Create cards and make them buttons

Assets/Battle/BattlePlayerControls.cs

@@ -0,0 +1,51 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class BattlePlayerControls : MonoBehaviour
+{
+    public GameObject uiCanvas;
+    public GameObject cardPrefab;
+
+    public delegate void CardUsedAction(int i);
+    public event CardUsedAction OnCardUsed;
+
+    private List<GameObject> cardsInHand;
+
+    // Start is called before the first frame update
+    void Start()
+    {
+        
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        
+    }
+
+    public void SetHand(int numberOfCards) {
+        this.cardsInHand = new List<GameObject>();
+        for (int i = 0; i < numberOfCards; i++) {
+            GameObject newCard = Instantiate(this.cardPrefab, this.uiCanvas.transform);
+            this.cardsInHand.Add(newCard);
+            newCard.transform.position = CalculateCardPosition(i, numberOfCards);
+            Button button = newCard.GetComponent<Button>();
+            int cardIndex = i;
+            button.onClick.AddListener(delegate {OnCardClicked(cardIndex);});
+        }
+    }
+
+    private Vector3 CalculateCardPosition(int index, int count) {
+        const int CARD_SIZE = 120;
+        const int SPACING = 8;
+        const int DELTA = CARD_SIZE + SPACING;
+        
+        return new Vector3(Screen.width * 0.5f - DELTA / 2 * (count - 1) + DELTA * index, 160, 0);
+    }
+
+    private void OnCardClicked(int index) {
+        OnCardUsed(index);
+    }
+}