228 lines
6.1 KiB
Vue
228 lines
6.1 KiB
Vue
<!-- 底部导航栏 -->
|
||
<template>
|
||
<view class="u-tabbar">
|
||
<view
|
||
class="u-tabbar__content"
|
||
ref="u-tabbar__content"
|
||
@touchmove.stop.prevent=""
|
||
:class="[border && 'u-border-top', fixed && 'u-tabbar--fixed', { 'mid-tabbar': midTabBar }]"
|
||
:style="[tabbarStyle]"
|
||
>
|
||
<view class="u-tabbar__content__item-wrapper">
|
||
<slot></slot>
|
||
</view>
|
||
<view v-if="safeAreaInsetBottom" :style="[{ height: safeBottomHeight + 'px' }]"></view>
|
||
</view>
|
||
<view
|
||
class="u-tabbar__placeholder"
|
||
v-if="placeholder"
|
||
:style="{
|
||
height: placeholderHeight + 'px',
|
||
}"
|
||
></view>
|
||
</view>
|
||
</template>
|
||
|
||
<script>
|
||
// #ifdef APP-NVUE
|
||
const dom = uni.requireNativePlugin('dom');
|
||
// #endif
|
||
/**
|
||
* Tabbar 底部导航栏
|
||
* @description 此组件提供了自定义tabbar的能力。
|
||
* @property {String | Number} value 当前匹配项的name
|
||
* @property {Boolean} safeAreaInsetBottom 是否为iPhoneX留出底部安全距离（默认 true ）
|
||
* @property {Boolean} border 是否显示上方边框（默认 true ）
|
||
* @property {String | Number} zIndex 元素层级z-index（默认 1 ）
|
||
* @property {String} activeColor 选中标签的颜色（默认 '#1989fa' ）
|
||
* @property {String} inactiveColor 未选中标签的颜色（默认 '#7d7e80' ）
|
||
* @property {Boolean} fixed 是否固定在底部（默认 true ）
|
||
* @property {Boolean} placeholder fixed定位固定在底部时，是否生成一个等高元素防止塌陷（默认 true ）
|
||
* @property {Object} customStyle 定义需要用到的外部样式
|
||
*
|
||
*/
|
||
|
||
import { deepMerge, addStyle, sleep } from '@/sheep/helper';
|
||
import sheep from '@/sheep';
|
||
|
||
export default {
|
||
name: 'su-tabbar',
|
||
props: {
|
||
customStyle: {
|
||
type: [Object, String],
|
||
default: () => ({}),
|
||
},
|
||
customClass: {
|
||
type: String,
|
||
default: '',
|
||
},
|
||
// 跳转的页面路径
|
||
url: {
|
||
type: String,
|
||
default: '',
|
||
},
|
||
// 页面跳转的类型
|
||
linkType: {
|
||
type: String,
|
||
default: 'navigateTo',
|
||
},
|
||
// 当前匹配项的name
|
||
value: {
|
||
type: [String, Number, null],
|
||
default: '',
|
||
},
|
||
// 是否为iPhoneX留出底部安全距离
|
||
safeAreaInsetBottom: {
|
||
type: Boolean,
|
||
default: true,
|
||
},
|
||
// 是否显示上方边框
|
||
border: {
|
||
type: Boolean,
|
||
default: true,
|
||
},
|
||
// 元素层级z-index
|
||
zIndex: {
|
||
type: [String, Number],
|
||
default: 10,
|
||
},
|
||
// 选中标签的颜色
|
||
activeColor: {
|
||
type: String,
|
||
default: '#1989fa',
|
||
},
|
||
// 未选中标签的颜色
|
||
inactiveColor: {
|
||
type: String,
|
||
default: '#7d7e80',
|
||
},
|
||
// 是否固定在底部
|
||
fixed: {
|
||
type: Boolean,
|
||
default: true,
|
||
},
|
||
// fixed定位固定在底部时，是否生成一个等高元素防止塌陷
|
||
placeholder: {
|
||
type: Boolean,
|
||
default: true,
|
||
},
|
||
midTabBar: {
|
||
