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微信小程序单选框组件(微信小程序picker多列选择器mode = multiSelector)

更多 时间:2021-10-14 00:13:30 类别:编程学习 浏览量:1551

微信小程序单选框组件

微信小程序picker多列选择器mode = multiSelector

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一、效果图(多列)

微信小程序单选框组件(微信小程序picker多列选择器mode = multiSelector)

二、普通选择器:mode = selector、多列选择器:mode = multiSelector

文档地址:微信开发文档 picker选择器

  • 普通选择器:mode = selector,一维数组:array: ['美国', '中国', '巴西', '日本']
  • 多列选择器:mode = multiSelector,二维数组:multiArray: [['无脊柱动物', '脊柱动物'], ['扁性动物', '线形动物', '环节动物', '软体动物', '节肢动物'], ['猪肉绦虫', '吸血虫']]

格式不对,要处理成对应数组格式,占坑图:

微信小程序单选框组件(微信小程序picker多列选择器mode = multiSelector)

三、app.json
  • {
      "pages": [
        "pages/index/index",
        "pages/logs/logs",
        "pages/picker/picker"
      ],
      "entryPagePath": "pages/picker/picker",
      "window": {
        "backgroundTextStyle": "light",
        "navigationBarBackgroundColor": "#fff",
        "navigationBarTitleText": "Weixin",
        "navigationBarTextStyle": "black"
      },
      "sitemapLocation": "sitemap.json",
      "usingComponents": {
        "van-button": "@vant/weapp/button/index",
        "van-area": "@vant/weapp/area/index"
      }
    }
    
    
  • 四、picker.wxml
  • <!--pages/picker/picker.wxml-->
    <view>
      <view class="section__title">多列选择器</view>
      <picker mode="multiSelector" bindchange="bindMultiPickerChange" bindcolumnchange="bindMultiPickerColumnChange"
        value="{{multiIndex}}" range="{{newArr}}">
        <view class="picker">
          当前选择: <van-button type="primary">
            {{newArr[0][multiIndex[0]]}},{{newArr[1][multiIndex[1]]}},{{newArr[2][multiIndex[2]]}}</van-button>
        </view>
      </picker>
    </view>
    
    
  • 五、picker.js

    多列选择器:mode = multiSelector

    注意看数组格式:multiArray数组children,要处理二维数组:

  • // pages/picker/picker.js
    Page({
      /**
       * 页面的初始数据
       */
      data: {
        multiArray: [{
            id: 1,
            label: "东南",
            children: [{
                id: 2,
                label: "上海",
                children: [{
                    id: 3,
                    label: "普陀",
                  },
                  {
                    id: 4,
                    label: "黄埔",
                  },
                  {
                    id: 5,
                    label: "徐汇",
                  },
                ],
              },
              {
                id: 7,
                label: "江苏",
                children: [{
                    id: 8,
                    label: "南京",
                  },
                  {
                    id: 9,
                    label: "苏州",
                  },
                  {
                    id: 10,
                    label: "无锡",
                  },
                ],
              },
              {
                id: 12,
                label: "浙江",
                children: [{
                    id: 13,
                    label: "杭州",
                  },
                  {
                    id: 14,
                    label: "宁波",
                  },
                  {
                    id: 15,
                    label: "嘉兴",
                  },
                ],
              },
            ],
          },
          {
            id: 17,
            label: "西北",
            children: [{
                id: 18,
                label: "陕西",
                children: [{
                    id: 19,
                    label: "西安",
                  },
                  {
                    id: 20,
                    label: "延安",
                  },
                ],
              },
              {
                id: 21,
                label: "新疆维吾尔族自治区",
                children: [{
                    id: 22,
                    label: "乌鲁木齐",
                  },
                  {
                    id: 23,
                    label: "克拉玛依",
                  },
                ],
              },
            ],
          },
        ],
        multiIndex: [0, 0, 0],
        multiIds: [],
        newArr: [],
      },
    
      bindMultiPickerChange(e) {
        console.log(this.data.multiIds);
      },
      bindMultiPickerColumnChange(e) {
        let data = {
          newArr: this.data.newArr,
          multiIndex: this.data.multiIndex,
          multiIds: this.data.multiIds,
        };
        data.multiIndex[e.detail.column] = e.detail.value;
    
        let searchColumn = () => {
          let arr1 = [];
          let arr2 = [];
          this.data.multiArray.map((v, vk) => {
            if (data.multiIndex[0] === vk) {
              data.multiIds[0] = {
                ...v,
              };
              v.children.map((c, ck) => {
                arr1.push(c.label);
                if (data.multiIndex[1] === ck) {
                  data.multiIds[1] = {
                    ...c,
                  };
                  c.children.map((t, vt) => {
                    arr2.push(t.label);
                    if (data.multiIndex[2] === vt) {
                      data.multiIds[2] = {
                        ...t,
                      };
                    }
                  });
                }
              });
            }
          });
          data.newArr[1] = arr1;
          data.newArr[2] = arr2;
        };
        switch (e.detail.column) {
          case 0:
            // 每次切换还原初始值
            data.multiIndex[1] = 0;
            data.multiIndex[2] = 0;
            // 执行函数处理
            searchColumn();
            break;
          case 1:
            data.multiIndex[2] = 0;
            searchColumn();
            break;
        }
        this.setData(data);
      },
    
      /**
       * 生命周期函数--监听页面加载
       */
      onLoad: function (options) {
        let state = {
          arr: [],
          arr1: [],
          arr2: [],
          arr3: [],
          multiIds: []
        }
        this.data.multiArray.map((v, vk) => {
          state.arr1.push(v.label);
          if (this.data.multiIndex[0] === vk) {
            state.multiIds[0] = v;
          }
          if (state.arr2.length <= 0) {
            v.children.map((c, ck) => {
              state.arr2.push(c.label);
              if (this.data.multiIndex[1] === ck) {
                state.multiIds[1] = c;
              }
              if (state.arr3.length <= 0) {
                c.children.map((t, tk) => {
                  state.arr3.push(t.label);
                  if (this.data.multiIndex[2] === tk) {
                    state.multiIds[2] = t;
                  }
                });
              }
            });
          }
        });
        state.arr[0] = state.arr1;
        state.arr[1] = state.arr2;
        state.arr[2] = state.arr3;
        this.setData({
          newArr: state.arr,
          multiIds: state.multiIds,
        });
      },
    
      /**
       * 生命周期函数--监听页面初次渲染完成
       */
      onReady: function () {},
    
      /**
       * 生命周期函数--监听页面显示
       */
      onShow: function () {},
    
      /**
       * 生命周期函数--监听页面隐藏
       */
      onHide: function () {},
    
      /**
       * 生命周期函数--监听页面卸载
       */
      onUnload: function () {},
    
      /**
       * 页面相关事件处理函数--监听用户下拉动作
       */
      onPullDownRefresh: function () {},
    
      /**
       * 页面上拉触底事件的处理函数
       */
      onReachBottom: function () {},
    
      /**
       * 用户点击右上角分享
       */
      onShareAppMessage: function () {},
    });
    
    
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