unity报错:MissingComponentException: There is no 'CanvasGroup' attached to the "popupPanel" game object, but a script is trying to access it. You probably need to add a CanvasGroup to the game object "popupPanel". Or your script needs to check if the component is attached before using it. ButtonController.OnButtonClick () (at Assets/Scripts/ButtonController.cs:29) UnityEngine.Events.InvokableCall.Invoke () (at <1b1edefaa08b47a39f5182510f3f9ef9>:0) UnityEngine.Events.UnityEvent.Invoke () (at <1b1edefaa08b47a39f5182510f3f9ef9>:0) UnityEngine.UI.Button.Press () (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/UI/Core/Button.cs:68) UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/UI/Core/Button.cs:110) UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/ExecuteEvents.cs:50) UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/ExecuteEvents.cs:261) UnityEngine.EventSystems.EventSystem:Update() (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/EventSystem.cs:377)
时间: 2023-06-19 12:09:15 浏览: 437
Exporter for Unreal to Unity 2024 Version:1.41
这个错误是由于你的代码中的某一个脚本试图访问一个名为“popupPanel”的游戏对象上的CanvasGroup组件,但是该组件不存在。解决此问题的方法是:
1. 在“popupPanel”游戏对象上添加CanvasGroup组件。你可以在Inspector窗口中选中该游戏对象,然后点击“Add Component”按钮来添加组件。
2. 在脚本中添加检查代码,确保该组件存在再进行访问。你可以使用GetComponent<CanvasGroup>()方法来获取CanvasGroup组件,然后检查返回值是否为空。
例如,在ButtonController.cs脚本的第29行之前添加以下代码:
```
CanvasGroup canvasGroup = popupPanel.GetComponent<CanvasGroup>();
if (canvasGroup == null)
{
Debug.LogError("CanvasGroup component not found on popupPanel game object.");
return;
}
```
这将检查“popupPanel”游戏对象上是否存在CanvasGroup组件,如果不存在,则在控制台打印错误消息,并退出OnClick方法的执行。
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