信号强度

需求

vue项目，需要实时监控系统信号，要求：

1.共五格信号；
2.信号0-100为满值，信号100-500为四格，信号500-1000为三格，信号1000-5000为两格，信号5000-20000为一格，大于20000为无信号；
3.信号0-100为绿色，信号100-500为绿色，信号500-1000为黄色，信号1000-5000为黄色，信号5000-20000为红色，大于20000为灰色。

效果

图标地址

免费 信号图标-六个图标-图标资源

https://download.csdn.net/download/xuelong5201314/88701607

代码

signalStrength.vue 文件

<!-- 信号强度 -->
<template>
  <div class="signal-strength">
    <img v-if="strength === 5" :src="url5" />
    <img v-else-if="strength === 4" :src="url4" />
    <img v-else-if="strength === 3" :src="url3" />
    <img v-else-if="strength === 2" :src="url2" />
    <img v-else-if="strength === 1" :src="url1" />
    <img v-else :src="url0" />
  </div>
</template>

<script>
export default {
  name: 'SignalStrength',
  props: {
    // 信号强度，默认满格信号
    strength: {
      type: Number,
      default: 5,
      validator: function (value) {
        // 必须为不大于5的整数
        if (value > 5 || value < 0) {
          return false
        } else {
          return true
        }
      }
    }
  },
  data() {
    return {
      url0: require('@/assets/image/signal-0.png'),
      url1: require('@/assets/image/signal-1.png'),
      url2: require('@/assets/image/signal-2.png'),
      url3: require('@/assets/image/signal-3.png'),
      url4: require('@/assets/image/signal-4.png'),
      url5: require('@/assets/image/signal-5.png')
    }
  }
}
</script>

<style lang="scss" scoped>
.signal-strength {
  width: 16px;
  height: 16px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translate(-50%, -50%);
  img {
    -webkit-user-drag: none;
    user-select: none;
  }
}
</style>

index.vue 父组件

<template>
	<div class="content-piece">
		<div class="content-item-two">
			网络延迟：
			<span v-if="systemSignal > 0">{{ systemSignal }}ms</span> <span v-else>无信号</span>
 			网络信号：
			<div class="signal-box">
				<signal-strength :strength="systemSignalNum"></signal-strength>
			</div>
		</div>
	</div>
</template>

<script>
import signalStrength from './signalStrength.vue'
import api from './api'
export default {
  components: {
    signalStrength
  },
  data() {
    return {
      systemSignal: 0, // 系统信号
      systemSignalNum: 0 // 系统信号栏
    }
  },
  created() {
    this.getSignal()
  },
  beforeDestroy() {
    // 销毁定时器
    clearInterval(this.timer)
  },
  methods: {
    // 获取系统信号延迟
    getSystemSignal() {
      const time = new Date().getTime()
      // 当前请求没有返回值，通过计算请求成功后的时间与发送请求前的时间之差获取当前信号
      api.getSystem().then(res => {
        const delay = new Date().getTime() - time
        this.systemSignal = delay
        this.systemSignalNum = this.calculateSignal(delay)
      }).catch(() => {
        this.systemSignal = -1 // 系统信号
        this.systemSignalNum = 0 // 系统信号栏
      })
    },
    // 获取信号延迟
    getSignal() {
      this.getSystemSignal()
      this.timer = setInterval(() => {
        this.getSystemSignal()
      }, 3000)
    },
    // 计算信号
    calculateSignal(num) {
      let signalValue = 0
      if (num <= 100 && num > 0) {
        signalValue = 5
      } else if (num > 100 && num <= 500) {
        signalValue = 4
      } else if (num > 500 && num <= 1000) {
        signalValue = 3
      } else if (num > 1000 && num <= 5000) {
        signalValue = 2
      } else if (num > 5000 && num <= 20000) {
        signalValue = 1
      } else {
        signalValue = 0
      }
      return signalValue
    }
  }
}
</script>