device and the second electronic device establish connection, wherein the screen projection window comprises the first screen content, and the navigation bar comprises three virtual navigation keys;

the second electronic device receives a user operation acting on one of the virtual navigation keys;

the first electronic device displays a second screen content, after the first electronic device performs the navigation function corresponding to the one of the virtual navigation keys;

the second electronic device displays the second screen content in the screen projection window;

wherein the first electronic device returns to a desktop when the first electronic device receives an operation of sliding up from a lower left end of a screen of the first electronic device;

wherein the first electronic device enters a task menu when the first electronic device receives an operation of sliding up from the lower left end of the screen and holding for a period of time; and

wherein the first electronic device returns to an upper level when the first electronic device receives an operation of sliding rightward from a leftmost side of the screen of the first electronic device.

2. The system according to claim 1 , wherein the three virtual navigation keys include a menu key, a desktop key and a return key, wherein the menu key corresponds to a navigation function of entering the task menu, the desktop key corresponds to a navigation function of returning to the desktop, and the return key corresponds to a navigation function of returning to an upper level navigation.

3. The system according to claim 1 , wherein the user operation comprises a single-click by mouse.

4. The system according to claim 1 , wherein the navigation bar is outside the screen projection window.

5. The system according to claim 1 , wherein the navigation bar is located below the screen projection window.

6. The system according to claim 1 , wherein the first navigation function comprises a gesture navigation or an out-of-screen physical navigation.

7. The system according to claim 6 , wherein the gesture navigation comprises:

receiving, by the first electronic device, an operation of sliding up from a lower left end of the screen; or

receiving, by the first electronic device, an operation of sliding upward from the lower left end of the screen and holding for a period of time; or

receiving, by the first electronic device, an operation of sliding rightward from the leftmost side of the screen of the first electronic device.

8. The system according to claim 6 , wherein the second electronic device simultaneously enables the three-key navigation and the gesture navigation.

9. The system according to claim 1 , wherein the screen projection window and the navigation bar are located in a same collaborative window.

10. The system according to claim 1 , wherein the collaboration window is located on the right side of a screen of the second electronic device.

11. The system according to claim 10 , wherein the collaborative window comprises a title bar, and the title bar comprises at least a minimized window key, a maximized window key and a close window key.

12. The system according to claim 11 , wherein the title bar is located above the screen projection window.

13. The system according to claim 10 , wherein:

prior to displaying a screen projection window and a navigation bar, the second electronic device receives the first screen content and a first target navigation function identifier sent by the first electronic device, wherein the first navigation function identifier is the identifier of the first navigation function.

14. The system according to claim 1 , wherein:

prior to displaying the second screen content,

the second electronic device generates a key instruction according to the user operation; and

the second electronic device sends the key instruction to the first electronic device, wherein the key instruction corresponds to a function of receiving the virtual navigation key operated by the keyboard and mouse.

15. The system according to claim 1 , wherein:

prior to displaying the second screen content in the screen projection window, the second electronic device receives the second screen content sent by the first electronic device.

16. The system according to claim 1 , wherein:

when the first electronic device is in the three-key navigation function, after the first electronic device and the second electronic device are connected, the second electronic device mirrors the first screen content on the screen projection window, wherein the navigation bar is hidden.

17. The system according to claim 13 , wherein,

the second electronic device sends a navigation function modification instruction to the first electronic device according to the first navigation function identifier; and

the first electronic device changes the first navigation function to the three-key navigation function according to the navigation function modification instruction.

18. The system according to claim 17 , wherein:

the first electronic device displays the navigation bar; and

the second electronic device displays the navigation bar, and the navigation bar is used to control the first electronic device on the second electronic device.

19. The system according to claim 1 , wherein:

the first electronic device displaying the second screen content and the second electronic device displaying the second screen content are displayed synchronously.