【Unity基础】初识UI Toolkit - 运行时UI

<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">

    <ui:VisualElement style="flex-grow: 1;">

        <ui:Label text="This is a Label" display-tooltip-when-elided="true"/>

        <ui:Button text="This is a Button" display-tooltip-when-elided="true" name="button"/>

        <ui:Toggle label="Display the counter?" name="toggle"/>

        <ui:TextField picking-mode="Ignore" label="Text Field" text="filler text" name="input-message" />

    </ui:VisualElement>

</ui:UXML>

using UnityEngine;

using UnityEngine.UIElements;

public class SimpleRuntimeUI : MonoBehaviour

{

    private Button _button;

    private Toggle _toggle;

    private int _clickCount;

    //Add logic that interacts with the UI controls in the `OnEnable` methods

    private void OnEnable()

    {

        // The UXML is already instantiated by the UIDocument component

        var uiDocument = GetComponent<UIDocument>();

        _button = uiDocument.rootVisualElement.Q("button") as Button;

        _toggle = uiDocument.rootVisualElement.Q("toggle") as Toggle;

        _button.RegisterCallback<ClickEvent>(PrintClickMessage);

        var _inputFields = uiDocument.rootVisualElement.Q("input-message");

        _inputFields.RegisterCallback<ChangeEvent<string>>(InputMessage);

    }

    private void OnDisable()

    {

        _button.UnregisterCallback<ClickEvent>(PrintClickMessage);

    }

    private void PrintClickMessage(ClickEvent evt)

    {

        ++_clickCount;

        Debug.Log($"{"button"} was clicked!" +

                (_toggle.value ? " Count: " + _clickCount : ""));

    }

    public static void InputMessage(ChangeEvent<string> evt)

    {

        Debug.Log($"{evt.newValue} -> {evt.target}");

    }

}