随着技术的发展，开发的复杂度也越来越高，传统开发方式将一个系统做成了整块应用，经常出现的情况就是一个小小的改动或者一个小功能的增加可能会引起整体逻辑的修改，造成牵一发而动全身。
通过组件化开发，可以有效实现单独开发，单独维护，而且他们之间可以随意的进行组合。大大提升开发效率低，降低维护成本。 组件化对于任何一个业务场景复杂的前端应用以及经过多次迭代之后的产品来说都是必经之路。组件化要做的不仅仅是表面上看到的模块拆分解耦，其背后还有很多工作来支撑组件化的进行，例如结合业务特性的模块拆分策略、模块间的交互方式和构建系统等等
今天给大家介绍的一款组件是: 前端Vue自定义带历史记录的搜索框组件searchBar 支持搜索输入框清空 搜索历史存储记录清除， 附带完整代码下载地址：https://ext.dcloud.net.cn/plugin?id=13343
效果图如下:
# cc-hisSearchBar
#### 使用方法
```使用方法
// 不同的业务功能历史记录设置不同存储key
const kStorageKey = "storageKey"
// 执行搜索事件
doSearch() {
if (this.keyword == '') {
uni.showToast({
title: '请输入要搜索的内容',
icon: 'none'
});
return;
}
//
if (this.keyword && this.keyword !== '') {
this.saveKeyword(this.keyword); //保存为历史
}
uni.showLoading({
title: '搜索中...'
});
this.setData({
keywordList: []
});
uni.hideLoading()
uni.showModal({
title: "温馨提示",
content: '搜索的内容 = ' + this.keyword
})
},
//点击历史记录搜索
doHisSearch(item) {
console.log(item)
uni.showModal({
title: '点击的历史搜索条目',
content: '点击的历史搜索条目 = ' + item
})
},
```
#### HTML代码实现部分
```html
<template>
<view class="content">
<view class="search-box">
<view class="input-box">
<input type="text" adjust-position="true" v-model="keyword" :placeholder="defaultKeyword"
placeholder-class="search_text" @confirm="doSearch" data-key="false" confirm-type="search"
@input="onclear"></input>
<image src="/static/close.png" @tap="clears" v-if="shows == true"></image>
</view>
<view class="search-btn" @tap="doSearch" data-key="false" :style="'background:' + colors">搜索</view>
</view>
<view class="search-keyword">
<scroll-view class="keyword-box" scroll-y>
<view class="keyword-block" v-if="oldKeywordList.length>0">
<view class="keyword-list-header">
<view>历史搜索</view>
<view>
<image @tap="oldDelete" src="/static/delete.png"></image>
</view>
</view>
<view class="keyword">
<view v-for="(item, index) in oldKeywordList" :key="index" @tap="doHisSearch(item)">{{item}}
</view>
</view>
</view>
</scroll-view>
</view>
</view>
</template>
<script>
// 不同的业务功能历史记录设置不同存储key
const kStorageKey = "storageKey"
import Vue from 'vue'
Vue.mixin({
methods: {
setData: function(obj, callback) {
let that = this;
const handleData = (tepData, tepKey, afterKey) => {
tepKey = tepKey.split('.');
tepKey.forEach(item => {
if (tepData[item] === null || tepData[item] === undefined) {
let reg = /^[0-9]+$/;
tepData[item] = reg.test(afterKey) ? [] : {};
tepData = tepData[item];
} else {
tepData = tepData[item];
}
});
return tepData;
};
const isFn = function(value) {
return typeof value == 'function' || false;
};
Object.keys(obj).forEach(function(key) {
let val = obj[key];
key = key.replace(/\]/g, '').replace(/\[/g, '.');
let front, after;
let index_after = key.lastIndexOf('.');
if (index_after != -1) {
after = key.slice(index_after + 1);
front = handleData(that, key.slice(0, index_after), after);
} else {
after = key;
front = that;
}
if (front.$data && front.$data[after] === undefined) {
Object.defineProperty(front, after, {
get() {
return front.$data[after];
},
set(newValue) {
front.$data[after] = newValue;
that.$forceUpdate();
},
enumerable: true,
configurable: true
});
front[after] = val;
} else {
that.$set(front, after, val);
}
});
isFn(callback) && this.$nextTick(callback);
}
}
});
var app = getApp();
export default {
data() {
return {
defaultKeyword: "",
keyword: "",
oldKeywordList: [],
hotKeywordList: [],
keywordList: [],
forbid: '',
shows: false,
colors: ''
};
},
components: {},
props: {},
/**
* 生命周期函数--监听页面加载
*/
onLoad: function(options) {
this.setData({
colors: app.globalData.newColor
});
this.init();
},
methods: {
init() {
this.loadDefaultKeyword();
this.loadOldKeyword();
},
loadDefaultKeyword() {
//定义默认搜索关键字，可以自己实现ajax请求数据再赋值,用户未输入时，以水印方式显示在输入框，直接不输入内容搜索会搜索默认关键字
this.setData({
defaultKeyword: "请输入搜索的内容"
});
},
//加载历史搜索,自动读取本地Storage
loadOldKeyword() {
uni.getStorage({
key: kStorageKey,
success: res => {
var OldKeys = JSON.parse(res.data);
this.setData({
oldKeywordList: OldKeys
});
}
});
},
// 执行搜索事件
doSearch() {
if (this.keyword == '') {
uni.showToast({
title: '请输入要搜索的内容',
icon: 'none'
});
return;
}
//
if (this.keyword && this.keyword !== '') {
this.saveKeyword(this.keyword); //保存为历史
}
uni.showLoading({
title: '搜索中...'
