Unity的C#编程教程_29_switch语句挑战1

• 2020 年 8 月 15 日
• AI
• C/C++/C#

• 进行 3 装状态切换：攻击，防御，站立
• 分别对应按下按键：A，D，S
• 将程序从 if else 转化为 switch

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

public class StanceChange : MonoBehaviour
{

    public int state;
    public string show; // 用于在 unity 中可见效果

    // Start is called before the first frame update
    void Start()
    {
        state = 0; // 默认状态为站立
    }

    // Update is called once per frame
    void Update()
    {
        // 切换状态
        if (Input.GetKeyDown(KeyCode.A))
        {
            state = 1;
        }
        else if (Input.GetKeyDown(KeyCode.D))
        {
            state = 2;
        }
        else if (Input.GetKeyDown(KeyCode.S))
        {
            state = 0;
        }

        // 显示状态
        if (state == 1)
        {
            show = "Atack";
        }
        else if (state == 2)
        {
            show = "Defence";
        }
        else
        {
            show = "Stand";
        }

    }
}

• 注意，这里状态切换部分代码是没有办法用 switch 语句的
• switch 仅适用于状态显示部分代码

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

public class StanceChange : MonoBehaviour
{

    public int state;
    public string show; // 用于在 unity 中可见效果

    // Start is called before the first frame update
    void Start()
    {
        state = 0; // 默认状态为站立
    }

    // Update is called once per frame
    void Update()
    {
        // 切换状态
        if (Input.GetKeyDown(KeyCode.A))
        {
            state = 1;
        }
        else if (Input.GetKeyDown(KeyCode.D))
        {
            state = 2;
        }
        else if (Input.GetKeyDown(KeyCode.S))
        {
            state = 0;
        }

        // 显示状态
        /*
        if (state == 1)
        {
            show = "Atack";
        }
        else if (state == 2)
        {
            show = "Defence";
        }
        else
        {
            show = "Stand";
        }
        */

        switch (state)
        {
            case 1:
                show = "Atack";
                break;

            case 2:
                show = "Defence";
                break;

            default:
                show = "Stand";
                break;
        }

    }
}