How Can I Effectively Pass Data Between Scenes in Unity?

The efficient data transmission method between the unity scene

When switching scenes in Unity, data often needs to pass data between scenes. There are many ways to achieve this, and the specific method depends on the data type to be passed.

Static variables

If the data is the basic data type (INT, BOOL, String, etc.), it is not inherited from Monobehaviour and is not a GameBject, you can mark it as a static variable. Static variables retain their value when switching scenes.

Dontdestroyonload

Objects inherited from Monobehaviour or GameObject can be retained using the Dontdestroyonload function. This prevents GameObject from being destroyed when the scene is uninstalled. By adding a script containing this function to the object, its variables will be kept accessible in the next scene. Playerprefs

PlayerPrefs is the API of Unity, allowing a small amount of data to store a small amount of data, such as key value pairs. It can be used to store basic data, such as scores or settings.

File IO serialization

For a large amount of data or complex objects, you can use serialized file formats such as JSON or binary. You can create a custom class to represent the game data, and then use the C#file API (such as File.writeAllBytes and File.readallBytes) to serialize it to the file.

Case: Transfer scores

In the sample code, PlayerPrefs.Setint and PlayerPrefs.getint are used to pass the score value to the next scene. However, after the score is stored, there is no switching of the scene, so the loaded scene cannot access the updated value. The code should be modified as follows:

Scene 1:

Scene 2:

This modification ensures the use of PlayerPrefs to save the current score, and the new scenario uses the saved scores to initialize, and then reset PlayerPREFS.

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