小鹹兒又來給大家分享新知識了。最近小鹹兒在做前端是Vue的項目,初步接觸之下,感覺這是一個很有意思的框架,看起來十分的簡單。
首先來看一下Vue是什麼?
在介紹Vue是什麼之前,來看一下從哪裏瞭解Vue呢?
一是百度百科,百度一下Vue是什麼?
百度介紹:Vue.js是一個構建數據驅動的web界面的漸進式框架。Vue.js的目標是通過儘可能簡單的API實現響應的數據綁定和組合的視圖組件。
說完百度的介紹了,接下來從官網介紹來認識一下它:
那麼二就是Vue官網:Vue.js
從官網首頁中就可以看出Vue是漸進式JavaScript框架,易用、靈活和高效。而且Vue還有一個好處就是中文社區文檔都比較齊全,想要尋找什麼功能組件都可以輕易的找到。瞭解發展史和該如何搭建都有一套模板,方便實用。
三是小鹹兒使用的是iview:https://www.iviewui.com
這個文檔十分強大,而且學習起來十分方面,組件也很全面,在新手實踐方面起到了強大的引導功能。
在通過這三個方面的學習就對於Vue有了不少的瞭解了。接下來就是了解一下在編寫代碼的頁面中它的佈局:
這裏就相當於HTML頁面,編寫頁面顯示的代碼
<template>
<div class="demo-upload-list" v-for="item in uploadList">
<template v-if="item.status === 'finished'">
<img :src="item.url">
<div class="demo-upload-list-cover">
<Icon type="ios-eye-outline" @click.native="handleView(item.name)"></Icon>
<Icon type="ios-trash-outline" @click.native="handleRemove(item)"></Icon>
</div>
</template>
<template v-else>
<Progress v-if="item.showProgress" :percent="item.percentage" hide-info></Progress>
</template>
</div>
<Upload
ref="upload"
:show-upload-list="false"
:default-file-list="defaultList"
:on-success="handleSuccess"
:format="['jpg','jpeg','png']"
:max-size="2048"
:on-format-error="handleFormatError"
:on-exceeded-size="handleMaxSize"
:before-upload="handleBeforeUpload"
multiple
type="drag"
action="//jsonplaceholder.typicode.com/posts/"
style="display: inline-block;width:58px;">
<div style="width: 58px;height:58px;line-height: 58px;">
<Icon type="ios-camera" size="20"></Icon>
</div>
</Upload>
<Modal title="View Image" v-model="visible">
<img :src="'https://o5wwk8baw.qnssl.com/' + imgName + '/large'" v-if="visible" style="width: 100%">
</Modal>
</template>
這裏則是寫方法的地方,相當於js頁面
<script>
export default {
data () {
return {
defaultList: [
{
'name': 'a42bdcc1178e62b4694c830f028db5c0',
'url': 'https://o5wwk8baw.qnssl.com/a42bdcc1178e62b4694c830f028db5c0/avatar'
},
{
'name': 'bc7521e033abdd1e92222d733590f104',
'url': 'https://o5wwk8baw.qnssl.com/bc7521e033abdd1e92222d733590f104/avatar'
}
],
imgName: '',
visible: false,
uploadList: []
}
},
methods: {
handleView (name) {
this.imgName = name;
this.visible = true;
},
handleRemove (file) {
const fileList = this.$refs.upload.fileList;
this.$refs.upload.fileList.splice(fileList.indexOf(file), 1);
},
handleSuccess (res, file) {
file.url = 'https://o5wwk8baw.qnssl.com/7eb99afb9d5f317c912f08b5212fd69a/avatar';
file.name = '7eb99afb9d5f317c912f08b5212fd69a';
},
handleFormatError (file) {
this.$Notice.warning({
title: 'The file format is incorrect',
desc: 'File format of ' + file.name + ' is incorrect, please select jpg or png.'
});
},
handleMaxSize (file) {
this.$Notice.warning({
title: 'Exceeding file size limit',
desc: 'File ' + file.name + ' is too large, no more than 2M.'
});
},
handleBeforeUpload () {
const check = this.uploadList.length < 5;
if (!check) {
this.$Notice.warning({
title: 'Up to five pictures can be uploaded.'
});
}
return check;
}
},
mounted () {
this.uploadList = this.$refs.upload.fileList;
}
}
</script>
最後style這裏,聽名字也能想到這裏就是調試頁面樣式的地方了,就相當於CSS頁面。
<style>
.demo-upload-list{
display: inline-block;
width: 60px;
height: 60px;
text-align: center;
line-height: 60px;
border: 1px solid transparent;
border-radius: 4px;
overflow: hidden;
background: #fff;
position: relative;
box-shadow: 0 1px 1px rgba(0,0,0,.2);
margin-right: 4px;
}
.demo-upload-list img{
width: 100%;
height: 100%;
}
.demo-upload-list-cover{
display: none;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
background: rgba(0,0,0,.6);
}
.demo-upload-list:hover .demo-upload-list-cover{
display: block;
}
.demo-upload-list-cover i{
color: #fff;
font-size: 20px;
cursor: pointer;
margin: 0 2px;
}
</style>
這個功能是可以實現的,大家可以嘗試一下,會有驚喜哦!