How to clean the IOS camera cache using c#?

Questions & Answers
1

Hi, i’m doing an application using Qrcode reader (Vuforia plugin). Well, the Qr code reader is open a scene, then when i try to go back to the camera, just to read another qr code, in 2 or 3 seconds, the application reload the previously scene. How can i fix it?

Here is the code:

`using UnityEngine;
using System;
using System.Collections;

using Vuforia;

using System.Threading;

using ZXing;
using ZXing.QrCode;
using ZXing.Common;
using UnityEngine.SceneManagement;

[AddComponentMenu(“System/VuforiaScanner”)]

public class QrCodeReader : MonoBehaviour {

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private BarcodeReader barCodeReader;

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barCodeReader = new BarcodeReader();
StartCoroutine(InitializeCamera());
}

private IEnumerator InitializeCamera()

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// Waiting a little seem to avoid the Vuforia’s crashes.
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var isAutoFocus = CameraDevice.Instance.SetFocusMode(CameraDevice.FocusMode.FOCUS_MODE_CONTINUOUSAUTO);
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{
CameraDevice.Instance.SetFocusMode(CameraDevice.FocusMode.FOCUS_MODE_NORMAL);
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cameraInitialized = true;
StartCoroutine(“AtualizaCamera”);
}

IEnumerator UpdateCamera() {
    yield return new WaitForSeconds(0.5f);

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}
}

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if (cameraInitialized)
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try
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var cameraFeed = CameraDevice.Instance.GetCameraImage(Image.PIXEL_FORMAT.RGB888);

            if (cameraFeed == null)
            {
                return;
            }

            var data = barCodeReader.Decode(cameraFeed.Pixels, cameraFeed.BufferWidth, cameraFeed.BufferHeight, RGBLuminanceSource.BitmapFormat.RGB24);

            if (data != null)

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                if (data.ToString() == "panel")
	    {

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catch (Exception e)
{

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}
}
`

2

This is the complete code:

using UnityEngine;
using System;
using System.Collections;

using Vuforia;

using System.Threading;

using ZXing;
using ZXing.QrCode;
using ZXing.Common;
using UnityEngine.SceneManagement;

[AddComponentMenu(“System/VuforiaScanner”)]

public class QrCodeReader : MonoBehaviour {

private bool cameraInitialized;

private BarcodeReader barCodeReader;

void Start()
{
	barCodeReader = new BarcodeReader();
	StartCoroutine(InitializeCamera());
}

private IEnumerator InitializeCamera()
{
	// Waiting a little seem to avoid the Vuforia's crashes.
	yield return new WaitForSeconds(1.25f);

	var isFrameFormatSet = CameraDevice.Instance.SetFrameFormat(Image.PIXEL_FORMAT.RGB888, true);

	// Force autofocus.
	var isAutoFocus = CameraDevice.Instance.SetFocusMode(CameraDevice.FocusMode.FOCUS_MODE_CONTINUOUSAUTO);
	if (!isAutoFocus)
	{
		CameraDevice.Instance.SetFocusMode(CameraDevice.FocusMode.FOCUS_MODE_NORMAL);
	}
	cameraInitialized = true;
    StartCoroutine("AtualizaCamera");
}

IEnumerator UpdateCamera() {
    yield return new WaitForSeconds(0.5f);

    while (true) {

        yield return new WaitForSeconds(0.5f);
        ReadCode();
    }
}

private void ReadCode() {
    if (cameraInitialized)
    {
        try
        {
            var cameraFeed = CameraDevice.Instance.GetCameraImage(Image.PIXEL_FORMAT.RGB888);

            if (cameraFeed == null)
            {
                return;
            }

            var data = barCodeReader.Decode(cameraFeed.Pixels, cameraFeed.BufferWidth, cameraFeed.BufferHeight, RGBLuminanceSource.BitmapFormat.RGB24);

            if (data != null)
            {

                if (data.ToString() == "panel")
	    {
		SceneManager.LoadScene("panel");
                }
            }
        }
        catch (Exception e)
        {

        }
    }    
}