unity runtime_error ai_generated true

NullReferenceException：Physics.OverlapSphereNonAlloc 返回了空的结果数组

NullReferenceException: Physics.OverlapSphereNonAlloc returned null results array

ID: unity/physics-overlap-sphere-null

其他格式: JSON · Markdown 中文 · English
95%修复率
88%置信度
1证据数
2023-09-18首次发现

版本兼容性

版本状态引入弃用备注
2020.3.48f1 active — — —
2021.3.30f1 active — — —
2022.3.10f1 active — — —

根因分析

传递给 OverlapSphereNonAlloc 的结果数组在调用方法之前为 null 或未初始化。

English

The results array passed to OverlapSphereNonAlloc is null or not initialized before calling the method.

generic

官方文档

https://docs.unity3d.com/ScriptReference/Physics.OverlapSphereNonAlloc.html

解决方案

  1. Initialize the results array before the call: `Collider[] results = new Collider[10]; int count = Physics.OverlapSphereNonAlloc(center, radius, results);`
  2. Check if results is null before passing: `if (results == null) results = new Collider[10]; int count = Physics.OverlapSphereNonAlloc(center, radius, results);`

无效尝试

常见但无效的做法:

  1. 95% 失败

    The null check doesn't prevent the NullReferenceException from being thrown when accessing the uninitialized array in the method call itself.

  2. 99% 失败

    The error is about the array being null, not its size; size is irrelevant if the array reference is null.

  3. 30% 失败

    OverlapSphere allocates a new array each call, which may fix the immediate null issue but introduces GC pressure and doesn't solve the root cause of uninitialized array.