Unity:イベントハンドラーから値を返す

2016/01/29

EventArgsを継承して独自の値を返すクラスを作成する。

イベント発行側

using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System;

public class SampleButtonArgs : EventArgs
{
    public int id { get; set; }
}
public class SampleButton : MonoBehaviour
{
    public event EventHandler<SampleButtonArgs> eventOnClickButton;

    [SerializeField]
    Button _button;

    void Awake()
    {
        _button.onClick.AddListener(OnClickButton);
    }

    void OnClickButton()
    {
        if (eventOnClickButton != null)
        {
            SampleButtonArgs args = new SampleButtonArgs();
            args.id = UnityEngine.Random.Range(0, 256);

            eventOnClickButton(this, args);
        }
    }
}

using UnityEngine;

using UnityEngine.UI;

using System.Collections;

using System;

public class SampleButtonArgs : EventArgs

{

public int id { get; set; }

}

public class SampleButton : MonoBehaviour

{

public event EventHandler<SampleButtonArgs> eventOnClickButton;

[SerializeField]

Button _button;

void Awake()

{

_button.onClick.AddListener(OnClickButton);

}

void OnClickButton()

{

if (eventOnClickButton != null)

{

SampleButtonArgs args = new SampleButtonArgs();

args.id = UnityEngine.Random.Range(0, 256);

eventOnClickButton(this, args);

}

イベント受信側

using UnityEngine;
using System.Collections;

public class Sample : MonoBehaviour
{
    [SerializeField]
    SampleButton _sampleButton;

    void Awake()
    {
        _sampleButton.eventOnClickButton += _sampleButton_eventOnClickButton;
    }

    private void _sampleButton_eventOnClickButton(object sender, SampleButtonArgs e)
    {
        Debug.Log("click! id=" + e.id);
    }
}

using UnityEngine;

using System.Collections;

public class Sample : MonoBehaviour

{

[SerializeField]

SampleButton _sampleButton;

void Awake()

{

_sampleButton.eventOnClickButton += _sampleButton_eventOnClickButton;

}

private void _sampleButton_eventOnClickButton(object sender, SampleButtonArgs e)

{

Debug.Log("click! id=" + e.id);

}

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