Unity3D Button根据文本内容自适应大小

效果如图所示

实现：

1.Text添加ContentSizeFitter组件，如图所示：

 2.Button添加脚本TextAutoSize

public class TextAutoSize : MonoBehaviour
{
    public RectTransform textRect;//Text组件
    // Start is called before the first frame update
    void Start()
    {
        LayoutRebuilder.ForceRebuildLayoutImmediate(textRect);
        this.GetComponent<RectTransform>().sizeDelta = new Vector2(textRect.sizeDelta.x + 30, 40);
    }

    // Update is called once per frame
    void Update()
    {
        
    }
}