解决微信小程序的wx-charts插件tab切换时的显示会出现位置移动问题-tab切换时，图表显示错乱-实现滑动tab

解决Echarts在微信小程序tab切换时的显示会出现位置移动问题

我的js

var dateTimePicker = require('../../utils/dateTimePicker.js');
var wxCharts = require('../../utils/wxcharts.js');
var util = require('../../utils/util.js');
var app = getApp();

Page({
  /**
   * 页面的初始数据
   */
  data: {
    selected: true,
    selected1: false,
    date: '',
    date1: '',
    startYear: 2008,
    endYear: 2222,
    // 日期数据
    datas: [],
    // 月数据
    attendDays: '',
    lateTimes: '',
    leaveEarlyTimes: '',
    unusualTimes: '',
    zao: '',
    chi: '',
    qifen: '',
    items: [{
      name: 'morning',
      value: '上午',
      checked: 'true'
    }, {
      name: 'moom',
      value: '下午'
    }, ]
  },

  zaodao: function() {
    var that = this;
    var time = that.data.date.substring(0, 10);
    wx.navigateTo({
      url: '../zaodao/zaodao?id=' + time,
    })
  },
  chidao: function() {
    var that = this;
    var ytime = that.data.date1.substring(0, 7);
    wx.navigateTo({
      url: '../chidao/chidao?id=' + ytime,
    })
  },
  qifen: function() {
    var that = this;
    var ytime = that.data.date1.substring(0, 7);
    wx.navigateTo({
      url: '../qifen/qifen?id=' + ytime,
    })
  },

  // 单选按钮
  radioChange: function(e) {
    var that = this;
    console.log("radio", e.detail.value);
    var time = that.data.date.substring(0, 10);
    if (e.detail.value == "morning") {
      // 发送用户请求
      wx.request({

        method: 'GET',
        header: {
          'Authorization': 'Bearer' + wx.getStorageSync('token')
        },
        success(res) {
          new wxCharts({
            canvasId: 'ringCanvas',
            type: 'ring',
            legend: false,
            extra: {
              ringWidth: 15, //圆环的宽度
              pie: {
                offsetAngle: -45 //圆环的角度
              }
            },
            series: [{
              data: res.data.data.normalNum,
            }, {
              data: res.data.data.beLateNum,
            }, {
              data: res.data.data.leaveNum,
            }, {
              data: res.data.data.uncheckedNum,
            }],
             320,
            height: 200,
            dataLabel: false
          });

          console.log("考勤上午按钮", res.data.data);
          that.setData({
            datas: res.data.data,
          })
          wx.showToast({
            title: '加载成功',
            icon: 'loading',
            duration: 500
          })
        }
      })
    } else {
      // 发送用户请求
      wx.request({

        method: 'GET',
        header: {
          'Authorization': 'Bearer' + wx.getStorageSync('token')
        },
        success(res) {
          new wxCharts({
            canvasId: 'ringCanvas',
            type: 'ring',
            legend: false,
            extra: {
              ringWidth: 15, //圆环的宽度
              pie: {
                offsetAngle: -45 //圆环的角度
              }
            },
            series: [{
              data: res.data.data.normalNum,
            }, {
              data: res.data.data.beLateNum,
            }, {
              data: res.data.data.leaveNum,
            }, {
              data: res.data.data.uncheckedNum,
            }],

             320,
            height: 200,
            dataLabel: false
          });

          console.log("考勤下午按钮", res.data.data);
          that.setData({
            datas: res.data.data,
          })
          wx.showToast({
            title: '加载成功',
            icon: 'loading',
            duration: 500
          })
        }
      })
    }
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function(options) {

    var that = this;
    console.log("kq,username", wx.getStorageSync("username"));
    // 获取当天时间
    var time = util.formatTime(new Date());
    that.setData({
      date: time,
      date1: time,
      username: wx.getStorageSync("username"),
    });


    // 获取完整的年月日 时分秒，以及默认显示的数组
    var obj = dateTimePicker.dateTimePicker(this.data.startYear, this.data.endYear);
    var obj1 = dateTimePicker.dateTimePicker(this.data.startYear, this.data.endYear);
    // 精确到分的处理，将数组的秒去掉
    var lastArray = obj1.dateTimeArray.pop();
    var lastTime = obj1.dateTime.pop();
  },

