This script creates a Canvas, then a Panel with a Vertical Layout Group. It adds three buttons inside the panel. The buttons are arranged vertically with spacing and padding automatically applied.
using UnityEngine;
using UnityEngine.UI;
public class PanelLayoutExample : MonoBehaviour
{
void Start()
{
// Create a Canvas
var canvasGO = new GameObject("Canvas", typeof(Canvas), typeof(CanvasScaler), typeof(GraphicRaycaster));
var canvas = canvasGO.GetComponent<Canvas>();
canvas.renderMode = RenderMode.ScreenSpaceOverlay;
// Create a Panel
var panelGO = new GameObject("Panel", typeof(RectTransform), typeof(Image), typeof(VerticalLayoutGroup));
panelGO.transform.SetParent(canvasGO.transform, false);
var panelRect = panelGO.GetComponent<RectTransform>();
panelRect.sizeDelta = new Vector2(300, 400);
panelRect.anchoredPosition = Vector2.zero;
var panelImage = panelGO.GetComponent<Image>();
panelImage.color = new Color(0.8f, 0.8f, 0.8f, 0.5f); // light gray transparent
var layoutGroup = panelGO.GetComponent<VerticalLayoutGroup>();
layoutGroup.spacing = 10;
layoutGroup.padding = new RectOffset(10, 10, 10, 10);
layoutGroup.childAlignment = TextAnchor.UpperCenter;
// Create 3 Buttons as children
for (int i = 1; i <= 3; i++)
{
var buttonGO = new GameObject($"Button{i}", typeof(RectTransform), typeof(Button), typeof(Image));
buttonGO.transform.SetParent(panelGO.transform, false);
var buttonRect = buttonGO.GetComponent<RectTransform>();
buttonRect.sizeDelta = new Vector2(260, 60);
var buttonImage = buttonGO.GetComponent<Image>();
buttonImage.color = new Color(0.2f, 0.5f, 0.8f, 1f); // blue
var button = buttonGO.GetComponent<Button>();
// Add Text to Button
var textGO = new GameObject("Text", typeof(RectTransform), typeof(Text));
textGO.transform.SetParent(buttonGO.transform, false);
var text = textGO.GetComponent<Text>();
text.text = $"Button {i}";
text.alignment = TextAnchor.MiddleCenter;
text.color = Color.white;
text.font = Resources.GetBuiltinResource<Font>("Arial.ttf");
text.rectTransform.sizeDelta = buttonRect.sizeDelta;
}
}
}
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