<template>
			  <div id="app">
			    <div
			      ref="customerService"
			      class="customer-service"
			      @touchstart="touchstartHandle('customerService', $event)"
			      @touchmove="touchmoveHandle('customerService', $event)"
			    >
			      <span class="iconfont">&#xe6f6;</span>
			    </div>
			    <router-view />
			  </div>
			</template>
			<script>
			export default {
			  name: "",
			  components: {},
			  props: [],
			  data() {
			    return {
			      touch: {
			        initialPosition: {},
			        movePostion: {},
			      },
			      element: {
			        initialPosition: {},
			        movePostion: {},
			      },
			    };
			  },
			  computed: {},
			  watch: {},
			  created() {},
			  mounted() {},
			  methods: {
			    touchstartHandle(refName, e) {
			      // console.log(e)
			      // 触摸开始
			      let touchTarget = e.targetTouches[0];
			      // 记录触摸点的坐标（初始位置）
			      this.touch.initialPosition = {
			        x: touchTarget.clientX,
			        y: touchTarget.clientY,
			      };
			      // 记录需要移动的元素坐标（初始位置）
			      this.element.initialPosition = {
			        x: this.$refs[refName].offsetLeft,
			        y: this.$refs[refName].offsetTop,
			      };
			    },
			    touchmoveHandle(refName, e) {
			      e.preventDefault();
			      let touchTarget = e.targetTouches[0];
			      // 根据初始touch位置计算移动距离:元素移动位置=元素初始位置+(光标移动后的位置-光标点击时的初始位置)
			      let X =
			        this.element.initialPosition.x +
			        (touchTarget.clientX - this.touch.initialPosition.x);
			      let Y =
			        this.element.initialPosition.y +
			        (touchTarget.clientY - this.touch.initialPosition.y);
			      // 限制可移动距离，不超出可视区域
			      let maxWidth = innerWidth - this.$refs[refName].offsetWidth;
			      let maxHeight = innerHeight - this.$refs[refName].offsetHeight;
			      X = X <= 0 ? 0 : X >= maxWidth ? maxWidth : X;
			      Y = Y <= 0 ? 0 : Y >= maxHeight ? maxHeight : Y;
			      // console.log(X,Y)
			
			      // 移动元素
			      this.$refs[refName].style.left = X + "px";
			      this.$refs[refName].style.top = Y + "px";
			    },
			  },
			};
			</script>
			<style lang="scss">
			@import "./assets/icon/iconfont.css";
			* {
			  margin: 0;
			  padding: 0;
			  list-style: none;
			  box-sizing: border-box;
			}
			html,
			body {
			  width: 100%;
			  height: 100%;
			}
			#nav {
			  padding: 0;
			  margin: 0;
			}
			#app {
			  position: relative;
			}
			.customer-service {
			  position:fixed;
			  height: 60px;
			  width: 60px;
			  border-radius: 50%;
			  z-index: 999;
			  color: #fff;
			  font-size: 24px;
			  background: rgb(0, 122, 255);
			  text-align: center;
			  line-height: 60px;
			}
			</style>