You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
299 lines
9.2 KiB
299 lines
9.2 KiB
7 months ago
|
<template>
|
||
|
|
<view class="u-dropdown">
|
||
|
|
<view class="u-dropdown__menu" :style="{
|
||
|
|
height: $u.addUnit(height)
|
||
|
|
}" :class="{
|
||
|
|
'u-border-bottom': borderBottom
|
||
|
|
}">
|
||
|
|
<view class="u-dropdown__menu__item" v-for="(item, index) in menuList" :key="index" @tap.stop="menuClick(index)">
|
||
|
|
<view class="u-flex">
|
||
|
|
<text class="u-dropdown__menu__item__text" :style="{
|
||
|
|
color: item.disabled ? '#c0c4cc' : (index === current || highlightIndex == index) ? activeColor : inactiveColor,
|
||
|
|
fontSize: $u.addUnit(titleSize)
|
||
|
|
}">{{item.title}}</text>
|
||
|
|
<view class="u-dropdown__menu__item__arrow" :class="{
|
||
|
|
'u-dropdown__menu__item__arrow--rotate': index === current
|
||
|
|
}">
|
||
|
|
<u-icon :custom-style="{display: 'flex'}" :name="menuIcon" :size="$u.addUnit(menuIconSize)" :color="index === current || highlightIndex == index ? activeColor : '#c0c4cc'"></u-icon>
|
||
|
|
</view>
|
||
|
|
</view>
|
||
|
|
</view>
|
||
|
|
</view>
|
||
|
|
<view class="u-dropdown__content" :style="[contentStyle, {
|
||
|
|
transition: `opacity ${duration / 1000}s linear`,
|
||
|
|
top: $u.addUnit(height),
|
||
|
|
height: contentHeight + 'px'
|
||
|
|
}]"
|
||
|
|
@tap="maskClick" @touchmove.stop.prevent>
|
||
|
|
<view @tap.stop.prevent class="u-dropdown__content__popup" :style="[popupStyle]">
|
||
|
|
<slot></slot>
|
||
|
|
</view>
|
||
|
|
<view class="u-dropdown__content__mask"></view>
|
||
|
|
</view>
|
||
|
|
</view>
|
||
|
|
</template>
|
||
|
|
|
||
|
|
<script>
|
||
|
|
/**
|
||
|
|
* dropdown 下拉菜单
|
||
|
|
* @description 该组件一般用于向下展开菜单，同时可切换多个选项卡的场景
|
||
|
|
* @tutorial http://uviewui.com/components/dropdown.html
|
||
|
|
* @property {String} active-color 标题和选项卡选中的颜色（默认#2979ff）
|
||
|
|
* @property {String} inactive-color 标题和选项卡未选中的颜色（默认#606266）
|
||
|
|
* @property {Boolean} close-on-click-mask 点击遮罩是否关闭菜单（默认true）
|
||
|
|
* @property {Boolean} close-on-click-self 点击当前激活项标题是否关闭菜单（默认true）
|
||
|
|
* @property {String | Number} duration 选项卡展开和收起的过渡时间，单位ms（默认300）
|
||
|
|
* @property {String | Number} height 标题菜单的高度，单位任意（默认80）
|
||
|
|
* @property {String | Number} border-radius 菜单展开内容下方的圆角值，单位任意（默认0）
|
||
|
|
* @property {Boolean} border-bottom 标题菜单是否显示下边框（默认false）
|
||
|
|
* @property {String | Number} title-size 标题的字体大小，单位任意，数值默认为rpx单位（默认28）
|
||
|
|
* @event {Function} open 下拉菜单被打开时触发
|
||
|
|
* @event {Function} close 下拉菜单被关闭时触发
|
||
|
|
* @example <u-dropdown></u-dropdown>
|
||
|
|
*/
|
||
|
|
export default {
|
||
|
|
name: 'u-dropdown',
|
||
|
|
props: {
|
||
|
|
// 菜单标题和选项的激活态颜色
|
||
|
|
activeColor: {
|
||
|
|
type: String,
|
||
|
|
default: '#2979ff'
|
||
|
|
},
|
||
|
|
// 菜单标题和选项的未激活态颜色
|
||
|
|
inactiveColor: {
|
||
|
|
type: String,
|
||
|
|
default: '#606266'
|
||
|
|
},
|
||
|
|
// 点击遮罩是否关闭菜单
|
||
|
|
closeOnClickMask: {
|
||
|
|
type: Boolean,
|
||
|
|
default: true
|
||
|
|
},
|
||
|
|
// 点击当前激活项标题是否关闭菜单
