Electronic device for transmitting and receiving message having interaction for outputting hidden message and method for controlling the electronic device

1. An electronic device comprising:

a communication interface for wired or wireless communication;

an input interface configured to receive a user input;

a memory configured to store a message application for transmitting or receiving a message that includes a main message;

a display; and

a processor electrically connected to the communication interface, the input interface, the memory, and the display,

wherein the processor is configured to:

set a first interaction for displaying a first hidden message on the main message, the first interaction including information about at least one of an input type, an input position, an input frequency, and an input time of a user input, and an input order of user inputs corresponding to a plurality of areas of the main message;

generate the message to include the main message and the first hidden message, the message being configured such that the first hidden message is displayed on the main message when at least one user input corresponding to the set first interaction is received; and

transmit the generated message to an external device through the communication interface.

2. The electronic device of claim 1 , wherein the processor is further configured to:

display the first hidden message in a first area of the main message.

3. The electronic device of claim 2 , wherein the processor is further configured to:

display the main message on the display;

receive a second user input through a second area of the main message displayed on the display; and

determine the information about at least one of the type, the input position, the input frequency, the input time, and an input sequence of the user input used to display the first hidden message, based on the received second user input.

4. The electronic device of claim 3 , wherein the second area is the same as the first area.

5. The electronic device of claim 2 , wherein the processor is further configured to:

display the main message on the display; and

receive a second user input for selecting the first area of the main message displayed on the display through the input interface.

6. The electronic device of claim 1 , wherein the external device is configured to:

display the first hidden message on the main message, based on the user input used to display the first hidden message and corresponding to the set first interaction.

7. The electronic device of claim 6 , wherein the processor is further configured to:

determine a method of displaying the first hidden message on the main message, based on at least one of a holding time, an input path, and an input speed of the user input used to display the first hidden message.

8. The electronic device of claim 7 , wherein the processor is further configured to:

set the first hidden message to change at least one of transparency, boundary blending, size, resolution, image property, and video image playback time of the first hidden message, based on the user input.

9. The electronic device of claim 1 , wherein the processor is further configured to:

receive a first user input for setting the first interaction through the input interface; and

determine the information about at least one of the type, the input position, the input frequency, the input time, and an input sequence of the user input used to display the first hidden message, based on the received first user input.

10. The electronic device of claim 1 , wherein the main message includes a first image,

wherein the first hidden message includes a second image, and

wherein the processor is further configured to display the first hidden message on the main message by displaying the second image on the first image.

11. The electronic device of claim 1 , wherein the user input used to display the first hidden message and corresponding to the set first interaction includes at least one of a tap input, a drag input, a blow input, and a pinch input.

12. The electronic device of claim 1 , wherein the processor is further configured to:

set a second interaction for displaying a second hidden message on the main message, the second interaction including at least one of the type, the input position, the input frequency, the input time, and an input sequence of another user input used to display the second hidden message; and

generate the message to include the main message, the first hidden message, and the second hidden message and transmit the generated message to the external device through the communication interface.

13. The electronic device of claim 1 , wherein the processor is further configured to:

display, on the main message, an indicator for indicating that the first hidden message is included in the message.

14. An electronic device comprising:

a communication interface for wired or wireless communication;

an input interface configured to receive a user input;

a memory configured to store a message application for transmitting or receiving a message;

a display; and

a processor electrically connected to the communication interface, the input interface, the memory, and the display,

wherein the processor is configured to:

receive a message including a main message and a first hidden message through the communication interface, the message being configured such that the first hidden message is displayed on the main message when a user input corresponding to a first interaction is received, and wherein the first interaction includes information about at least one of an input type, an input position, an input frequency, and an input time of a user input, and an input order of user inputs corresponding to a plurality of areas of the main message;

display the main message on the display; and

display the first hidden message on the main message when receiving at least one user input corresponding to the first interaction through the input interface.

15. The electronic device of claim 14 , wherein the processor is further configured to:

display the first hidden message in a first area of the main message displayed on the display.

16. The electronic device of claim 14 , wherein the main message includes a first image,

wherein the first hidden message includes a second image, and

wherein the processor is configured to display the first hidden message on the main message by displaying the second image on the first image.

17. The electronic device of claim 14 , wherein the processor is further configured to:

set at least one of transparency, boundary blending, size, resolution, image property, and video image playback time of the first hidden message, based on the user input used corresponding to the first interaction.

18. The electronic device of claim 14 , wherein the processor is further configured to:

determine whether to display the first hidden message, based on at least one of an input time and an input path of the user input.

19. The electronic device of claim 14 , wherein the processor is further configured to:

display the second hidden message on the main message, based on a state in which the first hidden message is displayed on the main message, wherein the state is determined based on the user input corresponding to the first interaction.

20. The electronic device of claim 14 , wherein the processor is further configured to:

display information about the first interaction on the main message when detecting a specified operation through a plurality of sensors or receiving a specified user input.