"tabBar": {
    "list": [
        {
        	//页面路径，必须在 pages 中先定义
            "pagePath": "pages/home/home",
            //tab 上按钮文字
            "text": "home",
            //图片路径,当 position 为 top 时，不显示 icon
            "iconPath": "./icon/首页_home.png",
            //选中时的图片路径
            "selectedIconPath": "./icon/首页_home (1).png"
        },
        {
            "pagePath": "pages/shopping/shopping",
            "text": "shopping",
            "iconPath": "./icon/购物车_shopping.png",
            "selectedIconPath": "./icon/购物车_shopping (1).png"
        }
    ],
    "color": "#666",
    "selectedColor": "#2F88FF",
    "backgroundColor": "#eee",
    "borderStyle": "white"
},

"window": {
	//下拉 loading 的样式，仅支持 dark / light
    "backgroundTextStyle": "dark",
     //是否开启全局的下拉刷新。
    "enablePullDownRefresh": true,
    //窗口的背景色
    "backgroundColor": "#fcf",
    //导航栏背景颜色
    "navigationBarBackgroundColor": "#ccf",
    //导航栏标题文字内容
    "navigationBarTitleText": "day01",
    //导航栏标题颜色，仅支持 black / white
    "navigationBarTextStyle": "black"
},

<checkbox data-num="{{num}}" checked="{{checked}}" />

<checkbox checked="{{false}}" />

<view>{{obj.name}}</view>
<view>{{arr[0]}}</view>

const app = getApp()
const safeAreaHeight = app.globalData.safeAreaHeight

<!-- 跳转到tab页面 -->
<button bindtap="toTabB">跳转到tabB页面</button>
<!-- 导航组件方式 -->
<navigator url="../tabB/tabB" open-type="switchTab">跳转到tabB页面</navigator>

toTabB() {
    wx.switchTab({
        url: '../tabB/tabB',
    })
}

<!-- 跳转到普通页面 -->
<button bindtap="toPageX">跳转到普通页面</button>
<!-- 导航组件方式 -->
<navigator url="../x/x?a=1" open-type="navigate">跳转到普通页面</navigator>

toPageX() {
    wx.navigateTo({
        url: '../x/x?a=1&b=2&id=3',
    })
}

<button bindtap="goBack">返回上一页</button>
<navigator open-type="navigateBack" delta="1">返回上一页</navigator>

goBack() {
    wx.navigateBack({
        delta: 1,
    })
},

<button bindtap="reLaunchToZ">重启动到页面z</button>
<navigator url="../z/z" open-type="reLaunch">重启动到页面z</navigator>

reLaunchToZ() {
    wx.reLaunch({
        url: '../z/z',
    })
},

<button bindtap="redirectToZ">重定向到页面z</button>
<navigator url="../z/z" open-type="redirect">重定向到页面z</navigator>

redirectToZ() {
    wx.redirectTo({
        url: '../z/z',
    })
},

<wxs src="../wxs/price.wxs" module="priceModule" />
<view>
    <!-- {{price.toFixed(2)}} -->
    {{price2}}//通过this.setData修改

    {{priceModule.handlePrice(price)}}
    {{priceModule.handlePrice2(price)}}
</view>

function handlePrice(price) {
    return price.toFixed(2)
}

function handlePrice2(price) {
    return price.toFixed(2) + '元'
}

module.exports = {
    handlePrice: handlePrice,
    handlePrice2: handlePrice2
}

	  		success() {},     //成功的回调函数，代表存储成功

	 })

App({
    onLaunch() {
        wx.getSystemInfo({
            success: (res) => {
                // console.log(res);
                const {
                    screenHeight,
                    safeArea
                } = res
                let safeAreaHeight = screenHeight - safeArea.bottom
                wx.setStorageSync('safeAreaHeight', safeAreaHeight)
            },
        })
    }
})

