/**
 * 将微信内通用方法转为promise
 * 如 wx.setStorage({key:XXX,data:XXX})
 * @param func 调用方法，如wx.setStorage
 * @param obj 调用参数对象，如{key:XXX,data:XXX}
 */
export const toPromise = (func, obj?:any) => {
  obj = obj || {};
  return new Promise((resolve, reject):any => {
    obj.success = (res) => {
      resolve(res);
    }
    obj.fail = (err) => {
      reject(err)
    }
    func(obj);
  });
}