卡在这个错误上：不允许主构造函数体

Question

我在 Youtube 上观看了一些教程，了解我想要在 Unity 项目中使用的脚本。 在 28:13 分钟内https://www.youtube.com/watch?v=b87iVclVT2E，您可以看到脚本的重要部分，这是我的副本：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerMovement : MonoBehaviour {

    public CharacterController2D controller;
    public Animator animator;

    public float runSpeed = 40f;

    float horizontalMove = 0f;
    bool jump = false;
    bool crouch = false;

    void Update(){
        horizontalMove = Input.GetAxisRaw ("Horizontal") * runSpeed;

        animator.SetFloat ("Speed", Mathf.Abs (horizontalMove));

        if (Input.GetButtonDown("Jump"))
        {
            jump = true;
            animator.SetBool("IsJumping", true);
        }

        if (Input.GetButtonDown("Crouch"))
        {
            crouch = true;
        } else if (Input.GetButtonUp("Crouch"))
        {
            crouch = false;
        }
    }

    public void OnLanding ()
    {
        animator.SetBool ("IsJumping", false);
    }

    public void OnCrouching (bool isCrouching);
    {
        animator.SetBool("IsCrouching", isCrouching);
    }

    void FixedUpdate ()
    {
        controller.Move (horizontalMove * Time.fixedDeltaTime, crouch, jump);
        jump = false;
    }
}   

当我尝试时，Unity 响应了以下错误：

Assets/PlayerMovement.cs(42,2): error CS9010: Primary constructor body is not allowed
Assets/PlayerMovement.cs(47,2): error CS9010: Primary constructor body is not allowed
Assets/PlayerMovement.cs(47,2): error CS8041: Primary constructor body is not allowed

如何修复这些错误？

Answer 1

问题是在这行代码中不应该出现分号：

public void OnCrouching (bool isCrouching); //there should not be a semicolon here
{
    animator.SetBool("IsCrouching", isCrouching);
}

更改为

public void OnCrouching (bool isCrouching)
{
    animator.SetBool("IsCrouching", isCrouching);
}