Unity MeshRenderer rendering sorting problem (setting of SortingLayer and order in layer)

In a 3d project, such as creating a cube, there are no two fields, sorting layer and order in layer, in the Inspector. If you need to change the sorting, we can write directly through the script; you can also write the editor script to display the two fields sorting layer and order in layer in the Inspector and set them.

1. Script writing:

using UnityEngine;

public class MeshRendererSorting : MonoBehaviour
{
    private MeshRenderer meshRenderer;
    void Start()
	{
        meshRenderer = GetComponent<MeshRenderer>();
        meshRenderer.sortingLayerName = "UI";
        meshRenderer.sortingOrder = 3;
	}
}

2. Write the editor script to display the sort field

using UnityEngine;
using UnityEditor;

[CustomEditor(typeof(MeshRenderer))]
public class MeshRendererEditor : Editor
{
    MeshRenderer meshRenderer;
    public override void OnInspectorGUI()
    {
        base.OnInspectorGUI();
        meshRenderer = target as MeshRenderer;

        string[] layerNames = new string[SortingLayer.layers.Length];
        for (int i = 0; i < SortingLayer.layers.Length; i++)
            layerNames[i] = SortingLayer.layers[i].name;

        int layerValue = SortingLayer.GetLayerValueFromID(meshRenderer.sortingLayerID);
        layerValue = EditorGUILayout.Popup("Sorting Layer", layerValue, layerNames);

        SortingLayer layer = SortingLayer.layers[layerValue];
        meshRenderer.sortingLayerName = layer.name;
        meshRenderer.sortingLayerID = layer.id;
        meshRenderer.sortingOrder = EditorGUILayout.IntField("Order in Layer", meshRenderer.sortingOrder);
    }
}

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