|
||
|
|
closeOnClickSelf: {
|
||
|
|
type: Boolean,
|
||
|
|
default: true
|
||
|
|
},
|
||
|
|
// 过渡时间
|
||
|
|
duration: {
|
||
|
|
type: [Number, String],
|
||
|
|
default: 300
|
||
|
|
},
|
||
|
|
// 标题菜单的高度，单位任意，数值默认为rpx单位
|
||
|
|
height: {
|
||
|
|
type: [Number, String],
|
||
|
|
default: 80
|
||
|
|
},
|
||
|
|
// 是否显示下边框
|
||
|
|
borderBottom: {
|
||
|
|
type: Boolean,
|
||
|
|
default: false
|
||
|
|
},
|
||
|
|
// 标题的字体大小
|
||
|
|
titleSize: {
|
||
|
|
type: [Number, String],
|
||
|
|
default: 28
|
||
|
|
},
|
||
|
|
// 下拉出来的内容部分的圆角值
|
||
|
|
borderRadius: {
|
||
|
|
type: [Number, String],
|
||
|
|
default: 0
|
||
|
|
},
|
||
|
|
// 菜单右侧的icon图标
|
||
|
|
menuIcon: {
|
||
|
|
type: String,
|
||
|
|
default: 'arrow-down'
|
||
|
|
},
|
||
|
|
// 菜单右侧图标的大小
|
||
|
|
menuIconSize: {
|
||
|
|
type: [Number, String],
|
||
|
|
default: 26
|
||
|
|
}
|
||
|
|
},
|
||
|
|
data() {
|
||
|
|
return {
|
||
|
|
showDropdown: true, // 是否打开下来菜单,
|
||
|
|
menuList: [], // 显示的菜单
|
||
|
|
active: false, // 下拉菜单的状态
|
||
|
|
// 当前是第几个菜单处于激活状态，小程序中此处不能写成false或者""，否则后续将current赋值为0，
|
||
|
|
// 无能的TX没有使用===而是使用==判断，导致程序认为前后二者没有变化，从而不会触发视图更新
|
||
|
|
current: 99999,
|
||
|
|
// 外层内容的样式，初始时处于底层，且透明
|
||
|
|
contentStyle: {
|
||
|
|
zIndex: -1,
|
||
|
|
opacity: 0
|
||
|
|
},
|
||
|
|
// 让某个菜单保持高亮的状态
|
||
|
|
highlightIndex: 99999,
|
||
|
|
contentHeight: 0
|
||
|
|
}
|
||
|
|
},
|
||
|
|
computed: {
|
||
|
|
// 下拉出来部分的样式
|
||
|
|
popupStyle() {
|
||
|
|
let style = {};
|
||
|
|
// 进行Y轴位移，展开状态时，恢复原位。收齐状态时，往上位移100%，进行隐藏
|
||
|
|
style.transform = `translateY(${this.active ? 0 : '-100%'})`
|
||
|
|
style['transition-duration'] = this.duration / 1000 + 's';
|
||
|
|
style.borderRadius = `0 0 ${this.$u.addUnit(this.borderRadius)} ${this.$u.addUnit(this.borderRadius)}`;
|
||
|
|
return style;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
created() {
|
||
|
|
// 引用所有子组件(u-dropdown-item)的this，不能在data中声明变量，否则在微信小程序会造成循环引用而报错
|
||
|
|
this.children = [];
|
||
|
|
},
|
||
|
|
mounted() {
|
||
|
|
this.getContentHeight();
|
||
|
|
},
|
||
|
|
methods: {
|
||
|
|
init() {
|
||
|
|
// 当某个子组件内容变化时，触发父组件的init，父组件再让每一个子组件重新初始化一遍
|
||
|
|
// 以保证数据的正确性
|
||
|
|
this.menuList = [];
|
||
|
|
this.children.map(child => {
|
||
|
|
child.init();
|
||
|
|
})
|
||
|
|
},
|
||
|
|
// 点击菜单
|
||
|
|
menuClick(index) {
|
||
|
|
// 判断是否被禁用
|
||
|
|
if (this.menuList[index].disabled) return;
|
||
|
|
// 如果点击时的索引和当前激活项索引相同，意味着点击了激活项，需要收起下拉菜单
|
||
|
|
if (index === this.current && this.closeOnClickSelf) {
|
||
|
|
this.close();
|
||
|
|
// 等动画结束后，再移除下拉菜单中的内容，否则直接移除，也就没有下拉菜单收起的效果了
|
||
|
|
setTimeout(() => {
|
||
|
|
this.children[index].active = false;
|
||
|
|
}, this.duration)
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
this.open(index);
|
||
|
|
},
|
||
|
|
// 打开下拉菜单
|
||
|
|
open(index) {
|
||
|
|
// 重置高亮索引，否则会造成多个菜单同时高亮
|
||
|
|
// this.highlightIndex = 9999;
|
||
|
|
// 展开时，设置下拉内容的样式
|
||
|
|
this.contentStyle = {
|
||
|
|
zIndex: 11,
|
||
|
|
}
|
||
|
|
// 标记展开状态以及当前展开项的索引
|
||
|
|
this.active = true;
|
||
|
