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 m_Toggle;
    public Text m_Text;
    void Start()
    {
        m_Toggle = GetComponent<Toggle>();
        m_Toggle.onValueChanged.AddListener(delegate {
                ToggleValueChanged(m_Toggle);
            });
        m_Text.text = "First Value : " + m_Toggle.isOn;
    }
    void ToggleValueChanged(Toggle change)
    {
        m_Text.text =  "New Value : " + m_Toggle.isOn;
    }
}

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