进入页面加载数据缓慢实现loading提示
比如进入一个页面数据加载缓慢的页面后，等待后端返回数据显示在页面时给个loading的样式
像下面这样：
代码实现如下：
getStudent() {
// 开始加载
let loading = this.$loading({
lock: true,//lock的修改符--默认是false
text: "拼命加载中，请稍候...",//显示在加载图标下方的加载文案
background: "rgba(0,0,0,0.8)",//遮罩层颜色
spinner: "el-icon-loading",//自定义加载图标类名
});
getStudent().then(res => {
if (res.code === 200) {
this.user = res.data;
// 获取数据显示成功后，关闭loading
loading.close();
} else {
this.$message.error("错误！");
}
});
}
参数列表说明如下（详细可以观看elementUI官网）
| 参数 | 说明 | 类型 | 默认值 |
|---|---|---|---|
| target | Loading 需要覆盖的 DOM 节点。可传入一个 DOM 对象或字符串；若传入字符串，则会将其作为参数传入 document.querySelector以获取到对应 DOM 节点 | object/string | document.body |
| body | 同 v-loading 指令中的 body 修饰符 | boolean | false |
| fullscreen | 同 v-loading 指令中的 fullscreen 修饰符 | boolean | true |
| lock | 同 v-loading 指令中的 lock 修饰符 | boolean | false |
| text | 显示在加载图标下方的加载文案 | string | — |
| spinner | 自定义加载图标类名 | string | — |
| background | 自定义加载图标类名 | string | — |
| customClass | 自定义加载图标类名 | string | — |
vue中加载loading问题
首先在components文件夹中新建一个loading.vue组件：
1.loading.vue组件内容如下
<template>
<div class="markbox" v-show="loading" style="background-color: rgba(0, 0, 0, 0.5);">
<div class="sun-loading"></div>
</div>
</template><script>
export default {
name: 'loading',
data() {
return {
loading: false
}
},
created() {
var that = this;
this.bus.$on('loading', function(data) {
that.loading = !!data;
})
}
}
</script>css代码：
/*loading开始*/
.sun-loading {
width: 45px;
height: 45px;
display: block;
animation: sunLoading 1s steps(12, end) infinite;
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background-size: 100%;
margin:auto;
position:absolute;
top: 0;
left: 0;
bottom: 0;
right:0;
}
/*loading结束*/ 2.app.vue中设置
<template>
<div id="app">
<router-view/>
<loading></loading>
</div>
</template>
<script>
import loading from '@/components/common/loading'
export default {
name: 'App',
components:{loading}
}
</script>3.在main.js中设置
Vue.prototype.bus = new Vue;
4.在.vue组件中使用
// 显示loading
this.bus.$emit('loading', true);
// 关闭loading
this.bus.$emit('loading', false);效果如下：
以上为个人经验，希望能给大家一个参考，也希望大家多多支持Devmax。