type: Boolean,
|
||
default: false,
|
||
},
|
||
},
|
||
data() {
|
||
return {
|
||
placeholderHeight: 0,
|
||
safeBottomHeight: sheep.$platform.device.safeAreaInsets.bottom,
|
||
};
|
||
},
|
||
computed: {
|
||
tabbarStyle() {
|
||
const style = {
|
||
zIndex: this.zIndex,
|
||
};
|
||
// 合并来自父组件的customStyle样式
|
||
return deepMerge(style, addStyle(this.customStyle));
|
||
},
|
||
// 监听多个参数的变化，通过在computed执行对应的操作
|
||
updateChild() {
|
||
return [this.value, this.activeColor, this.inactiveColor];
|
||
},
|
||
updatePlaceholder() {
|
||
return [this.fixed, this.placeholder];
|
||
},
|
||
},
|
||
watch: {
|
||
updateChild() {
|
||
// 如果updateChildren中的元素发生了变化，则执行子元素初始化操作
|
||
this.updateChildren();
|
||
},
|
||
updatePlaceholder() {
|
||
// 如果fixed，placeholder等参数发生变化，重新计算占位元素的高度
|
||
this.setPlaceholderHeight();
|
||
},
|
||
},
|
||
created() {
|
||
this.children = [];
|
||
},
|
||
mounted() {
|
||
this.setPlaceholderHeight();
|
||
},
|
||
methods: {
|
||
updateChildren() {
|
||
// 如果存在子元素，则执行子元素的updateFromParent进行更新数据
|
||
this.children.length && this.children.map((child) => child.updateFromParent());
|
||
},
|
||
getRect(selector, all) {
|
||
return new Promise((resolve) => {
|
||
uni.createSelectorQuery()
|
||
.in(this)
|
||
[all ? 'selectAll' : 'select'](selector)
|
||
.boundingClientRect((rect) => {
|
||
if (all && Array.isArray(rect) && rect.length) {
|
||
resolve(rect);
|
||
}
|
||
if (!all && rect) {
|
||
resolve(rect);
|
||
}
|
||
})
|
||
.exec();
|
||
});
|
||
},
|
||
// 设置用于防止塌陷元素的高度
|
||
async setPlaceholderHeight() {
|
||
if (!this.fixed || !this.placeholder) return;
|
||
// 延时一定时间
|
||
await sleep(20);
|
||
// #ifndef APP-NVUE
|
||
this.getRect('.u-tabbar__content').then(({ height = 50 }) => {
|
||
// 修复IOS safearea bottom 未填充高度
|
||
this.placeholderHeight = height;
|
||
});
|
||
// #endif
|
||
|
||
// #ifdef APP-NVUE
|
||
dom.getComponentRect(this.$refs['u-tabbar__content'], (res) => {
|
||
const { size } = res;
|
||
this.placeholderHeight = size.height;
|
||
});
|
||
// #endif
|
||
},
|
||
},
|
||
};
|
||
</script>
|
||
|
||
<style lang="scss" scoped>
|
||
.u-tabbar {
|
||
display: flex;
|
||
flex: 1;
|
||
justify-content: center;
|
||
|
||
&__content {
|
||
display: flex;
|
||
flex-direction: column;
|
||
background-color: #fff;
|
||
box-shadow: 0px -2px 4px 0px rgba(51, 51, 51, 0.06);
|
||
|
||
&__item-wrapper {
|
||
height: 50px;
|
||
display: flex;
|
||
justify-content: space-around;
|
||
align-items: center;
|
||
}
|
||
}
|
||
|
||
.mid-tabbar {
|
||
border-radius: 30rpx 30rpx 0 0;
|
||
}
|
||
|
||
&--fixed {
|
||
position: fixed;
|
||
bottom: -1px;
|
||
left: 0;
|
||
right: 0;
|
||
}
|
||
}
|
||
</style>
|