我在主菜单做了一个调整游戏音量的滑块，但是当场景切换到实际游戏时音乐恢复正常？

Question

how can i make it so changes i made in the main menu scene are carried over into the game scene?

below is the code i used for the music player.

// Reference to Audio Source component
private AudioSource audioSrc;

// Music volume variable that will be modified
// by dragging slider knob
private float musicVolume = 1f;

// Use this for initialization
void Start()
{

    // Assign Audio Source component to control it
    audioSrc = GetComponent<AudioSource>();
}

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

    // Setting volume option of Audio Source to be equal to musicVolume
    audioSrc.volume = musicVolume;
}

// Method that is called by slider game object
// This method takes vol value passed by slider
// and sets it as musicValue
public void SetVolume(float vol)
{
    musicVolume = vol;
}

Answer 1

There are a few options

1. Make the musicVolume a static so the value is "shared" between all instances of that class.

    private static float musicVolume = 1.0f;

2. Or use DontDestroyOnLoad to use allways the same component in all Scenes.

    private void Awake () { DontDestroyOnLoad(gameObject); }

   but than make sure you have that object with this component only included once in the first Scene so you don't have multiple objects later.

3. you could use a ScriptableObject for this kind of settings. This is more powerful and flexible and "orthodox" than using a static value.

   It is a bit more complicated to get into this but it is worth it. Here is a tutorial .

    [CreateAssetMenu(fileName = "New SettingsAsset", menuName = "Example/SettingsAsset"] public class SettingsAsset : ScriptableObject { public float musicVolume = 1.0f; }

   create one SetttingsAsset by right click in the ProjectView (Assets) and in the menu find Example -> SettingsAsset

   and than reference these settings in all Scenes and components wherever needed. In this case eg

   // Reference in the inspector public SettingsAsset settings; // ... // Though I doubt you would need to do this in Update // If you only change the settings from within a separate settings scene // you probably should do this only once private void Update() { audioSrc.volume = settings.musicVolume; }