MissingReferenceException: The object of type 'GameObject' has been destroyed but you are still trying to access it. Your script should either check if it is null or you should not destroy the object. TowerAI.SelectTarget () (at Assets/Scripts/TowerAI.cs:76) TowerAI.Update () (at Assets/Scripts/TowerAI.cs:31)
时间: 2024-02-12 12:02:51 浏览: 37
这是一个常见的错误,意思是你尝试访问一个已经被销毁的 GameObject。在你的代码中,第 76 行或第 31 行尝试访问一个已经被销毁的 GameObject,但是在这个时候这个对象已经不存在了,因此会抛出 MissingReferenceException 异常。
为了解决这个问题,你需要在访问 GameObject 之前检查它是否为 null。你可以使用条件语句或者 null 合并运算符来实现这个检查。例如,在 TowerAI.SelectTarget() 方法中,你可以这样写:
```
if (gameObject != null) {
// 访问 gameObject 的代码
}
```
或者使用 null 合并运算符:
```
// 访问 gameObject 的代码
gameObject?.GetComponent<SomeComponent>();
```
此外,你还可以检查代码中是否存在意外销毁 GameObject 的地方,例如删除了一个 GameObject,但是在代码中仍然尝试访问它。
相关问题
unity报错:MissingComponentException: There is no 'AudioSource' attached to the "GameObject" game object, but a script is trying to access it. You probably need to add a AudioSource to the game object "GameObject". Or your script needs to check if the component is attached before using it. DynamicPlayAudio.Start () (at Assets/EasyAR/Resources/Scripts/DynamicPlayAudio.cs:13)
这个错误是因为你的脚本在试图访问一个名为"GameObject"的游戏对象上的AudioSource组件,但是该游戏对象上并没有附加AudioSource组件。你需要在该游戏对象上添加一个AudioSource组件,或者在使用该组件之前,先检查该游戏对象是否已经添加了该组件。你可以在脚本的第13行检查是否存在AudioSource组件,如果不存在,可以添加代码来添加该组件,如下所示:
```
AudioSource audioSource = gameObject.GetComponent<AudioSource>();
if(audioSource == null){
audioSource = gameObject.AddComponent<AudioSource>();
}
```
这样就可以避免这个错误了。
UnassignedReferenceException:+The+variable+sphere+of+follow+has+not+been+assigned. You+probably+need
UnassignedReferenceException is an error that occurs in Unity when a variable has not been assigned a value before it is used. In the given example, the variable "sphere" of "follow" has not been assigned a value.
To fix this error, you need to ensure that the variable "sphere" is assigned a valid value before it is used. This can be done by either assigning a value to the variable directly or by using a reference to an existing object.
Here are a few possible solutions:
1. Assign a value to the variable "sphere" before using it:
```
public GameObject sphere; // Declare the variable
void Start()
{
sphere = GameObject.Find("Sphere"); // Assign a value to the variable
}
```
2. Drag and drop the desired object onto the script component in the Unity editor:
- Create a public field for the variable "sphere" in the script.
- In the Unity editor, select the object you want to assign to "sphere".
- Drag and drop the object onto the script component that contains the "sphere" variable.
3. Use GetComponent to find and assign the object at runtime:
```
public GameObject sphere; // Declare the variable
void Start()
{
sphere = GetComponent<GameObject>(); // Assign a value to the variable
}
```
Remember to adjust the code according to your specific use case and object names.