// app.js
App({
  onLaunch() {
    // 展示本地存储能力
    const logs = wx.getStorageSync('logs') || []
    logs.unshift(Date.now())
    wx.setStorageSync('logs', logs)

    // 登录
    wx.login({
      success: res => {
        // 发送 res.code 到后台换取 openId, sessionKey, unionId
      }
    })

    // 获取导航高度；
    wx.getSystemInfo({
      success: res => {
        //导航高度
        this.globalData.navHeight = res.statusBarHeight * (750 / res.windowWidth) + 94.5;
      }
    });
  },
  globalData: {
    userInfo: null,
    navHeight: 0,
  }
})