  // 改变日期
  changeDate(e) {
    // 全局
    var that = this;
    that.setData({
      date: e.detail.value
    });
    var date = e.detail.value;
    // 发送用户请求
    wx.request({

      method: 'GET',
      header: {
        'Authorization': 'Bearer' + wx.getStorageSync('token')
      },
      success(res) {
        new wxCharts({
          canvasId: 'ringCanvas',
          type: 'ring',
          legend: false,
          extra: {
            ringWidth: 15, //圆环的宽度
            pie: {
              offsetAngle: -45 //圆环的角度
            }
          },
          series: [{
            data: res.data.data.normalNum,
          }, {
            data: res.data.data.beLateNum,
          }, {
            data: res.data.data.leaveNum,
          }, {
            data: res.data.data.uncheckedNum,
          }],

           320,
          height: 200,
          dataLabel: false
        });

        console.log("选择日期数据", res.data.data);
        that.setData({
          datas: res.data.data,
        })
        wx.showToast({
          title: '加载成功',
          icon: 'loading',
          duration: 500
        })
      }
    })
  },

  // 改变月份
  changeDate1(e) {
    // 全局
    var that = this;
    that.setData({
      date1: e.detail.value, //数据源
    })
    var date1 = e.detail.value;
    // 发送用户请求
    wx.request({

      method: 'GET',
      header: {
        'Authorization': 'Bearer' + wx.getStorageSync('token')
      },
      success(res) {
        console.log("家长的月考勤", res.data)
        if (res.data.code == 1) {
          that.setData({
            attendDays: 0,
            lateTimes: 0,
            leaveEarlyTimes: 0,
            unusualTimes: 0,
          })
          wx.showModal({
            title: '提示',
            content: '当天没有数据',
            // showCancel: false,
            success: function(res) {
              if (res.confirm) {
                console.log('用户点击确定');
                wx.navigateBack({
                  delta: 1 //小程序关闭当前页面返回上一页面
                })
              } else if (res.cancel) {
                console.log('用户点击取消');
              }
            }
          })
        } else {
          that.setData({
            attendDays: res.data.data.attendDays,
            lateTimes: res.data.data.lateTimes,
            leaveEarlyTimes: res.data.data.leaveEarlyTimes,
            unusualTimes: res.data.data.unusualTimes,
          })
          wx.showToast({
            title: '加载成功',
            icon: 'loading',
            duration: 500
          })
        }
      }
    })

  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function() {
    var that = this;
    /**
     * 获取系统信息
     */
    // wx.getSystemInfo({
    //   success: function(res) {
    //     that.setData({
    //       winWidth: res.windowWidth,
    //       winHeight: res.windowHeight
    //     });
    //   }
    // });
  },

  /**
   * 滑动切换tab
   */
  bindChange: function(e) {
    var that = this;
    console.log("滑块", e.detail.current);
    that.setData({
      currentTab: e.detail.current
    });
  },
  /**
   * 点击tab切换
   */
  swichNav: function(e) {
    console.log("切换", this.data.currentTab);
    console.log("切换", e.target.dataset.current);
    var that = this;
    that.setData({
      currentTab: e.target.dataset.current
    });
    if (e.target.dataset.current == 0){
      console.log(e.target.dataset.current == 0)
      new wxCharts({
        canvasId: 'ringCanvas',
        type: 'ring',
        legend: false,
        extra: {
          ringWidth: 15, //圆环的宽度
          pie: {
            offsetAngle: -45 //圆环的角度
          }
        },
        // series: [{
        //   data: res.data.data.normalNum,
        // }, {
        //   data: res.data.data.beLateNum,
        // }, {
        //   data: res.data.data.leaveNum,
        // }, {
        //   data: res.data.data.uncheckedNum,
        // }],
        series: [{
          data: 10,
        }, {
          data: 50,
        }, {
          data: 30,
        }, {
          data: 40,
        }],
         320,
        height: 200,
        dataLabel: false
      });
    }
    // if (this.data.currentTab === e.target.dataset.current) {
    //   return false;
    // } else {
    //   console.log("点击切换", e.target.dataset.current)
    //   that.setData({
    //     currentTab: e.target.dataset.current
    //   })
    // }
  },
  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function() {
    var windowWidth = '', 
    windowHeight = '';    
    try {
      var res = wx.getSystemInfoSync();    
      windowWidth = res.windowWidth / 750 * 690;   
      windowHeight = res.windowWidth / 750 * 550    
    } catch (e) {
      console.error('getSystemInfoSync failed!');   
    }

    var that = this;
    console.log("家长的日考勤", that.data.date.substring(0, 10));
    let studentName = "无名氏"
    var time = that.data.date.substring(0, 10);
    // 家长的日考勤
    wx.request({

