如何使用 UI 按钮模拟键盘按下？

Question

I'm trying to port a runner game I made for PC onto Android, so I already have full player control set up using the Space bar, Up arrow, Down arrow, and s button so I wanted to be able to just create UI buttons that simulate a keyboard keypress.

Is there any way for me to, for instance, create a script that states that OnButtonPress trigger a keyboard key such as the Space key for jumping?

Answer 1

Instead of simulating inputs, you can split the work out into functions that can be called from either event.

Example for jump-

private void DoJump()
{
    // Jump logic here
}

PC Input

private void Update()
{
    if (Input.GetKeyUp(KeyCode.Space))
    {
        DoJump();
    }
}

Mobile Input

[SerializeField]
private Button jumpButton; // <- assign this in inspector

private void Awake()
{
    jumpButton.onClick.AddListener(() => DoJump());
}

Another alternative to this setup is using the new input system. The new input system allows you to map inputs from different sources to the same action. New Input System .

This is my preferred way of handling inputs now when controller, mouse/keyboard, and joystick support are required.

For an existing project where you have everything working as expected, it is often easier and less work to use the first example above.