下面脚本实现的功能:
1.将本地图片(PNG和JPG)加载到UGUI上的Button的Image
2.用Scroll View组件自动排列
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;
using UnityEngine.UI;
public class Choose : MonoBehaviour
{
private GameObject canvas;
private Button _btn;
private GameObject button;
private List<Texture2D> images = new List<Texture2D>();
void Start()
{
canvas = GameObject.Find("Canvas/Scroll View/Viewport/Content");
load();
for (int i = 0; i < images.Count; i++)
{
button = new GameObject("Button" + i, typeof(Button), typeof(RectTransform), typeof(Image)); //创建一个GameObject 加入Button组件
button.transform.SetParent(this.canvas.transform); //把Canvas设置成Button的父物体
_btn = button.GetComponent<Button>(); //获得Button的Button组件
//先创建一个Texture2D对象,用于把流数据转成Texture2D
Sprite sprite = Sprite.Create(images[i], new Rect(0, 0, images[i].width, images[i].height), Vector2.zero);
button.GetComponent<Image>().sprite = sprite;
button.GetComponent<Button>().onClick.AddListener(ChooseButton);
}
}
/// <summary>
/// 加载文件夹内图片
/// </summary>
void load()
{
List<string> filePaths = new List<string>();
string imgtype = "*.BMP|*.JPG|*.GIF|*.PNG";
string[] ImageType = imgtype.Split('|');
for (int i = 0; i < ImageType.Length; i++)
{
//获取Application.dataPath文件夹下所有的图片路径
string[] dirs = Directory.GetFiles((Application.dataPath + "/Resources/Screenshot/"), ImageType[i]);
for (int j = 0; j < dirs.Length; j++)
{
filePaths.Add(dirs[j]);
}
}
for (int i = 0; i < filePaths.Count; i++)
{
Texture2D tx = new Texture2D(100, 100);
tx.LoadImage(getImageByte(filePaths[i]));
images.Add(tx);
}
}
/// <summary>
/// 根据图片路径返回图片的字节流byte[]
/// </summary>
/// <param name="imagePath">图片路径</param>
/// <returns>返回的字节流</returns>
private static byte[] getImageByte(string imagePath)
{
FileStream files = new FileStream(imagePath, FileMode.Open);
byte[] imgByte = new byte[files.Length];
files.Read(imgByte, 0, imgByte.Length);
files.Close();
return imgByte;
}
public void ChooseButton()
{
//UGUI上Button按钮事件
Debug.Log("按下了");
}
}