微信小程序案例-03翻页时钟-3

微信小程序实战系列

• 《微信小程序实战-01翻页时钟-1》
• 《微信小程序实战-02翻页时钟-2》

前言

本文继续完成最后一个部分“动态翻页效果”。

动态翻页效果实现

clock.wxml

<view class="container">
<view class="clock-container">
  <view class="flip-container">
    <block wx:for="{{timeArr}}" wx:for-item="unit" wx:for-index="unitIndex" wx:key="unitIndex">
      <view class="flip-items">
        <block wx:for="{{unit.max+1}}" wx:for-item="item" wx:for-index="index" wx:key="index">
          <view class="{{['item',(unit.current==index)?'current':'',(unit.current-1==index||index==unit.max&&unit.current==0)?'past':'']}}">
            <view class="up">
              <view class="inner">{{index}}view>
              <view class="shadow">view>
            view>
            <view class="down">
              <view class="inner">{{index}}view>
              <view class="shadow">view>
            view>
          view>
        block>
      view>
    block>
  view>
view>
view>

clock.wxss

.flip-container {
  display: flex;
  justify-content: center;
  position: relative;
  padding: 0 20rpx;
}


.flip-items {
  position: relative;
  width: 90rpx;
  height: 145rpx;
  font-size: 128rpx;
  font-weight: bold;
  border-radius: 10rpx;
  border: 1rpx solid rgba(121, 121, 121, 0.384);
  box-shadow: 0 2rpx 18rpx rgba(0, 0, 0, 0.7);
}

.flip-container .flip-items:nth-of-type(2n+1) {
  margin-right: 12rpx;
}

.flip-container .flip-items:nth-of-type(2),
.flip-container .flip-items:nth-of-type(4) {
  margin-right: 36rpx;
}

.flip-container .flip-items:nth-of-type(2)::after,
.flip-container .flip-items:nth-of-type(4)::after,
.flip-container .flip-items:nth-of-type(2)::before,
.flip-container .flip-items:nth-of-type(4)::before {
  position: absolute;
  right: -18rpx;
  content: '';
  transform: translateX(50%);
  width: 25rpx;
  height: 25rpx;
  border-radius: 50%;
  box-shadow: rgba(0, 0, 0, 0.7) 1px 1px 5px;
  background-color: rgba(0, 0, 0, 0.801);
}

.flip-container .flip-items:nth-of-type(2)::before,
.flip-container .flip-items:nth-of-type(4)::before {
  top: 25%;
}

.flip-container .flip-items:nth-of-type(2)::after,
.flip-container .flip-items:nth-of-type(4)::after {
  bottom: 25%;
}


.item {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

.item::before {
  position: absolute;
  content: '';
  top: 75rpx;
  width: 100%;
  height: 5rpx;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 9;
}

.flip-container .flip-items .item .up,
.flip-container .flip-items .item .down {
  position: absolute;
  left: 0;
  right: 0;
  height: 50%;
  overflow: hidden;
}

/* 设置transform的原点 */
.up {
  transform-origin: 50% 100%;
  top: 0;
}

/* 设置transform的原点 */
.flip-container .flip-items .item .down {
  transform-origin: 50% 0%;
  bottom: 0;
}

.flip-container .flip-items .item .inner {
  position: absolute;
  width: 100%;
  height: 145rpx;
  color: #252525;
  left: 0;
  line-height: 145rpx;
  text-align: center;
  text-shadow: 0 2rpx 4rpx rgb(0, 0, 0);
  border-radius: 10rpx;
  background-color: #55e3e3;
}

.flip-container .flip-items .item .up .inner {
  top: 0;
}

.flip-container .flip-items .item .down .inner {
  bottom: 0;
}

.flip-container .flip-items .item .up .shadow {
  border-top-left-radius: 10rpx;
  border-top-right-radius: 10rpx;
}

.flip-container .flip-items .item .down .shadow {
  border-bottom-left-radius: 10rpx;
  border-bottom-right-radius: 10rpx;
}

.flip-container .flip-items .item.past {
  z-index: 3;
}

/*  current time keep top z-index:4 */
.flip-container .flip-items .item.current {
  animation: highter-level 0.5s 0.5s linear forwards;
  z-index: 2;
}

/* 前一秒的上半页,旋转 0～-90deg */
.flip-container .flip-items .item.past .up {
  animation: flip-past-up 0.5s linear both;
}

/* 当前秒的下半页,旋转90～0 */
.flip-container .flip-items .item.current .down {
  animation: flip-current-down 0.5s 0.5s linear both;
}

@keyframes flip-current-down {
  from {
    transform: rotateX(90deg);
  }

  to {
    transform: rotateX(0deg);
  }
}
@keyframes flip-past-up {
  from {
    transform: rotateX(0deg);
  }

  to {
    transform: rotateX(-90deg);
  }
}

@keyframes highter-level {
  from {
    z-index: 4;
  }

  to {
    z-index: 4;
  }
}

.flip-container .flip-items .item .shadow {
  position: absolute;
  width: 100%;
  height: 100%;
}

/* show 渐变 */
.flip-container .flip-items .item.past .up .shadow {
  background: linear-gradient(rgba(0, 0, 0, 0.1) 0%, #000 100%);
  animation: show 0.5s linear both;
}

/* show 渐变 */
.flip-container .flip-items .item.past .down .shadow {
  background: linear-gradient(#000 0%, rgba(0, 0, 0, 0.1) 100%);
  animation: show 0.5s linear both;
}

/* hide 渐变 */
 .flip-container .flip-items .item.current .up .shadow {
  background: linear-gradient(rgba(0, 0, 0, 0.1) 0%, #000 100%);
  animation: hide 0.5s 0.3s linear both;
}

.flip-container .flip-items .item.current .down .shadow {
  background: linear-gradient(#000 0%, rgba(0, 0, 0, 0.1) 100%);
  animation: hide 0.5s 0.3s linear both;
}

@keyframes show {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes hide {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}

clock.js

Page({
  data: {

  },

  onLoad: function () {
   this.setTimeRunner()
  },

  setTimeRunner: function () {
    this.timeRunner = setInterval(() => {
      this.getTimeStr();
      this.getTimeArr();
    }, 1000);
  },

   getTimeStr: function () {
    let that = this;
    var time = new Date();
    var hour = ('0' + time.getHours()).slice(-2);
    var minute = ('0' + time.getMinutes()).slice(-2);
    var second = ('0' + time.getSeconds()).slice(-2);
    var timeStr = (hour + minute + second).split('');
    that.setData({timeStr:timeStr})
  },

    getTimeArr: function () {
      var timeArr = this.data.timeStr.map(function (element, index) {
        var max;
        if (index & 1 == 1) { 
          max = 9;
        } else if (index == 0) { 
          max = 2;
        } else if (index == 2) { 
          max = 5;
        } else if (index == 4) { 
          max = 5;
        }
        var current = Number(element)
        return {
          max: max,
          current: current
        };
      })
      this.setData({timeArr:timeArr})
    },

    beforeDestroy:function () {
      clearInterval(this.timeRunner);
    },
  onUnload: function () {
    this.beforeDestroy()
  }
})

运行效果

点击翻页时钟运行效果

总结

本项目的综合性较强，对wxss、wxml、js的综合运用需要较为熟悉，是一个非常好的练手小项目。