ScrollRect.onValueChanged

描述

在子项的位置更改时执行的回调。

onValueChanged 用于监视 ScrollRect 对象中的更改。 onValueChanged 调用将使用 UnityEvent.AddListener API 来监视 更改。发生更改时，将调用用户提供的脚本代码。 ScrollRect.onValueChanged 的 UnityEvent.AddListener API 要求一个 Vector2 参数。

Note: The editor allows the onValueChanged value to be set up manually. For example the value can be set to run only a runtime. The object and script function to call are also provided here.

The onValueChanged variable can be alternatively set-up at runtime. The script example below shows how this can be done. The script is attached to the ScrollRect object.

using UnityEngine;
using UnityEngine.UI;

public class ExampleScript : MonoBehaviour
{
    static ScrollRect scrollRect;

    void Start()
    {
        scrollRect = GetComponent<ScrollRect>();
        scrollRect.onValueChanged.AddListener(ListenerMethod);
    }

    public void ListenerMethod(Vector2 value)
    {
        Debug.Log("ListenerMethod: " + value);
    }
}