バージョン: 2022.1 以降
この例では、TransitionEndEvent
を活用してループする遷移を作成する方法を紹介します。
この例では、2 つのループするアニメーションを紹介します。
この例で作成するすべてのファイルは、GitHub リポジトリ にあります。
このガイドは、Unity エディター、UI Toolkit、および C# スクリプトに精通している開発者を対象としています。始める前に、以下をよく理解してください。
Unity で任意のテンプレートでプロジェクトを作成します。
Project ウィンドウに、loop-transition-example
という名前のフォルダーを作成します。
そのフォルダー上で右クリックし、Create > UI Toolkit > Editor Window を選択します。
UI Toolkit Editor Window Creator ウィンドウに、LoopingExample
と入力します。
変更を保存します。これにより、LoopingExample.cs
、LoopingExample.uss
、LoopingExample.uxml
という 3 つのファイルが作成されます。
LoopingExample.cs
を以下のコンテンツに置き換えます。
using UnityEditor;
using UnityEngine;
using UnityEngine.UIElements;
public class LoopingExample : EditorWindow
{
[SerializeField] private VisualTreeAsset m_VisualTreeAsset = default;
private Label _yoyoLabel;
private Label _a2bLabel;
[MenuItem("Window/UI Toolkit/Transition Looping Example")]
public static void ShowExample()
{
var wnd = GetWindow<LoopingExample>();
wnd.titleContent = new GUIContent("TransitionStyle");
}
public void CreateGUI()
{
VisualElement root = rootVisualElement;
VisualElement asset = m_VisualTreeAsset.Instantiate();
root.Add(asset);
SetupYoyo(root);
SetupA2B(root);
}
// This method powers the yo-yo loop.
private void SetupYoyo(VisualElement root)
{
_yoyoLabel = root.Q<Label>(name: "yoyo-label");
// When the animation ends, the callback toggles a class to set the scale to 1.3
// or back to 1.0 when it's removed.
_yoyoLabel.RegisterCallback<TransitionEndEvent>(evt => _yoyoLabel.ToggleInClassList("enlarge-scale-yoyo"));
// Schedule the first transition 100 milliseconds after the root.schedule.Execute method is called.
root.schedule.Execute(() => _yoyoLabel.ToggleInClassList("enlarge-scale-yoyo")).StartingIn(100);
}
// This method powers the A-to-B cycle.
private void SetupA2B(VisualElement root)
{
_a2bLabel = root.Q<Label>(name:"a2b-label");
_a2bLabel.RegisterCallback<TransitionEndEvent>(evt =>
{
_a2bLabel.RemoveFromClassList("enlarge-scale-a2b");
_a2bLabel.schedule.Execute(() => _a2bLabel.AddToClassList("enlarge-scale-a2b")).StartingIn(10);
});
_a2bLabel.schedule.Execute(() => _a2bLabel.AddToClassList("enlarge-scale-a2b")).StartingIn(100);
}
}
LoopingExample.uxml
を以下のコンテンツに置き換えます。
<ui:UXML xmlns:ui="UnityEngine.UIElements" xmlns:uie="UnityEditor.UIElements"
xsi="http://www.w3.org/2001/XMLSchema-instance"
engine="UnityEngine.UIElements" editor="UnityEditor.UIElements"
noNamespaceSchemaLocation="../../../../UIElementsSchema/UIElements.xsd"
editor-extension-mode="False">
<Style src="LoopingExample.uss" />
<ui:VisualElement name="container">
<ui:VisualElement>
<ui:Label text="Yo-yo Transition" name="yoyo-label" class="text-style" />
</ui:VisualElement>
<ui:VisualElement>
<ui:Label text="A-to-B Transition" name="a2b-label" class="text-style"/>
</ui:VisualElement>
</ui:VisualElement>
</ui:UXML>
LoopingExample.uss
を以下のコンテンツに置き換えます。
#yoyo-label{
transition-duration: 3s;
}
.text-style {
font-size: 20px;
flex-grow: 0;
margin: 20px;
}
.enlarge-scale-a2b{
scale: 1.5 1.5;
transition-duration: 3s;
}
.enlarge-scale-yoyo{
scale: 1.5 1.5;
}
#container{
flex-grow:1;
justify-content: space-around;
align-items: center;
}
例をテストするには、メニューから Window -> UI Toolkit -> Transition Looping Example を選択します。
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