【uniapp】小程序开发7：自定义组件、自动注册组件

一、自定义轮播图组件、自动注册

以首页轮播图组件为例。

1、创建组件文件src/components/my-swipper.vue

代码如下：

<template><view><view class="uni-margin-wrap"><swiper class="swiper" circular :indicator-dots="indicatorDots" :autoplay="autoplay" :interval="interval":duration="duration"><swiper-item><view class="swiper-item uni-bg-red">A</view></swiper-item><swiper-item><view class="swiper-item uni-bg-green">B</view></swiper-item><swiper-item><view class="swiper-item uni-bg-blue">C</view></swiper-item></swiper></view></view>
</template><script lang="ts">
export default {data() {return {background: ['color1', 'color2', 'color3'],indicatorDots: true,autoplay: true,interval: 2000,duration: 500}},methods: {changeIndicatorDots(e) {this.indicatorDots = !this.indicatorDots},changeAutoplay(e) {this.autoplay = !this.autoplay},intervalChange(e) {this.interval = e.target.value},durationChange(e) {this.duration = e.target.value}}
}
</script><style>.uni-margin-wrap {width: 690rpx;width: 100%;}.swiper {height: 300rpx;}.swiper-item {display: block;height: 300rpx;line-height: 300rpx;text-align: center;color: white;}.uni-bg-red{background-color: red;}.uni-bg-green{background-color: green;}.uni-bg-blue{background-color: blue;}
</style>

2、在pages.json中配置自动注册，添加配置代码"^my-(.*)": "@/components/my-$1.vue"

{"easycom": {"autoscan": true,"custom": {// uni-ui 规则如下配置"^uni-(.*)": "@dcloudio/uni-ui/lib/uni-$1/uni-$1.vue",// 自定义组件，配置自动导入"^my-(.*)": "@/components/my-$1.vue"}},// ... //	
}

3、在页面中直接使用<my-navbar/>

不用再手动import

<template><my-navbar/><view class="content"><image mode="aspectFill" class="logo" src="/static/logo.png" /><view class="text-area"><text class="title">{{ title }}</text></view></view>
</template>

4、配置ts类型提示

在组件目录components创建文件components.d.ts，内容如下，

import MySwipper from "./my-swipper.vue";
declare module '@vue/runtime-core' {export interface GlobalComponents {MySwipper: typeof MySwipper,}
}

在这里插入图片描述

二、增加轮播图指示点组件

uni-swiper-dot组件在swiper 基础上面增加了丰富的指示点样式。

UniHelper为我们提供了各种组件的类型声明，可以直接使用。如下面change事件中的ev参数 ev: UniHelper.SwiperOnChangeEvent。

使用轮播图指示点组件需要把swiper组件的默认指示点（indicator-dots）设置为false，否则会出现两层指示点。

核心参数

mode：指示点的类型，可选值：default 、round 、nav 、 indexes
current：当前指示点索引，必须是通过 swiper 的 change 事件获取到的 e.detail.current
dotsStyles：指示点样式
info：轮播图的数据，通过数组长度决定指示点个数
field：mode 为 nav 时，显示的内容字段（mode = nav 时必填）

<template><view><view class="uni-margin-wrap"><uni-swiper-dot class="uni-swiper-dot-box" @clickItem=clickItem :info="info" :current="current" :mode="mode":dots-styles="dotsStyles" field="content"><swiper class="swiper" circular :indicator-dots="indicatorDots" :autoplay="autoplay" :interval="interval":current="swiperDotIndex" :duration="duration" @change="onchange"><swiper-item v-for="(item, index) in info"><view :class="'swiper-item ' + item.colorClass">{{ item.content }}</view></swiper-item></swiper></uni-swiper-dot></view></view>
</template>

<script lang="ts">
export default {data() {return {indicatorDots: false,autoplay: true,interval: 2000,duration: 500,info: [{colorClass: 'uni-bg-red',content: '内容 A'},{colorClass: 'uni-bg-green',content: '内容 B'},{colorClass: 'uni-bg-blue',content: '内容 C'}],modeIndex: -1,styleIndex: -1,current: 0,mode: 'default',//default, dot, round, nav, indexesdotsStyles: {backgroundColor: 'rgba(83, 200, 249,0.3)',border: '1px rgba(83, 200, 249,0.3) solid',color: '#fff',selectedBackgroundColor: 'rgba(83, 200, 249,0.9)',selectedBorder: '1px rgba(83, 200, 249,0.9) solid'},swiperDotIndex: 0}},methods: {onchange(ev: UniHelper.SwiperOnChangeEvent) {this.current = ev.detail.current},clickItem(e: number) {this.swiperDotIndex = e}}
}
</script>