      method: 'GET',
      header: {
        'Authorization': 'Bearer' + wx.getStorageSync('token'),
      },
      success(res) {
        console.log("家长的日考勤", res.data);
        new wxCharts({
          canvasId: 'ringCanvas',
          type: 'ring',
          legend: false,
          extra: {
            ringWidth: 15, //圆环的宽度
            pie: {
              offsetAngle: -45 //圆环的角度
            }
          },
          // series: [{
          //   data: res.data.data.normalNum,
          // }, {
          //   data: res.data.data.beLateNum,
          // }, {
          //   data: res.data.data.leaveNum,
          // }, {
          //   data: res.data.data.uncheckedNum,
          // }],
          series: [{
            data: 10,
          }, {
            data: 50,
          }, {
            data: 30,
          }, {
            data: 40,
          }],
           320,
          height: 200,
          //  windowWidth,
          // height: windowHeight,
          dataLabel: false
        });
        that.setData({
          datas: res.data.data,
        })
        wx.showToast({
          title: '加载成功',
          icon: 'loading',
          duration: 500
        })
      }
    })
    // 家长的月考勤
    console.log("家长的月考勤", that.data.date1.substring(0, 7));
    var ytime = that.data.date1.substring(0, 7);
    wx.request({

      method: 'GET',
      header: {
        'Authorization': 'Bearer' + wx.getStorageSync('token')
      },
      success(res) {
        console.log("家长的月考勤", res.data)
        if (res.data.code == 1) {
          that.setData({
            attendDays: 0,
            lateTimes: 0,
            leaveEarlyTimes: 0,
            unusualTimes: 0,
          })
        } else {
          that.setData({
            attendDays: res.data.data.attendDays,
            lateTimes: res.data.data.lateTimes,
            leaveEarlyTimes: res.data.data.leaveEarlyTimes,
            unusualTimes: res.data.data.unusualTimes,
          })
        }
      }
    })
    // 请求榜单
    wx.request({

      method: 'GET',
      header: {
        'Authorization': 'Bearer' + wx.getStorageSync("token"),
      },
      success: function(res) {
        console.log("考勤首页榜单早到", res.data);
        if (res.data.data != null) {
          that.setData({
            zao: res.data.data[0].studentName,
          })
        } else {
          that.setData({
            zao: studentName,
          })
        }
      }
    })
    // 迟到
    wx.request({

      method: 'GET',
      header: {
        Authorization: 'Bearer' + wx.getStorageSync("token"),
      },
      success: function(res) {
        console.log("考勤首页榜单迟到", res.data);
        if (res.data.data != null) {
          that.setData({
            chi: res.data.data[0].studentName,
          })
        } else {
          that.setData({
            chi: studentName,
          })
        }
      }
    })
    // 勤奋榜
    wx.request({

      method: 'GET',
      header: {
        Authorization: 'Bearer' + wx.getStorageSync("token"),
      },
      success: function(res) {
        console.log("考勤首页榜单勤奋", res.data);
        if (res.data.data != null) {
          that.setData({
            qifen: res.data.data[0].studentName,
          })
        } else {
          that.setData({
            qifen: studentName,
          })
        }
      }
    })
  },
  selected: function (e) {
    this.setData({
      selected1: false,
      selected: true
    })
  },

  selected1: function (e) {
    this.setData({
      selected: false,
      selected1: true
    })
  },
  /**
   * 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() {

  }
})

<!-- <view class="swiper-tab">
  <view class="swiper-tab-list {{currentTab==0 ? 'on' : ''}}" data-current="0" bindtap="swichNav">日统计</view>
  <view class="swiper-tab-list {{currentTab==1 ? 'on' : ''}}" data-current="1" bindtap="swichNav">月统计</view>
</view> -->
<view class="head">
  <view class="head_item {{selected?'head_itemActive':''}}" bindtap="selected">日考勤</view>
  <view class="ring"></view>
  <view class="head_item {{selected1?'head_itemActive':''}}" bindtap='selected1'>月考勤</view>
</view>
<!-- 下方style="height:{{winHeight - 31}}px" -->
<!-- <swiper current="{{currentTab}}" class="swiper-box" duration="300" style="height:500px" bindchange="bindChange"> -->
  <!-- <swiper-item> -->
  <view class="main {{selected?'show':'hidden'}}">
    <view class='hr'></view>
    <view class='bgone'>
      <view class='zz'>
        <view class='time'>
          <picker mode="date" value="{{date}}" start="2018-01-01" end="2222-10-08" bindchange="changeDate">
            <view>
              {{util.sub(date)}} ∨
            </view>
          </picker>
        </view>
        <radio-group class="radio-group" bindchange="radioChange">
          <label class="radio" wx:for="{{items}}">
            <radio value="{{item.name}}" checked="{{item.checked}}" /> {{item.value}}
          </label>
        </radio-group>
        <view class='name'>{{datas.studentName}}</view>
        <view class='class'>{{datas.gradeName}} {{datas.className}}</view>
      </view>

