Dropdown.onValueChanged

説明

ユーザーがドロップダウンリストのオプションをクリックしたときに実行される UnityEvent

Use this to detect when a user selects one or more options in the Dropdown. Add a listener to perform an action when this UnityEvent detects a selection by the user. See the delegates tutorial for more information on delegates.

//Create a new Dropdown GameObject by going to the Hierarchy and clicking Create>UI>Dropdown. Attach this script to the Dropdown GameObject.
//Set your own Text in the Inspector window

using UnityEngine;
using UnityEngine.UI;

public class Example : MonoBehaviour
{
    Dropdown m_Dropdown;
    public Text m_Text;

    void Start()
    {
        //Fetch the Dropdown GameObject
        m_Dropdown = GetComponent<Dropdown>();
        //Add listener for when the value of the Dropdown changes, to take action
        m_Dropdown.onValueChanged.AddListener(delegate {
            DropdownValueChanged(m_Dropdown);
        });

        //Initialise the Text to say the first value of the Dropdown
        m_Text.text = "First Value : " + m_Dropdown.value;
    }

    //Ouput the new value of the Dropdown into Text
    void DropdownValueChanged(Dropdown change)
    {
        m_Text.text =  "New Value : " + change.value;
    }
}