<template>
  <view>
    <page-head :title="title"></page-head>
    <view class="uni-padding-wrap">
      <view class="uni-hello-text uni-center" style="padding-bottom:25px;">
        旋转手机即可获取方位信息
      </view>
      <view class="direction">
        <view class="bg-compass-line"></view>
        <image class="bg-compass" src="../../../static/compass.png" :style="'transform: rotate('+direction+'deg)'">
        </image>
        <view class="direction-value">
          <text>{{direction}}</text>
          <text class="direction-degree">o</text>
        </view>
      </view>
    </view>
  </view>
</template>
<script>
  export default {
    data() {
      return {
        title: 'onCompassChange',
        direction: 0
      }
    },
    onReady: function () {
      uni.onCompassChange((res) => {
        console.log('onCompassChange', res)
        this.direction = res.direction
      })
    },
    onUnload() {
      uni.stopCompass();
      this.direction = 0;
    }
  }
</script>

<style>
  .direction {
    position: relative;
    margin-top: 35px;
    display: flex;
    width: 270px;
    height: 270px;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
  }

  .direction-value {
    position: relative;
    font-size: 100px;
    color: #353535;
    line-height: 1;
    z-index: 1;
  }

  .direction-degree {
    position: absolute;
    top: 0;
    right: -20px;
    font-size: 30px;
  }

  .bg-compass {
    position: absolute;
    top: 0;
    left: 0;
    width: 270px;
    height: 270px;
    transition: .1s;
  }

  .bg-compass-line {
    position: absolute;
    left: 134px;
    top: -5px;
    width: 3px;
    height: 28px;
    background-color: #1AAD19;
    border-radius: 100px;
    z-index: 1;
  }
</style>