微信小程序(黑马优购:搜索)
一.自定义搜索组件
1.修正分类页面高度
获取高度应该减去搜索框占的50px
this.wh = sysInfo.windowHeight - 50
2.动态修改搜索框的背景颜色和圆角
<my-search></my-search>
<!-- <my-search :bgcolor=" 'green' " :radius="3"></my-search> --><template>
<view class="my-search-container"
:style="{ 'background-color': bgcolor }">
<view class="my-search-box"
:style="{ 'border-radius': radius + 'px' }"
>
<!-- 使用uni-ui提供的图标组件 -->
<uni-icons type="search" size="17"></uni-icons>
<text class="placeholder">搜索</text>
</view>
</view>
</template>
<script>
export default {
props:{
//背景颜色
bgcolor: {
type: String,
default: "#C00000"
},
//圆角尺寸
radius:{
type: Number,
default: 18 //px
}
},
data() {
return {
};
}
}
</script>
3.点击搜索框触发事件
<my-search @click="gotoSearch"></my-search>
gotoSearch(){
uni.navigateTo({
url: '/subpkg/search/search'
})
}<view class="my-search-container"
:style="{ 'background-color': bgcolor }"
@click="searchBoxHandler"
>
<view class="my-search-box"
:style="{ 'border-radius': radius + 'px' }"
>
<!-- 使用uni-ui提供的图标组件 -->
<uni-icons type="search" size="17"></uni-icons>
<text class="placeholder">搜索</text>
</view>
</view>
methods:{
searchBoxHandler(){
// console.log("~~~");
this.$emit('click')
}
}4.首页搜索框
<!-- 搜索组件 -->
<view class="search-box">
<my-search @click="gotoSearch"></my-search>
</view>
.search-box{
//设置定位效果为"吸顶"
position: sticky;
//吸顶的"位置"
top: 0;
//提高层级,防止被轮播图覆盖
z-index: 999;
}
二.搜索页面功能及布局
1.修改搜索框的背景颜色
<view class="search-box">
<uni-search-bar @input="input" :radius="100"
placeholder="请输入内容" cancel-button="none"></uni-search-bar>
</view>
2.手机上自动获取焦点
3.防抖处理
data() {
return {
timer: null,
kw: ''
};
},
methods:{
//input输入事件的处理函数
input(e){
clearTimeout(this.timer)
this.timer = setTimeout(()=>{
// console.log(e);
this.kw = e
},500)
}3.渲染搜索建议列表
<!-- 搜索建议列表 -->
<view class="sugg-list">
<view class="sugg-item" v-for="(item,i) in searchResults" :key="i">
<view class="goods-name">{{item.goods_name}}</view>
<uni-icons type="arrowright" size="16"></uni-icons>
</view>
</view>async getSearchList(){
//判断搜索关键词是否为空
if(this.kw.length === 0){
this.searchResults = []
return
}
const{ data: res } = await uni.$http.get('/api/public/v1/goods/qsearch',{ query: this.kw})
if(res.meta.status !== 200) {
return uni.$showMsg()
}
this.searchResults = res.message
}1)CSS样式
.sugg-list{
padding: 0 5px;
.sugg-item{
display: flex;
align-items: center;
justify-content: space-between;
font-size: 12px;
padding: 13px 0;
border-bottom: 1px solid #efefef;
.goods-name{
//文字不允许换行(单行文本)
white-space: nowrap;
//超出部分隐藏
overflow: hidden;
//超出部分用...替换
text-overflow: ellipsis;
}
}
}2)跳转商品详情页
<view class="sugg-item" v-for="(item,i) in searchResults"
:key="i" @click="gotoDetail(item)"> gotoDetail(item){
uni.navigateTo({
url: '/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
})
}4.搜索历史
v-if="searchResults.length !== 0" 展示搜索建议
<!-- 搜索历史 -->
<view class="history-box" v-else>
<!-- 标题区域 -->
<view class="history-title">
<text>搜索</text>
<uni-icons type="trash" size="17"></uni-icons>
</view>
<!-- 列表区域 -->
<view class="history-list">
<uni-tag :text="item" v-for="(item,i) in historyList" :key="i"></uni-tag>
</view>
</view>
.history-box{
padding: 0 5px;
.history-title{
display: flex;
justify-content: space-between;
height: 40px;
align-items: center;
font-size: 13px;
border-bottom: 1px solid #efefef;
}
.history-list{
display: flex;
flex-wrap: wrap;
//uni-tag标签自带
.uni-tag{
margin-top: 5px;
margin-right: 5px;
}
}
}1)去除重复并按照最新输入顺序进行排序
methods:{
//input输入事件的处理函数
input(e){
clearTimeout(this.timer)
this.timer = setTimeout(()=>{
// 顺序不能颠倒
this.kw = e
this.getSearchList()
},500)
// this.saveServhHistory()
},
async getSearchList(){
//判断搜索关键词是否为空
if(this.kw.length === 0){
this.searchResults = []
return
}
const{ data: res } = await uni.$http.get('/api/public/v1/goods/qsearch',{ query: this.kw})
if(res.meta.status !== 200) {
return uni.$showMsg()
}
this.searchResults = res.message
this.saveSearchHistory()
},
gotoDetail(item){
uni.navigateTo({
url: '/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
})
},
saveSearchHistory(){
//保存输入内容
// this.historyList.push(this.kw)
const set = new Set(this.historyList)
set.delete(this.kw)
set.add(this.kw)
console.log(set);
this.historyList = Array.from(set)
}
},
computed: {
//计算属性
histories(){
return [...this.historyList].reverse()
}
}
2)持久化存储
onLoad() {
this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
},
saveSearchHistory(){
//保存输入内容
// this.historyList.push(this.kw)
const set = new Set(this.historyList)
set.delete(this.kw)
set.add(this.kw)
console.log(set);
this.historyList = Array.from(set)
//对搜索历史数据，进行持久化的存储
uni.setStorageSync('kw',JSON.stringify(this.historyList))
}
3)清空历史数据
<view class="history-title">
<text>搜索</text>
<uni-icons type="trash" size="17" @click="clean"></uni-icons>
</view>
clean(){
this.historyList = []
uni.setStorageSync('kw','[]')
}4)点击搜索历史跳转商品列表页
<view class="history-list">
<uni-tag :text="item" v-for="(item,i) in histories" :key="i"
@click="gotoGoodsList(item)"
></uni-tag>
</view>
gotoGoodsList(kw){
uni.navigateTo({
url:'/subpkg/goods_list/goods_list?query='+kw
})
}