微信小程序实现左侧滑栏过程解析

<!--index.wxml--><view><!-- 侧边滑动菜单 --> <view class="page-slidebar">  <view class="page-content">   <view class="userinfo">    <button wx:if="{{!hasUserInfo && canIUse}}" open-type="getUserInfo" bindgetuserinfo="getUserInfo"> 点击获取头像昵称 </button>    <block wx:else>     <image bindtap="bindViewTap" class="userinfo-avatar" src="{{userInfo.avatarUrl}}" mode="cover"></image>     <text class="userinfo-nickname">{{userInfo.nickName}}</text>    </block>   </view>   <view class="account-info">    <view class="account-info-item">用户：{{YHMC}}</view>    <view class="account-info-item">账号：{{YHZH}}</view>    <view class="account-info-item">角色：{{YHJS}}</view>    <view class="account-info-item">版本：{{version}}</view>   </view>   <view>    <view class='quit-view'>     <button class='quit-btn' bindtap='quit'>退出登录</button>    </view>   </view>  </view> </view><!-- 主页内容 --> <view bindtouchmove="tap_drag" bindtouchend="tap_end" bindtouchstart="tap_start" class="page-top {{open ? ['c-state','cover'] : ''}} ">  <view class="usermotto">   <text class="user-motto">{{motto}}</text>  </view> </view> <!-- 添加侧拉悬浮按钮 --> <view bindtap="openSlider">  <image class="floatbutton {{open ? 'c-button-open' : '' }}" src="../../img/floatbutton.png"></image> </view></view>

/**index.wxss**/.userinfo { display: flex; flex-direction: column; align-items: center;}.userinfo-avatar { width: 128rpx; height: 128rpx; margin: 20rpx; border-radius: 50%;}.userinfo-nickname { color: #aaa;}.account-info {  margin-top: 50rpx;}.account-info-item { display: flex; align-items: center; height: 54px; margin-left: 10rpx; border-bottom: 1px solid #eee;}/* 侧边栏样式 */.page-slidebar {  height: 100%;  width: 65%;  position: fixed;  background-color:white;  z-index: 0;} /* 主页样式 */.page-top {  height: 100%;  position: fixed;  width: 100%;  background-color:white;  z-index: 0;  transition: All 0.4s ease;  -webkit-transition: All 0.4s ease;}/* 控制侧边栏的内容距离顶部的距离 */.page-content {  padding-top: 60rpx;}/* 当屏幕向左滑动，出现侧边栏的时候，主页的动画样式 *//* scale：取值范围 0~1 ，表示屏幕大小是原来的百分之几，可以自己修改成 0.8 试下*//* translate(60%,0%) 表示向左滑动的时候，侧边栏占用平时的宽度为 60%  */.c-state {  transform: rotate(0deg) scale(1) translate(65%, 0%);  -webkit-transform: rotate(0deg) scale(1) translate(65%, 0%);}.floatbutton { position: fixed; width: 100rpx; height: 100rpx; bottom: 140rpx; left: 40rpx; z-index: 9999;}.c-button-open { transform: rotate(180deg) scale(1) translate(65%, 0%); -webkit-transform: rotate(180deg) scale(1) translate(65%, 0%); transition-duration:0.5s; -webkit-transition-duration: 0.5s; left: 60%;}/* 遮盖层样式 */.cover{  width: 100%;  height: 100%;  background-color:gray;  opacity: 0.5;  z-index: 9000;}.quit-view { height: 5%; width: 65%;}.quit-btn { position: fixed; bottom: 5rpx; z-index: 999; color: #fff; width: 65%; border-radius: 5rpx; background-color: #064acb;}

// 点击左下角小图标事件 openSlider: function (e) {  if (this.data.open) {   this.setData({    open: false   });  } else {   this.setData({    open: true   });  } }, tap_start: function (e) {  // touchstart事件  // 把手指触摸屏幕的那一个点的 x 轴坐标赋值给 mark 和 newmark  this.data.mark = this.data.newmark = e.touches[0].pageX; }, tap_drag: function (e) {  // touchmove事件  this.data.newmark = e.touches[0].pageX;  // 手指从左向右移动  if (this.data.mark < this.data.newmark) {   this.istoright = true;  }  // 手指从右向左移动  if (this.data.mark > this.data.newmark) {   this.istoright = false;  }  this.data.mark = this.data.newmark; }, tap_end: function (e) {  // touchend事件  this.data.mark = 0;  this.data.newmark = 0;  // 通过改变 opne 的值，让主页加上滑动的样式  if (this.istoright) {   this.setData({    open: true   });  } else {   this.setData({    open: false   });  } }