Text Bg ContentSizeFitter的另类控制

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

[RequireComponent(typeof(ContentSizeFitter))]
public class textBgControl :UIBehaviour
{
    public RectTransform parentRectTrans;
    private RectTransform rectTransform;

    protected override void Start()
    {
        rectTransform = GetComponent<RectTransform>();
    }
    protected override void OnRectTransformDimensionsChange()
    {
        float height = GetWidthOrHeight(RectTransform.Axis.Vertical);
        parentRectTrans.sizeDelta = new Vector2(parentRectTrans.sizeDelta.x,height);
    }

    public float GetWidthOrHeight(RectTransform.Axis axis)
    {
        if (axis == RectTransform.Axis.Horizontal)
            return rectTransform.rect.width;
        return rectTransform.rect.height;
    }

}

　　

using UnityEngine;
using UnityEngine.UI;

public class Test : MonoBehaviour
{
    public Text Text;

    void Start()
    {
        RectTransform rect = Text.GetComponent<RectTransform>();
        // 获取Text的Size
        Vector2 v2 = rect.rect.size;

        Text.text = "这是一堆文字，具体多少我也不知道，反正就是一堆文字";

        // width保持不变
        rect.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, v2.x);
        // 动态设置height
        rect.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, Text.preferredHeight);
    }
}

　　https://blog.csdn.net/weixin_43149049/article/details/104005050