无法将类型“int"隐式转换为“bool"Unity [英] Cannot implicitly convert type `int' to `bool' Unity

问题描述

我在 Unity2d 上遇到脚本问题.这是控制台日志:"Assets/Scripts/themeswitch.cs(35,19): error CS0029: 无法将类型 int' 隐式转换为 bool'";"Assets/Scripts/themeswitch.cs(39,19): error CS0029: 无法将类型 int' 隐式转换为 bool'";我试图在这个论坛中搜索一个问题，但这不是我需要的.这是脚本:

I have a problem with a script on Unity2d. This is the console logs: "Assets/Scripts/themeswitch.cs(35,19): error CS0029: Cannot implicitly convert type int' to bool'" "Assets/Scripts/themeswitch.cs(39,19): error CS0029: Cannot implicitly convert type int' to bool'" I've tried to search a problem in this forum, but it was not what I needed. Here is the script:

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

public class themeswitch : MonoBehaviour {

    public GameObject lightbtn;
    public GameObject darkbtn;
    public GameObject lightmode;
    public GameObject darkmode;

    public void darktheme ()
    {
        darkbtn.SetActive(true);
        lightbtn.SetActive(false);
        lightmode.SetActive(false);
        darkmode.SetActive(true);
        Handheld.Vibrate();
        PlayerPrefs.SetInt("Theme", 1);
    }

    public void lighttheme ()
    {
        darkbtn.SetActive(false);
        lightbtn.SetActive(true);
        lightmode.SetActive(true);
        darkmode.SetActive(false);
        Handheld.Vibrate();
        PlayerPrefs.SetInt("Theme", 2);
    }

    void Start () 
    {
        if (PlayerPrefs.GetInt("Theme", 1)){
            darktheme();
        }

        if (PlayerPrefs.GetInt("Theme", 2)){
            lighttheme();
        }
    }
    
}

帮我解决这个问题，因为我是 unity 的新手！)谢谢)

Help me solve this problem, because i'm new at unity!) Thanks)

推荐答案

顾名思义 PlayerPrefs.GetInt 返回一个 int，而不是一个 bool.

As the name says PlayerPrefs.GetInt returns an int, not a bool.

您正在使用

if(PlayerPrefs.GetInt("Theme", 1))

存在三个问题:

• 首先，它不是 bool 而是 int
• 你多次使用它，这很昂贵
• 您使用它两次使用不同的默认返回值

你更想要的是读一遍

var themeIndex = PlayerPrefs.GetInt("Theme", 1);

其中 1 是 默认 值，如果没有找到带有 Theme 键的播放器首选项.

where 1 is the default value returned if there was no player prefs found with the key Theme.

然后做任何一个

if(themeIndex == 1)
{
    darktheme ();
}
else if(themeIndex == 2)
{
    lighttheme();
}
else
{
    // What if it is something else?
}

或者直接去switch-case

switch (themeIndex)
{
    case 1:
        darktheme();
        break;

    case 2:
        lighttheme();
        break;

    default:
        // What jf it is something else?
}

---

此外，在更改值后，您还应该调用保存它

---

Additionally after changing the value you should also save it calling

PlayerPrefs.Save();

否则这只能在 OnApplicationQuit

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