使用Text(TMP)需要引用命名空间TMPro
组件的名称为TMP_Text

using TMPro

public class UIManager : MonoBehaviour
{
    public TMP_Text testMeshPro;

    private void Start() {
        testMeshPro.text = "This is a test sentence";
    }
}

感谢 https://blog.csdn.net/qq_37672864/article/details/104502501