# Flutter : LateInitializationError: Field ‘data’ has not been initialized

You don’t want a late variable, you want a nullable one. If you need to check if something is initialized, you should be using a nullable variable instead and your code is already set up to check for null

just change

to

E.g.

change to

#### 参考链接

Flutter : LateInitializationError: Field ‘data’ has not been initialized, got error