vue loading动画效果

Vue中可以使用第三方库或者自己编写loading动画组件来实现loading效果。以下是一个简单的loading组件示例：

<template>
  <div class="loading-container" v-if="loading">
    <div class="loading-wrapper">
      <div class="loading-spinner"></div>
      <div class="loading-text">{{ text }}</div>
    </div>
  </div>
</template>

<script>
export default {
  props: {
    loading: {
      type: Boolean,
      default: false
    },
    text: {
      type: String,
      default: '加载中...'
    }
  }
}
</script>

<style>
.loading-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
}

.loading-wrapper {
  display: flex;
  align-items: center;
}

.loading-spinner {
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 0.8s ease-in-out infinite;
  margin-right: 10px;
}

.loading-text {
  color: #fff;
  font-size: 16px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
</style>

使用时，只需要在需要loading效果的组件中引入该组件并传入loading和text属性即可：

<template>
  <div>
    <loading :loading="loading" text="加载中..."></loading>
    <!-- 其他内容 -->
  </div>
</template>

<script>
import Loading from '@/components/Loading.vue'

export default {
  components: {
    Loading
  },
  data() {
    return {
      loading: false
    }
  },
  methods: {
    fetchData() {
      this.loading = true
      // 发送请求，获取数据
      // ...
      this.loading = false
    }
  }
}
</script>