Unity安卓端立方体转向控制改造：替换键盘AD为屏幕左右点击

Got it, let's tweak your code to work with Android touch input instead of keyboard keys. The core idea is splitting the screen into left/right halves and triggering movement based on which side the user taps or holds.

Here's the modified FixedUpdate method:

void FixedUpdate () 
{ 
    rb.AddForce (0, 0, forwardForce * Time.deltaTime); 

    // Check if there's an active touch on the screen
    if (Input.touchCount > 0)
    {
        Touch touch = Input.GetTouch(0); // Grab the first touch (we'll ignore multi-touch for this simple setup)

        // Option 1: Trigger movement ONCE when the user starts tapping
        if (touch.phase == TouchPhase.Began)
        {
            // Split the screen at its horizontal midpoint
            if (touch.position.x > Screen.width / 2)
            {
                // Tap right half: apply rightward force
                rb.AddForce(sidewaysRight * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
            }
            else
            {
                // Tap left half: apply leftward force
                rb.AddForce(sidewaysLeft * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
            }
        }

        // Option 2: Continuous movement while the user holds their finger down
        // Uncomment this and comment Option 1 if you want hold-to-move behavior
        /*
        if (touch.phase == TouchPhase.Began || touch.phase == TouchPhase.Stationary)
        {
            if (touch.position.x > Screen.width / 2)
            {
                rb.AddForce(sidewaysRight * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
            }
            else
            {
                rb.AddForce(sidewaysLeft * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
            }
        }
        */
    }
}

Quick Explanations: #

• Screen Boundary: Screen.width / 2 creates a resolution-agnostic split between left and right, so it works on any Android device.
• Touch Phases:
  • TouchPhase.Began triggers movement only once per tap, which is great for tap-to-shift controls.
  • TouchPhase.Stationary keeps applying force while the user holds their finger down, if you prefer continuous movement.
• Multi-Touch: We're only using the first touch (Input.GetTouch(0)) to keep things simple. If you need to handle multiple taps later, you can loop through all touches with a foreach on Input.touches.

Don't forget to test this on an actual Android device or use Unity's Android Emulator—you can click/drag in the emulator to simulate touch input!

内容的提问来源于stack exchange，提问作者Rodriquez