开发一个 For 循环代码，一次只实例化 3 个数组对象

Question

所以我有一些代码来创建一个动态画廊，该画廊创建一个文件位置的主数组，一个将图像加载到纹理中的加载器协程，以及一个实例化获取纹理的预制件的函数，将其添加为一个精灵，然后相应地为预制件父母。最后一个for循环重复这个过程，直到我遍历整个文件数组并用所有图像填充我的画廊。这适用于小型画廊，但随着我的画廊的增长，它会变得笨拙并开始占用大量内存。我的问题是如何修改此代码以一次仅加载 3 张图像（左中右）？我将所有图像都放在滚动容器中，并且我希望能够知道图像何时滑出屏幕作为加载下一个（或上一个）的信号。有没有人在此之前不介意分享一点代码？

public Texture2D tex;
public string[] galleryImages;

GameObject galleryThumbHolder;
string[] arctopithecusImages;
string[] arctopithecusPNGImages;
string[] gulonImages;
string[] scythianWolfImages;
string[] simivulpaImages;
string[] succorathImages;
string[] tatusImages;

int currentIndex = 0;

// Create a master Array of all image files located in all Image locations
void Start()
{
    // Build Gallery Arrays
    arctopithecusImages = Directory.GetFiles(@"/Users/kenmarold/Screenshots/ARCTOPITHECUS/", "*.jpg");
    arctopithecusPNGImages = Directory.GetFiles(@"/Users/kenmarold/Screenshots/ARCTOPITHECUS/", "*.png");
    gulonImages = Directory.GetFiles(@"/Users/kenmarold/Screenshots/GULON/", "*.jpg");
    scythianWolfImages = Directory.GetFiles(@"/Users/kenmarold/Screenshots/SCYTHIAN-WOLF/", "*.png");
    simivulpaImages = Directory.GetFiles(@"/Users/kenmarold/Screenshots/SIMIVULPA/", "*.png");
    succorathImages = Directory.GetFiles(@"/Users/kenmarold/Screenshots/SUCCORATH/", "*.png");
    tatusImages = Directory.GetFiles(@"/Users/kenmarold/Screenshots/TATUS/", "*.png");
    // Concatenate all Folder Array into single Array
    galleryImages = 
        arctopithecusImages.Concat(arctopithecusPNGImages)
            .Concat(gulonImages)
            .Concat(scythianWolfImages)
            .Concat(simivulpaImages)
            .Concat(succorathImages)
            .Concat(tatusImages)
            .ToArray();

    for(int i = 0; i < galleryImages.Length; i++)
    {
        StartCoroutine("loader", currentIndex);
        currentIndex++;
    }
}

IEnumerator loader(int indexNum)
{
    WWW www = new WWW("file://" + galleryImages[indexNum]);         // get the first file from disk

    yield return www;                                               // Wait unill its loaded
    tex = new Texture2D(512,512);                                   // create a new Texture2D
    www.LoadImageIntoTexture(tex);                                  // put the image file into the new Texture2D

    createGalleryImages(tex);
}

public void createGalleryImages(Texture2D tex)
{
    // Instantiate Gallery Thumb Prefab and Load in Sprite
    //GameObject galleryThumb = Instantiate(Resources.Load("Prefabs/GalleryImageHolder")) as GameObject;
    GameObject galleryThumb = Instantiate(GameObject.FindGameObjectWithTag("GalleryImgHolder")) as GameObject;
    Image galleryImg = galleryThumb.GetComponent<Image>();

    Rect rct = new Rect(0, 0, tex.width, tex.height);               // Define Rect arg
    Vector2 pvt = new Vector2(0.5f, 0.5f);                          // Define Pivot arg
    galleryImg.sprite = Sprite.Create(tex, rct, pvt);

    // Set Gallery Thumb Parent
    galleryThumb.transform.SetParent(GameObject.FindGameObjectWithTag("GalleryThumbs").transform);
}

Answer 1

我曾经做过类似的事情，我实现它的方式是使用触发器，它检测输入对象并获取分配给该对象的索引，在这种情况下可能是数组中图像的索引，这种方式您可以知道哪个是您在中心显示的当前图像，并且可以在用户向左或向右滚动时加载另一张图像。 希望对您有所帮助。