点击左右按钮循环展示图片

左右展示图片.png

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
//图片展示，点击左右按钮循环展示图片

public class ScrollImage2 : MonoBehaviour {
private Image image;
public Sprite[] spriteArray;
private Button leftImageButton;
private Image leftImageButton_Image;
private Button rightImageButton;
private Image rightImageButton_Image;
private void Awake()
{
image = transform.Find("ScrollImage2").GetComponent<Image>();
leftImageButton = transform.Find("LeftImageButton").GetComponent<Button>();
rightImageButton = transform.Find("RightImageButton").GetComponent<Button>();
leftImageButton_Image = transform.Find("LeftImageButton").GetComponent<Image>();
rightImageButton_Image = transform.Find("RightImageButton").GetComponent<Image>();

    leftImageButton.onClick.AddListener(LeftImageButtonClick);
    rightImageButton.onClick.AddListener(RightImageButtonClick);
}
void Start () {
    image.sprite = spriteArray[0];
    leftImageButton_Image.sprite = spriteArray[spriteArray.Length-1];
    rightImageButton_Image.sprite = spriteArray[1];
}
public void LeftImageButtonClick()
{
    for (int i = 0; i < spriteArray.Length; i++)
    {
        if (spriteArray[i] == image.sprite)
        {
            if (i > 0)
            {                  
                if (i==1)
                {
                    image.sprite = spriteArray[i - 1];
                    leftImageButton_Image.sprite = spriteArray[spriteArray.Length-1];
                    rightImageButton_Image.sprite = spriteArray[i];
                }
                else
                {
                    image.sprite = spriteArray[i - 1];
                    leftImageButton_Image.sprite = spriteArray[i - 2];
                    rightImageButton_Image.sprite = spriteArray[i];
                }
            }
            else
            {
                image.sprite = spriteArray[spriteArray.Length - 1];
                leftImageButton_Image.sprite = spriteArray[spriteArray.Length - 2];
                rightImageButton_Image.sprite = spriteArray[0];
            }
            break;
        }
    }
}
public void RightImageButtonClick()
{

    for (int i = 0; i < spriteArray.Length; i++)
    {
        if (spriteArray[i] == image.sprite)
        {
            if (i < spriteArray.Length - 1)
            {
                if (i== spriteArray.Length-2)
                {
                    image.sprite = spriteArray[i + 1];
                    leftImageButton_Image.sprite = spriteArray[i];
                    rightImageButton_Image.sprite = spriteArray[0];
                }
                else
                {
                    image.sprite = spriteArray[i + 1];
                    leftImageButton_Image.sprite = spriteArray[i];
                    rightImageButton_Image.sprite = spriteArray[i + 2];
                }
            }
            else
            {
                image.sprite = spriteArray[0];
                leftImageButton_Image.sprite = spriteArray[spriteArray.Length-1];
                rightImageButton_Image.sprite = spriteArray[1];
            }
            break;
        }

    }
}  

}