      <view class='kuang'>
        <view class='ming'>
          <view class='aa'>{{datas.ranking}}</view>
          <view class='mm'>名</view>
        </view>
        <view class='ban'>班级早到榜</view>
      </view>

      <!-- hidden="{{currentTab == 1}}" -->
      <view>
        <canvas class="canvas" canvas-id="ringCanvas" hidden="{{currentTab == 1}}"></canvas>
      </view>


      <view class='itemyy'>
        <view class='ra'>
          <view class='shuzi'>{{datas.normalNum}}</view>
          <view class='zi'>准时</view>
        </view>
        <view class='ra'>
          <view class='shuzi'>{{datas.beLateNum}}</view>
          <view class='zi'>迟到</view>
        </view>
        <view class='ra'>
          <view class='shuzi'>{{datas.leaveNum}}</view>
          <view class='zi'>请假</view>
        </view>
      </view>
    </view>
    <view class='hr'></view>
    <view class='bottom'>
      <view class='jb'>
        <image src='/images/List.png' style=' 50rpx; height: 50rpx;'></image>
      </view>
      <view class='pic'>
        <view class='r' bindtap='zaodao'>
          <view class='bei'>
            <view class='text'>{{zao}}</view>
          </view>
          <view class='zi'>早到榜</view>
        </view>
        <view class='r' bindtap='chidao'>
          <view class='bei'>
            <view class='text'>{{chi}}</view>
          </view>
          <view class='zi'>迟到榜</view>
        </view>
        <view class='r' bindtap='qifen'>
          <view class='bei'>
            <view class='text'>{{qifen}}</view>
          </view>
          <view class='zi'>勤奋榜</view>
        </view>
      </view>
    </view>
  <!-- </swiper-item> -->
  </view>
  <!-- <swiper-item> -->
  <view class="main {{selected1?'show':'hidden'}}">
    <view class='date'>
      <picker mode="date" value="{{date1}}" start="2018-01-01" end="2222-10-08" bindchange="changeDate1" fields="month">
        <view>
          ＜{{util.sub1(date1)}}＞ 统计
        </view>
      </picker>
    </view>
    <!-- 次数 -->
    <view class='bg'>
      <view class="item">
        <view class="title">出勤天数</view>
        <view class="detail2">
          <text>{{attendDays}}天 ∨</text>
        </view>
      </view>
    </view>
    <view class='bg'>
      <view class="iteming">
        <view class="title">请假次数</view>
        <view class="detail2">
          <text>{{lateTimes}}次 ∨</text>
        </view>
      </view>
    </view>
    <view class='bg'>
      <view class="item">
        <view class="title">迟到次数</view>
        <view class="detail2">
          <text>{{leaveEarlyTimes}}次 ∨</text>
        </view>
      </view>
    </view>
    <view class='bg'>
      <view class="iteming">
        <view class="title">缺少打卡</view>
        <view class="detail2">
          <text>{{unusualTimes}}次 ∨</text>
        </view>
      </view>
    </view>
  <!-- </swiper-item>
</swiper> -->
</view>
<wxs module="util">
  var sub = function(val) {
    return val.substring(0, 10)
  }
  var sub1 = function(val) {
    return val.substring(0, 7)
  }
  module.exports.sub1 = sub1;
  module.exports.sub = sub;
</wxs>

tab切换时，图表显示错乱

<canvas class="kcanvas" canvas-id="ringCanvas" hidden="{{currentTab == 1}}"></canvas>

<view hidden="{{currentTab !== 1}}" id="one" class="currentPage">
 <view class="containerSales" wx: if="{{currentTab === 1}}">
 <ec-canvas id="mychart-dom-bar" canvas-id="mychart-bar" ec="{{ecSales}}"></ec-canvas>
 </view>
</view>

ring chart

new wxCharts({
 canvasId: 'ringCanvas',
 type: 'ring',
 series: [{
  name: '成交量1',
  data: 15,
 }, {
  name: '成交量2',
  data: 35,
 }, {
  name: '成交量3',
  data: 78,
 }, {
  name: '成交量4',
  data: 63,
 }],
  320,
 height: 200,
 dataLabel: false
});

js当中使用require引入即可：

let Charts = require('./../../utils/wxcharts.js');

