JSON serialization in Unity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is JSON serialization in Unity?

JSON serialization is the process of converting Unity objects or data into a JSON string format that can be saved or sent, and later converted back to objects.

beginner

Which Unity class is commonly used for JSON serialization?

Unity uses the JsonUtility class to convert objects to JSON strings and back.

beginner

How do you convert an object to a JSON string in Unity?

Use JsonUtility.ToJson(yourObject) to get a JSON string representing your object.

beginner

How do you convert a JSON string back to an object in Unity?

Use JsonUtility.FromJson<T>(jsonString) where T is the type of the object you want to create.

intermediate

What is a limitation of Unity's JsonUtility for serialization?

JsonUtility only works with classes or structs marked as serializable and does not support dictionaries or complex types well.

Which method converts an object to a JSON string in Unity?

A JsonUtility.ParseJson()

B JsonUtility.FromJson()

C JsonConvert.SerializeObject()

D JsonUtility.ToJson()

JsonUtility.ToJson() converts an object to a JSON string.

What must a class have to be serialized by JsonUtility in Unity?

A Inherit from MonoBehaviour

B Be marked with [Serializable]

C Be a static class

D Implement ISerializable

Classes must be marked with [Serializable] to be serialized by JsonUtility.

Which of these is NOT supported well by Unity's JsonUtility?

A Dictionaries

B Structs

C Simple classes

D Arrays

Dictionaries are not supported well by JsonUtility.

How do you deserialize a JSON string to an object of type PlayerData?

A JsonUtility.FromJson<PlayerData>(jsonString)

B JsonUtility.ToJson<PlayerData>(jsonString)

C JsonUtility.Deserialize<PlayerData>(jsonString)

D JsonUtility.Parse<PlayerData>(jsonString)

Use JsonUtility.FromJson(jsonString) to deserialize.

What is the output type of JsonUtility.ToJson()?

A JSON object

B byte[]

C string

D object

JsonUtility.ToJson() returns a string containing JSON text.

Explain how JSON serialization works in Unity using JsonUtility.

Think about converting objects to strings and back.

What are some limitations of Unity's JsonUtility for JSON serialization?

Consider what data structures JsonUtility cannot handle well.