Unity/UIToggle

チェックボタン

GameObject.Find("/Canvas/Toggle").GetComponent<Toggle> ().isOn = true;
GameObject.Find("/Canvas/Toggle").GetComponent<Toggle> ().isOn = false;

変更イベント

using UnityEngine;
using UnityEngine.UI;
public class Example : MonoBehaviour
{
    Toggle mToggle;
    public Text mText;
    void Start()
    {
        mToggle = GetComponent<Toggle>();
        mToggle.onValueChanged.AddListener(delegate {
            ToggleValueChanged(mToggle);
        });
        mText.text = "First Value : " + mToggle.isOn;
    }
    void ToggleValueChanged(Toggle change)
    {
        mText.text = "New Value : " + mToggle.isOn;
    }
}

公式：https://docs.unity3d.com/ja/current/ScriptReference/UI.Toggle-onValueChanged.html