|
this.current = index;
|
||
|
|
// 历遍所有的子元素，将索引匹配的项标记为激活状态，因为子元素是通过v-if控制切换的
|
||
|
|
// 之所以不是因display: none，是因为nvue没有display这个属性
|
||
|
|
this.children.map((val, idx) => {
|
||
|
|
val.active = index == idx ? true : false;
|
||
|
|
})
|
||
|
|
this.$emit('open', this.current);
|
||
|
|
},
|
||
|
|
// 设置下拉菜单处于收起状态
|
||
|
|
close() {
|
||
|
|
this.$emit('close', this.current);
|
||
|
|
// 设置为收起状态，同时current归位，设置为空字符串
|
||
|
|
this.active = false;
|
||
|
|
this.current = 99999;
|
||
|
|
// 下拉内容的样式进行调整，不透明度设置为0
|
||
|
|
this.contentStyle = {
|
||
|
|
zIndex: -1,
|
||
|
|
opacity: 0
|
||
|
|
}
|
||
|
|
},
|
||
|
|
// 点击遮罩
|
||
|
|
maskClick() {
|
||
|
|
// 如果不允许点击遮罩，直接返回
|
||
|
|
if (!this.closeOnClickMask) return;
|
||
|
|
this.close();
|
||
|
|
},
|
||
|
|
// 外部手动设置某个菜单高亮
|
||
|
|
highlight(index = undefined) {
|
||
|
|
this.highlightIndex = index !== undefined ? index : 99999;
|
||
|
|
},
|
||
|
|
// 获取下拉菜单内容的高度
|
||
|
|
getContentHeight() {
|
||
|
|
// 这里的原理为，因为dropdown组件是相对定位的，它的下拉出来的内容，必须给定一个高度
|
||
|
|
// 才能让遮罩占满菜单一下，直到屏幕底部的高度
|
||
|
|
// this.$u.sys()为uView封装的获取设备信息的方法
|
||
|
|
let windowHeight = this.$u.sys().windowHeight;
|
||
|
|
this.$uGetRect('.u-dropdown__menu').then(res => {
|
||
|
|
// 这里获取的是dropdown的尺寸，在H5上，uniapp获取尺寸是有bug的(以前提出修复过，后来又出现了此bug，目前hx2.8.11版本)
|
||
|
|
// H5端bug表现为元素尺寸的top值为导航栏底部到到元素的上边沿的距离，但是元素的bottom值确是导航栏顶部到元素底部的距离
|
||
|
|
// 二者是互相矛盾的，本质原因是H5端导航栏非原生，uni的开发者大意造成
|
||
|
|
// 这里取菜单栏的botton值合理的，不能用res.top，否则页面会造成滚动
|
||
|
|
this.contentHeight = windowHeight - res.bottom;
|
||
|
|
})
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<style scoped lang="scss">
|
||
|
|
@import "../../libs/css/style.components.scss";
|
||
|
|
|
||
|
|
.u-dropdown {
|
||
|
|
flex: 1;
|
||
|
|
width: 100%;
|
||
|
|
position: relative;
|
||
|
|
|
||
|
|
&__menu {
|
||
|
|
@include vue-flex;
|
||
|
|
position: relative;
|
||
|
|
z-index: 11;
|
||
|
|
height: 80rpx;
|
||
|
|
|
||
|
|
&__item {
|
||
|
|
flex: 1;
|
||
|
|
@include vue-flex;
|
||
|
|
justify-content: center;
|
||
|
|
align-items: center;
|
||
|
|
|
||
|
|
&__text {
|
||
|
|
font-size: 28rpx;
|
||
|
|
color: $u-content-color;
|
||
|
|
}
|
||
|
|
|
||
|
|
&__arrow {
|
||
|
|
margin-left: 6rpx;
|
||
|
|
transition: transform .3s;
|
||
|
|
align-items: center;
|
||
|
|
@include vue-flex;
|
||
|
|
|
||
|
|
&--rotate {
|
||
|
|
transform: rotate(180deg);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
&__content {
|
||
|
|
position: absolute;
|
||
|
|
z-index: 8;
|
||
|
|
width: 100%;
|
||
|
|
left: 0px;
|
||
|
|
bottom: 0;
|
||
|
|
overflow: hidden;
|
||
|
|
|
||
|
|
|
||
|
|
&__mask {
|
||
|
|
position: absolute;
|
||
|
|
z-index: 9;
|
||
|
|
background: rgba(0, 0, 0, .3);
|
||
|
|
width: 100%;
|
||
|
|
left: 0;
|
||
|
|
top: 0;
|
||
|
|
bottom: 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
&__popup {
|
||
|
|
position: relative;
|
||
|
|
z-index: 10;
|
||
|
|
transition: all 0.3s;
|
||
|
|
transform: translate3D(0, -100%, 0);
|
||
|
|
overflow: hidden;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
</style>
|