Canvas は柔軟な要素です、子要素アルファやレイキャスティングや有効状態を修正することができます。
A canvas group can be used to modify the state of children elements.
An example of this would be a window which fades in over time, by modifying the alpha value of the group the children elements will be affected. The result alpha will be the multiplied result of any nested groups, multiplied with the canvas elements alpha.
You can configure Canvas Groups to not block raycasts. When you configure a Canvas Group to not block raycasts, graphic raycasting ignores anything in the group.
Let's say you have a Canvas GameObject with a CanvasGroup component on it, and you set the CanvasGroup component's alpha to 0. In that case, the Canvas does not render any of its child GameObjects.
Now suppose that the Canvas also has a child CanvasGroup GameObject that you do want to render. If you enable IgnoreParentGroups for the CanvasGroup GameObject, the parent Canvas does not render any of its child GameObjects, including the CanvasGroup you want to render.
To get the child CanvasGroup GameObject, do one of two things:
In the parent Canvas, set the CanvasGroup component's alpha to a small, non-zero value.
Add a Canvas component to the child CanvasGroup GameObject that you want to render.
| alpha | グループのアルファを設定します |
| blocksRaycasts | このグループのレイキャストをブロックする（衝突が許可されている） |
| ignoreParentGroups | グループが親グループを無視するべきか？ |
| interactable | グループに互換性がある（許可グループの下の要素である）。 |
| IsRaycastLocationValid | グループがレイキャストを許可していれば True を返します |
| enabled | 有効であれば更新され、無効であれば更新されません。 |
| isActiveAndEnabled | Reports whether a GameObject and its associated Behaviour is active and enabled. |
| gameObject | このコンポーネントはゲームオブジェクトにアタッチされます。コンポーネントはいつもゲームオブジェクトにアタッチされています。 |
| tag | ゲームオブジェクトのタグ |
| transform | The Transform attached to this GameObject. |
| hideFlags | Should the object be hidden, saved with the Scene or modifiable by the user? |
| name | オブジェクト名 |
| BroadcastMessage | ゲームオブジェクトまたは子オブジェクトにあるすべての MonoBehaviour を継承したクラスにある methodName 名のメソッドを呼び出します。 |
| CompareTag | Checks the GameObject's tag against the defined tag. |
| GetComponent | Gets a reference to a component of type T on the same GameObject as the component specified. |
| GetComponentInChildren | Gets a reference to a component of type T on the same GameObject as the component specified, or any child of the GameObject. |
| GetComponentInParent | Gets a reference to a component of type T on the same GameObject as the component specified, or any parent of the GameObject. |
| GetComponents | Gets references to all components of type T on the same GameObject as the component specified. |
| GetComponentsInChildren | Gets references to all components of type T on the same GameObject as the component specified, and any child of the GameObject. |
| GetComponentsInParent | Gets references to all components of type T on the same GameObject as the component specified, and any parent of the GameObject. |
| SendMessage | ゲームオブジェクトにアタッチされているすべての MonoBehaviour にある methodName と名付けたメソッドを呼び出します |
| SendMessageUpwards | ゲームオブジェクトと親（の親、さらに親 ... ）にアタッチされているすべての MonoBehaviour にある methodName と名付けたメソッドを呼び出します |
| TryGetComponent | Gets the component of the specified type, if it exists. |
| GetInstanceID | Gets the instance ID of the object. |
| ToString | Returns the name of the object. |
| Destroy | Removes a GameObject, component or asset. |
| DestroyImmediate | Destroys the object obj immediately. You are strongly recommended to use Destroy instead. |
| DontDestroyOnLoad | Do not destroy the target Object when loading a new Scene. |
| FindAnyObjectByType | Retrieves any active loaded object of Type type. |
| FindFirstObjectByType | Retrieves the first active loaded object of Type type. |
| FindObjectOfType | タイプ type から最初に見つけたアクティブのオブジェクトを返します |
| FindObjectsByType | Retrieves a list of all loaded objects of Type type. |
| FindObjectsOfType | Gets a list of all loaded objects of Type type. |
| Instantiate | original のオブジェクトをクローンします |
| bool | オブジェクトが存在するかどうか |
| operator != | 二つのオブジェクトが異なるオブジェクトを参照しているか比較します |
| operator == | 2つのオブジェクト参照が同じオブジェクトを参照しているか比較します。 |