Page({
    data: {
        safeAreaHeight: 0
    },    
    onLoad() {
        const safeAreaHeight = wx.getStorageSync('safeAreaHeight')
        this.setData({
            safeAreaHeight
        })
    },
})

<view style="padding-bottom: {{safeAreaHeight}}px;">xxx</view>

App({
    globalData: {
        safeAreaHeight: 0
    },
    onLaunch() {
        wx.getSystemInfo({
            success: (res) => {
                // console.log(res);
                let {
                    screenHeight,
                    safeArea
                } = res
                this.globalData.safeAreaHeight = screenHeight - safeArea.bottom
                console.log(this.globalData.safeAreaHeight);
            },
        })
    }
})

let app = getApp()
Page({
    data: {
        safeAreaHeight: app.globalData.safeAreaHeight
    }
})

<button bindtap="handleGetUserProfile">获取用户信息</button>

handleGetUserProfile() {
    wx.getUserProfile({
    	//必须写desc
        desc: "用于完善会员资料", //声明获取用户个人信息后的用途，后续会展示在弹窗中，请谨慎填写
        success: (res) => {
            console.log(res);
        },
        fail: (err) => {
            console.log(err);
        },
    });
},

<button open-type="chooseAvatar" bind:chooseavatar="handChooseAvatar">获取用户头像</button>
<image src="{{avatarUrl}}" style="width: 100rpx;height: 100rpx;" />

handChooseAvatar(e) {
    console.log(e);
    this.setData({
        avatarUrl: e.detail.avatarUrl
    })
}

<input type="nickname" placeholder="获取用户昵称" value="{{nickname}}" bindinput="handleInput" />
<view>昵称:{{nickname}}</view>

// 获取用户昵称，监听用户名称输入，pc端模拟器会有问题
handleInput(e) {
    console.log(e);
    this.setData({
        nickname: e.detail.value
    })
}

<button open-type="getPhoneNumber" bindgetphonenumber="getPhoneNum">获取手机号</button>

//把e.detail.code通过接口给后端，后端拿到code后去微信后台换取手机号，然后再通过接口把手机号传给前端
getPhoneNum(e) {
    console.log(e);
},

<button bindtap="handleOpenSetting">点击授权地理位置</button>

onShow() {
    // 获取地理位置
    wx.getLocation({
        type: 'wgs84', //gps坐标
        // 如果授权过一次，后续用wx.getLocation获取地理位置默认都是成功
        success(res) {
            console.log(res);
            const latitude = res.latitude
            const longitude = res.longitude
            const speed = res.speed
            const accuracy = res.accuracy
        },
        // 如果拒绝过一次，后续用wx.getLocation获取地理位置默认都是失败
        fail: err => {
            console.log(err);
        }
    })
},
handleOpenSetting() {
    wx.openSetting()
},

"requiredPrivateInfos": [
    "getLocation"
],
"permission": {
    "scope.userLocation": {
        "desc": "收集地理位置为了更好的服务"  //接口用途说明
    }
}

"requiredPrivateInfos": [
    "chooseLocation"
],

handleChooseLocation() {
    wx.chooseLocation({
        success: (res) => {
            console.log(res);
        },
        fail: (err) => {
            console.log(err);
        }
    })
}

{
  "pages":[
    xxx
  ],
  "subpackages": [
    {
      "root": "packageA",
      "pages": [
        "pages/cat",
        "pages/dog"
      ]
    }, {
      "root": "packageB",
      "name": "pack2",
      "pages": [
        "pages/apple",
        "pages/banana"
      ]
    }
  ]
}

onCheck() {
    wx.downloadFile({
        url: "https://hxyyxy.nwsuaf.edu.cn/docs/2020-08/db2f3058866c4280ac9b2e05410ea87c.pdf",
        success: function (res) {
            const filePath = res.tempFilePath;  //临时文件夹路径
            wx.openDocument({
                filePath: filePath,
            });
        },
    });
}