Vue简单练习 桌面时钟的实现代码实例_稚终_前端开发者

vue实现一个简单的网页桌面时钟,主要包括时钟显示、计时、暂停、重置等几个功能。

效果图如下,页面刚进来的时候是一个时钟,时钟上显示的时、分、秒为当前实际时间,点击计时器按钮后,页面变成一个计时器,并且计时器按钮被暂停与重置两个按钮替代,分别对计时器进行暂停和重置,若点击时钟按钮会切换回时钟界面。

代码如下:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>时钟</title>
  <style type="text/css">
    .clock {
      width: 400px;
      height: 180px;
      line-height: 180px;
      border: 10px solid #aaa;
      border-radius: 10px;
      margin: 120px auto;
      background: pink;
      text-align: center;
      position: relative;
      box-shadow: 0px 5px 20px rgba(0,0,0,.6);
    }
    .clock .text {
      font-size: 70px;
      font-weight: bold;
      color: rgba(0,0,0,.7);
    }
    .clock .btn {
      position: absolute;
      /*top: -66px;*/
      bottom: -66px;
      border: none;
      outline: none;
      width: 80px;
      height: 36px;
      border-radius: 4px;
      font-size: 16px;
      background: #aaa;
      cursor: pointer;
      box-shadow: 0px 5px 20px rgba(0,0,0,.6);
    }
    .clock .btn:hover {
      opacity: 0.8;
    }
    .clock .btn-clock {
      left: 110px;
    }
    .clock .btn-clock.to-left {
      left: 60px;
    }
    .clock .btn-timer {
      right: 110px;
    }
    .clock .btn-suspend {
      right: 160px;
    }
    .clock .btn-reset {
      right: 60px;
    }
  </style>
  <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
  <div id="app">
    <div class="clock">
      <span class="text" v-if="index == 0">
        {{ hour }}:{{ min }}:{{ sec }}
      </span>
      <span class="text" v-else>
        {{ min }}:{{ sec }}:{{ msec }}
      </span>
      <button class="btn btn-clock" @click="selectClock" :class="{'to-left': index != 0}">时钟</button>
      <button class="btn btn-timer" @click="selectTimer" v-if="index == 0">
        <span>计时器</span>
      </button>
      <button class="btn btn-suspend" @click="suspendTimer" v-if="index > 0">
        <span v-if="index == 1">暂停</span>
        <span v-if="index == 2">开始</span>
      </button>
      <button class="btn btn-reset" @click="resetTimer" v-if="index == 1 || index == 2">
        <span>重置</span>
      </button>
    </div>
  </div>
  <script type="text/javascript">
    var app = new Vue({
      el: '#app',
      data: {
        index: 0,  // 0表示时钟页面,1表示计时器计时状态,2表示计时器暂停状态
        hour: '00', // 页面显示的数值
        min: '00',
        sec: '00',
        msec: '00',
        h: 0,    // 临时保存的数值
        m: 0,
        s: 0,
        ms: 0,
        timer: null,
        date: null
      },
      // 监视器
      watch: {
        index(newValue, oldValue) {
          clearInterval(this.timer);
          this.timer = null;
          this.date = null;
          // 从时钟页面click过来 或 从计时器页面click过来
          if (oldValue == 0 || newValue == 0) {  // index等于2时数据保留
            this.hour = '00'; 
            this.min = '00';
            this.sec = '00';
            this.msec = '00';
            this.h = 0; 
            this.m = 0;
            this.s = 0;
            this.ms = 0;
          }
          this.autoMove();
        }
      },
      methods: {
        // 自动计时
        autoMove() {
          if (this.index == 0) {
            this.timer = setInterval(res => {
              this.date = new Date();
              this.h = this.date.getHours();
              this.m = this.date.getMinutes();
              this.s = this.date.getSeconds();
              this.hour = this.h > 9 ? this.h : '0' + this.h;
              this.min = this.m > 9 ? this.m : '0' + this.m;
              this.sec = this.s > 9 ? this.s : '0' + this.s;
            }, 1000);
          } else if (this.index == 1){
            this.timer = setInterval(res => {
              this.ms ++;
              if (this.ms == 100) {
                this.s ++;
                this.ms = 0;
              }
              if (this.s == 60) {
                this.m ++;
                this.s = 0;
              }
              this.msec = this.ms > 9 ? this.ms : '0' + this.ms;
              this.min = this.m > 9 ? this.m : '0' + this.m;
              this.sec = this.s > 9 ? this.s : '0' + this.s;
            }, 10);
          }
        },
        // 选择时钟
        selectClock() {
          this.index = 0;
        },
        // 选择计时器
        selectTimer() {
          this.index = 1;
        },
        // 开始、暂停计时器
        suspendTimer() {
          if (this.index == 1) {
            this.index = 2;
          } else if (this.index == 2) {
            this.index = 1;
          }
        },
        // 重置计时器
        resetTimer() {
          this.index = 0;
          setTimeout(res => {
            this.index = 1;
          }, 1);
        }
      },
      mounted() {
        this.autoMove();
      }
    })
  </script>
</body>
</html>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持前端开发者。

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