Unity实现引导页效果

Jill ·

更新时间:2024-09-20

· 889 次阅读

本文实例为大家分享了Unity实现引导页效果的具体代码，供大家参考，具体内容如下

效果图:

1、创建Canvas，设置RenderMode=ScreenSpace-Overlay，UIScaleMode = ScaleWithScreenSize，
ReferenceResolution（x=1080,y=1920）

2、创建一个RawImage，命名为（parentGoImg），并做如下设置

3、在parentGoImg下建几个RawImage，赋予想展示的图片，并做如下设置

4、添加如下脚本给parentGoImg


using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using DG.Tweening;
using UnityEngine.UI;
public class Asd : MonoBehaviour,IBeginDragHandler, IDragHandler,IEndDragHandler
{
  /// <summary>
  /// 可移动的最大最小X轴坐标
  /// </summary>
  private float minX, maxX;
  /// <summary>
  /// 开始触摸时，算出偏移值，防止跳变
  /// </summary>
  private float offsetX;
  /// <summary>
  /// 灵敏度
  /// </summary>
  private float sensitivityX;
  /// <summary>
  /// 当前显示第几页
  /// </summary>
  private int currentShowIndex = 1;
  private void Start()
  {
    (transform as RectTransform).pivot = new Vector2(0, 0.5f);
    Debug.Log(Screen.width + "  " + Screen.height);
    for (int i = 0; i < transform.childCount; i++)
    {
      (transform.GetChild(i) as RectTransform).sizeDelta = new Vector2(0, 0);
      //canvas的RenderMode要设置成Overlay形式
      //这里i*1080是因为canvas的UIScaleMode设置成了ScaleWithScreenSize，Resolution为x=1080,y=1920
      //如果canvas的UIScaleMode设置成ConstantPixelSize则吧这里的i*1080改成i*Screen.width
      (transform.GetChild(i) as RectTransform).anchoredPosition = new Vector2(i * 1080.0f, 0);
    }
    minX = -((transform.childCount - 1) * Screen.width);
    maxX = 0.0f;
    //如果移动超过页面的五分之一，则切换页面
    sensitivityX = Screen.width / 5;
  }
  public void OnBeginDrag(PointerEventData eventData)
  {
    offsetX = transform.position.x - Input.mousePosition.x;
  }
  public void OnDrag(PointerEventData eventData)
  {
    //将物体坐标限制在最大最小X轴坐标内
    transform.position = new Vector2(Input.mousePosition.x + offsetX, transform.position.y);
    if (transform.position.x <= minX)
    {
      transform.position = new Vector2(minX, transform.position.y);
    }
    else if (transform.position.x >= maxX)
    {
      transform.position = new Vector2(maxX, transform.position.y);
    }
  }
  public void OnEndDrag(PointerEventData eventData)
  {
    //判断坐标，是否需要切换页面
    if (transform.position.x > GetLeftX())
    {
      currentShowIndex--;
    }
    else if (transform.position.x < GetRightX())
    {
      currentShowIndex++;
    }
    transform.DOMoveX(-(currentShowIndex - 1) * Screen.width, 0.2f);
  }
  float GetLeftX() {
    return -((currentShowIndex - 1) * Screen.width - sensitivityX);
  }
  float GetRightX() {
    return -((currentShowIndex - 1) * Screen.width + sensitivityX);
  }
}

运行即可看到效果

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