Unity中Inspector动态Public GameObject数组索引使用问题咨询

Hey there! Let's break down why you're hitting that "value expected" error when using i as the index for your ThingToKill array, and how to fix it.

First, the core issue here is that Unity (or your code compiler) doesn’t recognize i as a valid integer value to use as an array index. Hardcoding a number like 1 works because it’s a clear, literal value—but i needs to be properly defined, initialized, and within the valid range of your array’s indices to function correctly.

Common Fixes for C# Code #

If you’re writing C# scripts, follow these key steps:

1. Properly declare and initialize i
   Make sure i is declared as an integer variable and assigned a valid value before using it. For example:

   public GameObject[] ThingToKill; // Your public array set in the Inspector
   
   void ActivateTargetObject()
   {
       // Declare i and assign a valid index (must be between 0 and ThingToKill.Length - 1)
       int i = 0;
       
       // Optional: Add a check to avoid index out-of-range errors
       if (i >= 0 && i < ThingToKill.Length)
       {
           ThingToKill[i].SetActive(true);
       }
   }
   

2. Use i in a loop (for iterating through the array)
   If you’re trying to loop through all elements in the array, use a for loop where i is automatically declared and incremented correctly:

   void ActivateAllObjects()
   {
       // Loop through every valid index in the array
       for (int i = 0; i < ThingToKill.Length; i++)
       {
           ThingToKill[i].SetActive(true);
       }
   }
   

Fixes for Unity Visual Scripting (or similar tools) #

If you’re using a visual scripting system instead of C#:

• Ensure you’ve created an integer variable named i in your graph.
• Assign i a valid integer value (e.g., using a "Set Variable" node, or a "Random Integer" node constrained to 0 to ThingToKill.Length - 1).
• Double-check that the variable i is connected to the array’s index input port—confirm the data type matches (integer, not float or string).

Quick Validation Checks #

Always verify these details to avoid future issues:

• i is an integer (not a float or other incompatible type)
• i’s value falls between 0 and ThingToKill.Length - 1 (array indices start at 0!)
• ThingToKill isn’t empty in the Inspector (you mentioned hardcoding works, so this is likely already covered, but it’s worth a quick check)

Once you ensure i is a valid, properly initialized integer, the "value expected" error should disappear, and you’ll be able to use it as your array index as intended.

内容的提问来源于stack exchange，提问作者cyo