微信小程序开发中Promise的使用(aysnc,await)及场景分析

<strong>// API请求工具函数
const apiRequest = (url, method = 'GET', headers = {}) => {
  return new Promise((resolve, reject) => {
    wx.request({
      url,
      method,
      header: headers,
      success: (res) => resolve(res),
      fail: (error) => reject(error)
    });
  });
};
const fetchTypelist = async () => {
  const app = getApp();
  const queryParams = app.globalData.queryParams;
  console.log(queryParams)
  let url = `${API_BASE_URL}/industryType/page?pageNo=1&pageSize=10`;
  // 添加常规的查询参数
  for (const [key, value] of Object.entries(queryParams)) {
    if (value) {
      url += `&${key}=${encodeURIComponent(value)}`;
    }
  }
  try {
    const headers = {}; // 如果需要token,可以在这里添加
    const response = await apiRequest(url, 'GET', headers);
    if (response.data.code === 200) {
      console.log(response.data)
      return response
    } else {
      throw new Error('获取地址列表失败');
    }
  } catch (error) {
    throw error;
  }
};
/.................../
调用方法
let result = fetchTypelist()
console.log(result)</strong>

<strong>const getTypelist = async () => {
  try {
    const typelist = await fetchTypelist();
    console.log(typelist); // 这里可以获取到返回的 rows
  } catch (error) {
    console.error(error); // 处理错误
  }
};</strong>

<strong>fetchTypelist()
  .then((typelist) => {
    console.log(typelist);
  })
  .catch((error) => {
    console.error(error);
  });</strong>