Why Does My Unity Game Manager Script Only Run Once, and How Can I Fix It?

Unity Game Manager: Unexpected script behavior

In your Unity project, you create a Game Manager script that is designed to be accessible across all scenes. However, you run into a problem where the script's functionality is only executed once after the simulation starts, although the object hosting the script persists across scene transitions.

Understand the concept of preloaded scenes

To resolve this issue, you must build a preload scene in your project. This is a critical step that is often overlooked in Unity documentation.

Steps to create a preloaded scene:

1. Create a scene called "preload": This scene must be specified as scene 0 in the build manager.
2. Add a game object named "__app": Place an empty game object in the preload scene named "__app" and attach the DontDestroyOnLoad component to it. This ensures that objects persist between scenes.
3. Additional Universal Behavior: Place any scripts or components that are critical to the overall functionality of the game (such as sound effects, scoring, and general management) on the "__app" object. These components are accessible throughout the project.

Locate common behavior in other scripts:

To access these common behaviors from other scripts across scenes, use the Object.FindObjectOfType method:

<code class="language-c#">Sound sound = Object.FindObjectOfType<Sound>();
Game game = Object.FindObjectOfType<Game>();</code>

Other tips:

• Always launch your game from the preload scene: This ensures that the "__app" object and its add-ons are loaded.
• Consider using a global access class: For a simpler solution, create a static class to directly access these common behaviors, eliminating the need to repeatedly call Object.FindObjectOfType.

Conclusion:

By implementing preloaded scenes and properly managing persistence of common behaviors, you can ensure that your game manager scripts work as expected in all scenes of your Unity project.

The above is the detailed content of Why Does My Unity Game Manager Script Only Run Once, and How Can I Fix It?. For more information, please follow other related articles on the PHP Chinese website!