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.
141 lines
3.9 KiB
141 lines
3.9 KiB
<template>
|
|
<view class="u-tabbar">
|
|
<view
|
|
class="u-tabbar__content"
|
|
ref="u-tabbar__content"
|
|
@touchmove.stop.prevent="noop"
|
|
:class="[border && 'u-border-top', fixed && 'u-tabbar--fixed']"
|
|
:style="[tabbarStyle]"
|
|
>
|
|
<view class="u-tabbar__content__item-wrapper">
|
|
<slot />
|
|
</view>
|
|
<u-safe-bottom v-if="safeAreaInsetBottom"></u-safe-bottom>
|
|
</view>
|
|
<view
|
|
class="u-tabbar__placeholder"
|
|
v-if="placeholder"
|
|
:style="{
|
|
height: placeholderHeight + 'px',
|
|
}"
|
|
></view>
|
|
</view>
|
|
</template>
|
|
|
|
<script>
|
|
import props from './props.js';
|
|
// #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。
|
|
* @tutorial https://www.uviewui.com/components/tabbar.html
|
|
* @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
|
|
*
|
|
* @example <u-tabbar :value="value2" :placeholder="false" @change="name => value2 = name" :fixed="false" :safeAreaInsetBottom="false"><u-tabbar-item text="首页" icon="home" dot ></u-tabbar-item></u-tabbar>
|
|
*/
|
|
export default {
|
|
name: 'u-tabbar',
|
|
mixins: [uni.$u.mpMixin, uni.$u.mixin,props],
|
|
data() {
|
|
return {
|
|
placeholderHeight: 0
|
|
}
|
|
},
|
|
computed: {
|
|
tabbarStyle() {
|
|
const style = {
|
|
zIndex: this.zIndex
|
|
}
|
|
// 合并来自父组件的customStyle样式
|
|
return uni.$u.deepMerge(style, uni.$u.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())
|
|
},
|
|
// 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 uni.$u.sleep(20)
|
|
// #ifndef APP-NVUE
|
|
this.$uGetRect('.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>
|
|
@import "../../libs/css/components.scss";
|
|
|
|
.u-tabbar {
|
|
@include flex(column);
|
|
flex: 1;
|
|
justify-content: center;
|
|
|
|
&__content {
|
|
@include flex(column);
|
|
background-color: #fff;
|
|
|
|
&__item-wrapper {
|
|
height: 50px;
|
|
@include flex(row);
|
|
}
|
|
}
|
|
|
|
&--fixed {
|
|
position: fixed;
|
|
bottom: 0;
|
|
left: 0;
|
|
right: 0;
|
|
}
|
|
}
|
|
</style>
|