【微信小程序】实现底部菜单栏

第一步：引入底部菜单栏组件（actionsheet）

贴代码咯：
actionsheet.js

module.exports =
  (function (modules) {
    var installedModules = {};
    function __webpack_require__(moduleId) {
      if (installedModules[moduleId]) {
        return installedModules[moduleId].exports;
      }
      var module = installedModules[moduleId] = {
        i: moduleId,
        l: false,
        exports: {}
      };
      modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);

      module.l = true;
      return module.exports;
    }
    __webpack_require__.m = modules;
    __webpack_require__.c = installedModules;
    __webpack_require__.d = function (exports, name, getter) {
      if (!__webpack_require__.o(exports, name)) {
        Object.defineProperty(exports, name, { enumerable: true, get: getter });
      }
    };
    __webpack_require__.r = function (exports) {
      if (typeof Symbol !== 'undefined' && Symbol.toStringTag) {
        Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
      }
      Object.defineProperty(exports, '__esModule', { value: true });
    };
    __webpack_require__.t = function (value, mode) {
      if (mode & 1) value = __webpack_require__(value);
      if (mode & 8) return value;
      if ((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
      var ns = Object.create(null);
      __webpack_require__.r(ns);
      Object.defineProperty(ns, 'default', { enumerable: true, value: value });
      if (mode & 2 && typeof value != 'string') for (var key in value) __webpack_require__.d(ns, key, function (key) { return value[key]; }.bind(null, key));
      return ns;
    };
    __webpack_require__.n = function (module) {
      var getter = module && module.__esModule ?
        function getDefault() { return module['default']; } :
        function getModuleExports() { return module; };
      __webpack_require__.d(getter, 'a', getter);
      return getter;
    };
    __webpack_require__.o = function (object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
    __webpack_require__.p = "";
    return __webpack_require__(__webpack_require__.s = 1);
  })
    ([
/* 0 */,
      (function (module, exports, __webpack_require__) {

        "use strict";


        Component({
          options: {
            multipleSlots: true,
            addGlobalClass: true
          },
          properties: {
            title: {
              type: String,
              value: ''
            },
            showCancel: {
              type: Boolean,
              value: true
            },
            cancelText: {
              type: String,
              value: '取消'
            },
            maskClass: {
              type: String,
              value: ''
            },
            extClass: {
              type: String,
              value: ''
            },
            maskClosable: {
              type: Boolean,
              value: true
            },
            mask: {
              type: Boolean,
              value: true
            },
            show: {
              type: Boolean,
              value: false
            },
            actions: {
              type: Array,
              value: [],
              observer: '_groupChange'
            }
          },
          methods: {
            _groupChange: function _groupChange(e) {
              if (e.length > 0 && typeof e[0] !== 'string' && !(e[0] instanceof Array)) {
                this.setData({
                  actions: [this.data.actions]
                });
              }
            },
            buttonTap: function buttonTap(e) {
              var _e$currentTarget$data = e.currentTarget.dataset,
                value = _e$currentTarget$data.value,
                groupindex = _e$currentTarget$data.groupindex,
                index = _e$currentTarget$data.index;

              this.triggerEvent('actiontap', { value: value, groupindex: groupindex, index: index });
            },
            closeActionSheet: function closeActionSheet(e) {
              var type = e.currentTarget.dataset.type;

              if (this.data.maskClosable || type) {
                this.setData({
                  show: false
                });
                this.triggerEvent('close');
              }
            }
          }
        });

      })
    ]);

actionsheet.json

{
  "component": true
}

actionsheet.wxml

<wxs module="utils">
    var join = function(a,b) {
        return a+b
    };
    var isNotSlot = function(v) {
        return typeof v !== 'string'
    }
    module.exports = {
        join: join,
        isNotSlot: isNotSlot
    }
</wxs>

<view wx:if="{{mask}}" class="weui-mask {{show ? '' : 'weui-mask_hidden'}} {{maskClass}}" bindtap="closeActionSheet"></view>
<view class="weui-actionsheet {{show ? 'weui-actionsheet_toggle' : ''}} {{extClass}}">
    <!-- 标题 -->
    <slot></slot>
</view>

actionsheet.wxss

.weui-mask {
  position: fixed;
  z-index: 1000;
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
}

