unity 实现图片拖拽移动

在Unity中，您可以通过以下步骤来实现图片拖拽移动：

1. 创建一个空物体，并将其命名为“ImageContainer”。

2. 在ImageContainer下创建一个RawImage，并将其命名为“Image”。

3. 为RawImage添加一个BoxCollider组件，并将其勾选为“Is Trigger”。

4. 为ImageContainer添加一个脚本，并在脚本中添加以下代码：

using UnityEngine;

public class ImageDrag : MonoBehaviour
{
    private bool isDragging = false;
    private Vector3 startPosition;
    private float deltaX, deltaY;

    void Update()
    {
        if (isDragging)
        {
            Vector3 mousePosition = Input.mousePosition;
            mousePosition.z = 10.0f; // Set this to be the distance you want the object to be placed in front of the camera.
            transform.position = Camera.main.ScreenToWorldPoint(mousePosition) + new Vector3(deltaX, deltaY, 0);
        }
    }

    private void OnMouseDown()
    {
        isDragging = true;
        startPosition = transform.position;
        Vector3 mousePosition = Input.mousePosition;
        mousePosition.z = 10.0f; // Set this to be the distance you want the object to be placed in front of the camera.
        Vector3 objectPosition = Camera.main.ScreenToWorldPoint(mousePosition);
        deltaX = objectPosition.x - transform.position.x;
        deltaY = objectPosition.y - transform.position.y;
    }

    private void OnMouseUp()
    {
        isDragging = false;
        if (transform.position.y < -3) // Set this to be the y-coordinate where you want the object to snap back to its starting position.
        {
            transform.position = startPosition;
        }
    }
}

5. 在Unity编辑器中，选择ImageContainer并将Image拖放到RawImage的Texture属性中。

现在，您可以在场景中拖动ImageContainer来移动图片。当您松开鼠标时，如果图片的位置低于指定的y坐标，它将自动回到其起始位置。