unity中控制ScrollRect滚动显示指定的item
时间: 2024-02-28 15:53:23 浏览: 19
要控制ScrollRect滚动显示指定的item,可以通过以下步骤实现:
1.获取ScrollRect组件和需要显示的item的RectTransform组件。
```csharp
ScrollRect scrollRect = GetComponent<ScrollRect>();
RectTransform itemRect = item.GetComponent<RectTransform>();
```
2.计算需要滚动的距离。
```csharp
Vector2 itemPosition = itemRect.anchoredPosition;
Vector2 scrollPosition = scrollRect.content.anchoredPosition;
float distance = itemPosition.y - scrollPosition.y;
```
3.设置ScrollRect的滚动位置。
```csharp
scrollRect.content.anchoredPosition += new Vector2(0, distance);
```
完整代码示例:
```csharp
using UnityEngine;
using UnityEngine.UI;
public class ScrollRectController : MonoBehaviour
{
public GameObject item;
public void ScrollToItem()
{
ScrollRect scrollRect = GetComponent<ScrollRect>();
RectTransform itemRect = item.GetComponent<RectTransform>();
Vector2 itemPosition = itemRect.anchoredPosition;
Vector2 scrollPosition = scrollRect.content.anchoredPosition;
float distance = itemPosition.y - scrollPosition.y;
scrollRect.content.anchoredPosition += new Vector2(0, distance);
}
}
```
可以在需要滚动到指定item的地方调用ScrollToItem方法即可。