浏览器嵌入，国旗文件

Assets/Resources/Circle/ImageWithRoundedCorners.cs

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+using DG.Tweening;
+using System;
+using UnityEngine;
+using UnityEngine.UI;
+
+[ExecuteInEditMode]
+public class ImageWithRoundedCorners : MonoBehaviour {
+	private static readonly int Props = Shader.PropertyToID("_WidthHeightRadius");
+
+	private Material material;
+	public float radius;
+    private void Start()
+    {
+		Refresh();
+	}
+    void OnRectTransformDimensionsChange()
+    {
+		Refresh();
+	}
+
+    private void OnValidate()
+    {
+        Refresh();
+    }
+
+    private void Refresh(){
+		if (material == null)
+		{
+			material = Instantiate(Resources.Load<Material>("UI/Material/RoundedCornersTextureMaterial"));
+		}
+		var rect = ((RectTransform)transform).rect;
+		material.SetVector(Props, new Vector4(rect.width, rect.height, radius * 2, 0));
+		if (gameObject.GetComponent<Image>() != null)
+		{
+			gameObject.GetComponent<Image>().material = material;
+			gameObject.GetComponent<Image>().sprite = null;
+		}
+		else if (gameObject.GetComponent<RawImage>() != null)
+		{
+			gameObject.GetComponent<RawImage>().material = material;
+		}
+	}
+}