});
this.setData({
keywordList: []
});
uni.hideLoading()
uni.showModal({
title: "温馨提示",
content: '搜索的内容 = ' + this.keyword
})
// uni.showToast({
// title: '暂无结果',
// icon: 'none'
// })
},
onclear(e) {
this.setData({
keyword: e.detail.value,
shows: e.detail.value !== '' ? true : false
});
},
//保存关键字到历史记录
saveKeyword(keyword) {
uni.getStorage({
key: kStorageKey,
success: res => {
var OldKeys = JSON.parse(res.data);
var findIndex = OldKeys.indexOf(keyword);
if (findIndex == -1) {
OldKeys.unshift(keyword);
} else {
OldKeys.splice(findIndex, 1);
OldKeys.unshift(keyword);
} //最多10个纪录
OldKeys.length > 10 && OldKeys.pop();
uni.setStorage({
key: kStorageKey,
data: JSON.stringify(OldKeys)
});
this.setData({
oldKeywordList: OldKeys //更新历史搜索
});
},
fail: e => {
var OldKeys = [keyword];
uni.setStorage({
key: kStorageKey,
data: JSON.stringify(OldKeys)
});
this.setData({
oldKeywordList: OldKeys //更新历史搜索
});
}
});
},
oldDelete() {
uni.showModal({
content: '确定清除历史搜索记录？',
success: res => {
if (res.confirm) {
console.log('用户点击确定');
this.setData({
oldKeywordList: []
});
uni.removeStorage({
key: kStorageKey
});
} else if (res.cancel) {
console.log('用户点击取消');
}
}
});
},
clears() {
this.setData({
keyword: '',
keywordList: [],
});
},
//点击历史记录搜索
doHisSearch(item) {
console.log(item)
uni.showModal({
title: '点击的历史搜索条目',
content: '点击的历史搜索条目 = ' + item
})
},
}
};
</script>
<style scoped lang="scss">
view {
display: block;
}
.search-box {
background-color: rgb(242, 242, 242);
padding: 15upx 2.5%;
display: flex;
justify-content: space-between;
position: sticky;
top: 0;
}
.search-box .mSearch-input-box {
width: 100%;
}
.search-box .input-box {
width: 85%;
flex-shrink: 1;
display: flex;
justify-content: center;
align-items: center;
}
.search-box .search-btn {
width: 15%;
margin: 0 0 0 2%;
display: flex;
justify-content: center;
align-items: center;
flex-shrink: 0;
font-size: 24upx;
color: #fff;
background: linear-gradient(to right, #4492EB, #3F92EE);
border-radius: 60upx;
}
.search-box .input-box>input {
width: 95%;
height: 60upx;
font-size: 24upx;
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
margin: 0;
background-color: #ffffff;
}
.placeholder-class {
color: #9e9e9e;
}
.search-keyword {
width: 100%;
background-color: rgb(242, 242, 242);
}
.keyword-list-box {
height: calc(100vh - 110upx);
padding-top: 10upx;
border-radius: 20upx 20upx 0 0;
background-color: #fff;
}
.keyword-entry-tap {
background-color: #eee;
}
.keyword-entry {
width: 94%;
height: 80upx;
margin: 0 3%;
font-size: 30upx;
color: #333;
display: flex;
justify-content: space-between;
align-items: center;
border-bottom: solid 1upx #e7e7e7;
}
.keyword-entry image {
width: 60upx;
height: 60upx;
}
.keyword-entry .keyword-text,
.keyword-entry .keyword-img {
height: 80upx;
display: flex;
align-items: center;
}
.keyword-entry .keyword-text {
width: 90%;
}
.keyword-entry .keyword-img {
width: 10%;
justify-content: center;
}
.keyword-box {
height: calc(100vh - 110upx);
border-radius: 20upx 20upx 0 0;
background-color: #fff;
}
.keyword-box .keyword-block {
padding: 10upx 0;
}
.keyword-box .keyword-block .keyword-list-header {
width: 94%;
padding: 10upx 3%;
font-size: 27upx;
color: #333;
display: flex;
justify-content: space-between;
}
.keyword-box .keyword-block .keyword-list-header image {
width: 40upx;
height: 40upx;
}
.keyword-box .keyword-block .keyword {
width: 94%;
padding: 3px 3%;
display: flex;
flex-flow: wrap;
justify-content: flex-start;
}
.keyword-box .keyword-block .hide-hot-tis {
display: flex;
justify-content: center;
font-size: 28upx;
color: #6b6b6b;
}
.keyword-box .keyword-block .keyword>view {
display: flex;
justify-content: center;
align-items: center;
border-radius: 38upx;
padding: 0 20upx;
margin: 10upx 20upx 10upx 0;
height: 60upx;
font-size: 24upx;
background-color: rgb(242, 242, 242);
color: #6b6b6b;
line-height: 60upx;
}
.search_text {
font-size: 24upx;
color: #B6B6C6;
}
.input-box {
position: relative;
height: 60upx;
font-size: 24upx;
border: 0;
border-radius: 60upx;
-webkit-appearance: none;
appearance: none;
padding: 0 3%;
margin: 0;
background-color: #ffffff;
}
.input-box image {
height: 40upx;
width: 40upx;
float: right;
position: absolute;
right: 2%;
top: 50%;
transform: translateY(-50%);
z-index: 100;
}
</style>
```
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