一般以iPhone6为标准进行设计

/* 例如设计图尺寸为320 x 300 */
.canvas {
     640px;
    height: 600px;
    transform: scale(0.5)
}

new Charts({
      animation: true,
      canvasId: 'canvas5',
      type: 'ring',
      extra: {
        ringWidth: 10,//圆环的宽度
        pie: {
          offsetAngle: -45//圆环的角度
        }
      },
      title: {
        name: '70%',
        color: '#7cb5ec',
        fontSize: 25
      },
      subtitle: {
        name: '收益率',
        color: '#666666',
        fontSize: 15
      },
      series: [{
        name: '成交量1',
        data: 15,
        stroke: false
      }, {
        name: '成交量2',
        data: 35,
        stroke: false
      }, {
        name: '成交量3',
        data: 78,
        stroke: false
      }, {
        name: '成交量4',
        data: 63,
        stroke: false
      }],
      disablePieStroke: true,
       640,
      height: 200,
      dataLabel: true,
      legend: false,
      padding: 0
    });

/* 环形 */

.canvas {
  z-index: 1;
  position: absolute;
  left: 32px;
  top: 60px;
  height: 350rpx;
}

new wxCharts({
          canvasId: 'ringCanvas',
          type: 'ring',
          legend: false,
          extra: {
            ringWidth: 15, //圆环的宽度
            pie: {
              offsetAngle: -45 //圆环的角度
            }
          },
          series: [{
            data: res.data.data.normalNum,
          }, {
            data: res.data.data.beLateNum,
          }, {
            data: res.data.data.leaveNum,
          }, {
            data: res.data.data.uncheckedNum,
          }],
           320,
          height: 200,
          dataLabel: false
        });

switchNav: function(event) {
    var cur = event.currentTarget.dataset.current;
    if (this.data.currentTab == cur) { return false; }
    else {
      this.setData({
        currentTab: cur
      })
    }
 
    if(cur==1){
      this.setData({
        init_datas: nz_data,
        currentTab1: 1
      })
      var tmp_datas = this.data.init_datas;
      console.dir(tmp_datas);
      this.setData({
        nz_datas: tmp_datas,
        class:1
      })
    }
    if(cur==2){
      this.setData({
        init_datas1: man_data,
        currentTab1: 1
      })
      var tmp_datas = this.data.init_datas1;
      console.dir(tmp_datas);
      this.setData({
        nz_datas: tmp_datas,
        class:2
      })
    }
  },
 
  switchNav1: function (event) {
    var cur = event.currentTarget.dataset.curr;
    console.log("switchNav1_curr="+cur);
    console.log("class=" + this.data.class);
    if (this.data.currentTab1 == cur) { return false; }
    else {
      this.setData({
        currentTab1: cur
      })
    }
 
    if(cur==1){
      if(this.data.class==1){
        var tmp_datas = this.data.init_datas;
        this.setData({
          nz_datas: tmp_datas
        })
      }
      if (this.data.class == 2) {
        var tmp_datas = this.data.init_datas1;
        this.setData({
          nz_datas: tmp_datas
        })
      }
    }

实现滑动tab

<view>
  <view class="swiper-tab">
    <view class="swiper-tab-list {{tab==0 ? 'on' : ''}}" data-current="0" bindtap="tab_click">图文</view>
    <view class="swiper-tab-list {{tab==1 ? 'on' : ''}}" data-current="1" bindtap="tab_click">产品</view>
  </view>
  <swiper current="{{tab}}" class="swiper-box" duration="300" style="height:{{winHeight - 31}}px" bindchange="tab_slide">
    <swiper-item>
      图文
    </swiper-item>
 
    <swiper-item>
      产品
    </swiper-item>
  </swiper>
</view>

Page({
  data: {
    tab: 0
  },
  tab_slide: function (e) {//滑动切换tab 
    var that = this;
    that.setData({ tab: e.detail.current });
  },
  tab_click: function (e) {//点击tab切换
    var that = this;
    if (that.data.tab === e.target.dataset.current) {
      return false;
    } else {
      that.setData({
        tab: e.target.dataset.current
      })
    }
  },
})