/// <reference types="react" />
interface Response<T> {
    success: true;
    data: T;
}
interface FailResponse {
    success: false;
    err_code: number;
    err_msg: string;
}
/**
 * 请求数据
 * @param apiFn ()=> api.request({params})
 * @param defaultData 请求失败的默认data
 * @returns
 */
declare type FetchFn<T> = () => Promise<FailResponse | Response<T>>;
export declare const useData: <T>(apiFn: FetchFn<T>, defaultData?: T | undefined) => {
    data: T | undefined;
    reFetchData: () => Promise<void>;
    setData: import("react").Dispatch<import("react").SetStateAction<T | undefined>>;
};
export {};