Unity技术问询：如何在指定按钮激活时启用readyToRun按钮？

Hey there, to make your readyToRun button only become enabled when Button1 is active, here's a simple Unity C# implementation that does exactly that:

using UnityEngine; 
using System.Collections; 
using UnityEngine.UI; // Required when working with UI elements. 

public class GratzScript : MonoBehaviour { 
    public Button Button1; 
    public Button readyToRun; 

    public void Update() { 
        // Sync readyToRun's enabled state to match Button1's
        readyToRun.enabled = Button1.enabled;
    } 
}

Breakdown of the Code: #

• We import UnityEngine.UI to access the UI Button component (mandatory when working with Unity's UI system).
• Two public Button references are declared so you can drag-and-drop the respective buttons from your scene directly into the Inspector.
• In the Update() method, we directly sync the enabled state of readyToRun to match Button1's state. This is a cleaner, more concise alternative to wrapping it in an if statement (both approaches work, but this cuts down on unnecessary code).

Pro Tip for Better Performance #

Checking state every frame in Update() works perfectly fine for most small-scale projects, but if you want a more efficient approach (avoiding redundant frame checks), you can listen for when Button1's enabled state changes instead:

using UnityEngine;
using UnityEngine.UI;

public class GratzScript : MonoBehaviour
{
    public Button Button1;
    public Button readyToRun;

    private void OnEnable()
    {
        // Subscribe to Button1's enable/disable events to trigger state changes
        Button1.onEnable.AddListener(() => readyToRun.enabled = true);
        Button1.onDisable.AddListener(() => readyToRun.enabled = false);
        // Set the initial state when the script first activates
        readyToRun.enabled = Button1.enabled;
    }

    private void OnDisable()
    {
        // Unsubscribe from events to prevent memory leaks
        Button1.onEnable.RemoveListener(() => readyToRun.enabled = true);
        Button1.onDisable.RemoveListener(() => readyToRun.enabled = false);
    }
}

This approach only updates readyToRun's state when Button1 actually changes its enabled status, which is more efficient than checking every frame.

内容的提问来源于stack exchange，提问作者Sandro Kikvidze