.weui-mask_transparent {
  position: fixed;
  z-index: 1000;
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
}

.weui-actionsheet {
  position: fixed;
  left: 0;
  bottom: 0;
  transform: translate(0, 100%);
  backface-visibility: hidden;
  z-index: 5000;
  width: 100%;
  background-color: transparent;
  transition: transform 0.3s;
  overflow: hidden;
}

.weui-actionsheet__title {
  position: relative;
  height: 56px;
  padding: 0 24px;
  display: flex;
  justify-content: center;
  flex-direction: column;
  text-align: center;
  font-size: 12px;
  color: rgba(0, 0, 0, 0.5);
  line-height: 1.4;
  background: #fff;
}

.weui-actionsheet__title:before {
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1rpx solid rgba(0, 0, 0, 0.1);
  color: rgba(0, 0, 0, 0.1);
}

.weui-actionsheet__title .weui-actionsheet__title-text {
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.weui-actionsheet__menu {
  color: rgba(0, 0, 0, 0.9);
  background-color: #fff;
}

.weui-actionsheet__action {
  margin-top: 8px;
  background-color: #fff;
  padding-bottom: constant(safe-area-inset-bottom);
  padding-bottom: env(safe-area-inset-bottom);
}

.weui-actionsheet__cell {
  position: relative;
  padding: 16px;
  text-align: center;
  font-size: 17px;
  line-height: 1.41176471;
}

.weui-actionsheet__cell:before {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 1px;
  border-top: 1rpx solid rgba(0, 0, 0, 0.1);
  color: rgba(0, 0, 0, 0.1);
}

.weui-actionsheet__cell:active {
  background-color: #ececec;
}

.weui-actionsheet__cell:first-child:before {
  display: none;
}

.weui-actionsheet__cell_warn {
  color: #fa5151;
}

.weui-skin_android .weui-actionsheet {
  position: fixed;
  left: 50%;
  top: 50%;
  bottom: auto;
  transform: translate(-50%, -50%);
  width: 274px;
  box-sizing: border-box;
  backface-visibility: hidden;
  background: transparent;
  transition: transform 0.3s;
  border-radius: 2px;
}

.weui-skin_android .weui-actionsheet__action {
  display: none;
}

.weui-skin_android .weui-actionsheet__menu {
  border-radius: 2px;
  box-shadow: 0 6px 30px 0 rgba(0, 0, 0, 0.1);
}

.weui-skin_android .weui-actionsheet__cell {
  padding: 16px;
  font-size: 17px;
  line-height: 1.41176471;
  color: rgba(0, 0, 0, 0.9);
  text-align: left;
}

.weui-skin_android .weui-actionsheet__cell:first-child {
  border-top-left-radius: 2px;
  border-top-right-radius: 2px;
}

.weui-skin_android .weui-actionsheet__cell:last-child {
  border-bottom-left-radius: 2px;
  border-bottom-right-radius: 2px;
}

.weui-actionsheet_toggle {
  transform: translate(0, 0);
}

.weui-mask.weui-mask_hidden {
  opacity: 0;
  transform: scale3d(1, 1, 0);
}

.weui-mask {
  opacity: 1;
  transform: scale3d(1, 1, 1);
  transition: all 0.3s;
}

第二步：编写自己的页面

js文件：

Page({
  data: {
    showTypesheet: false,
  },
  openTypesheet: function () {
    this.setData({
      showTypesheet: true
    })
  },
  closeTypeSheet: function () {
    this.setData({
      showTypesheet: false
    })
  },

wxml文件：

<button class="btn1" style="width:100%" bindtap="openTypesheet">按下去获得新生</button>


<action-sheet bindactiontap="closeTypeSheet" show="{{showTypesheet}}" actions="{{groups}}">
  <button class="bom1" style="width:100vw" bindtap="typeF">FFF</button>
  <button class="bom1" style="width:100vw" bindtap="typeG">GGG</button>
  <button class="bom1" style="width:100vw" bindtap="typeB">BBB</button>
  <button class="bom1" style="width:100vw" bindtap="typeP">PPP</button>
  <view class="litter"></view>
  <button class="bom2" style="width:100vw" bindtap="noSub">取消</button>
</action-sheet>