[Unity] 함수 호출을 늦춰주는 Invoke

[Unity] 함수 호출을 늦춰주는 Invoke

문제

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

public class CameraCapture : MonoBehaviour
{
    [SerializeField]
    private Button TakePhotoButton;
    [SerializeField]
    private GameObject Canvas;
    public int fileCounter;
    public KeyCode screenshotKey;

    private Camera Camera
    {
        get
        {
            if (!_camera)
            {
                // _camera = Camera.main;
                _camera = Camera.main;
            }
            return _camera;
        }
    }

    [SerializeField]
    private Camera _camera;
    void Awake()
    {
        TakePhotoButton.onClick.AddListener(TakePhoto);
    }

    private void TakePhoto()
    {
        Debug.Log("TakePhoto()" + fileCounter);
        // Capture();
        Canvas.SetActive(false);
        Screenshot();
    }

    private void Screenshot()
    {
        Texture2D texture = new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);
        texture.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
        texture.Apply();

        byte[] bytes = texture.EncodeToPNG();
        string name = "AR Camera" + System.DateTime.Now.ToString("yyyy-mm-dd_HH-mm-ss") +fileCounter + ".png";
        NativeGallery.SaveImageToGallery(bytes, "AR Camera", name);
        fileCounter++;
        Destroy(texture);
        Canvas.SetActive(true);
        Debug.Log("Canvas True");
    }
}

위 코드를 실행하면

Button들의 상위에 해당하는 Canvas가 SetActive(false) 되지 못하고 보이게 된다.

따라서 시간지연 기능 함수 Invoke를 이용한다.

Invoke("method name", 2f)     // (함수명, sec)

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

public class CameraCapture : MonoBehaviour
{
    [SerializeField]
    private Button TakePhotoButton;
    [SerializeField]
    private GameObject Canvas;
    public int fileCounter;
    public KeyCode screenshotKey;

    private Camera Camera
    {
        get
        {
            if (!_camera)
            {
                // _camera = Camera.main;
                _camera = Camera.main;
            }
            return _camera;
        }
    }

    [SerializeField]
    private Camera _camera;
    void Awake()
    {
        TakePhotoButton.onClick.AddListener(TakePhoto);
    }

    private void TakePhoto()
    {
        Debug.Log("TakePhoto()" + fileCounter);
        Canvas.SetActive(false);
        Invoke("Screenshot", 1f);
        // Screenshot();
    }

    private void setActiveTrue()
    {
        Canvas.SetActive(true);
    }

    private void Screenshot()
    {
        Texture2D texture = new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);
        texture.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
        texture.Apply();

        byte[] bytes = texture.EncodeToPNG();
        string name = "AR Camera" + System.DateTime.Now.ToString("yyyy-mm-dd_HH-mm-ss") +fileCounter + ".png";
        NativeGallery.SaveImageToGallery(bytes, "AR Camera", name);
        fileCounter++;
        Destroy(texture);
        // Canvas.SetActive(true);
        Invoke("setActiveTrue", 2f);
        Debug.Log("Canvas True");
    }
}

순서

• Canvas.SetActive(false); Ui를 화면에서 지운다
• Invoke("Screenshot", 1f); Screenshot함수를 1초 후 호출
• Invoke("setActiveTrue", 2f); setActiveTrue함수를 2초후 호출