反应原生的 class 组件的功能组件

Question

is it right or wrong please help

This is my functional component code

 setaddCategories((prevState) => {
      return [...prevState, { category_name: "", expense_categories_id: 0 }];
    });

and here I turn it into class component

    this.setState({
      addCategories: (prevState) => {
        return [...prevState, { category_name: "", expense_categories_id: 0 }];
      },
    });

Answer 1

This is the way to get this (Updated)

this.setState(prevState => ({
  addCategories: {
     ...prevState.addCategories,
     category_name: "",
     expense_categories_id: 0
  }
}));