u-select.vue
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<template>
<view class="u-select">
<view class="u-select__content">
<view class="u-select__label" @click="openSelect">
<slot name="text" :currentLabel="currentLabel">
<text class="u-select__text" v-if="showOptionsLabel">
{{ currentLabel }}
</text>
<text class="u-select__text" v-else>
{{ label }}
</text>
</slot>
<slot name="icon">
<up-icon name="arrow-down" :size="iconSize" :color="iconColor"></up-icon>
</slot>
</view>
<u-overlay
:show="isOpen"
@click="overlayClick"
v-if="overlay"
:zIndex="zIndex"
:duration="duration + 50"
:customStyle="overlayStyle"
:opacity="overlayOpacity"
@touchmove.stop.prevent="noop"
></u-overlay>
<view class="u-select__options__wrap"
:style="{ overflowY: 'auto', zIndex: zIndex + 1, left: optionsWrapLeft, right: optionsWrapRight, maxHeight: maxHeight}">
<view class="u-select__options" v-if="isOpen">
<slot name="options">
<view class="u-select__options_item"
:class="current == item[keyName] ? 'active': ''"
:key="index" v-for="(item, index) in options"
@click="selectItem(item)">
<slot name="optionItem" :item="item">
<text class="u-select__item_text" :style="{color: itemColor}">
{{item[labelName]}}
</text>
</slot>
</view>
</slot>
</view>
</view>
</view>
</view>
</template>
<script>
import { getWindowInfo } from '../../libs/function/index';
export default {
name:"up-select",
emits: ['update:current', 'select'],
props: {
maxHeight: {
type: String,
default: '90vh'
},
overlay: {
type: Boolean,
default: true
},
overlayOpacity: {
type: Number,
default: 0.01
},
overlayStyle: {
type: Object,
default: () => {
return {}
}
},
duration: {
type: Number,
default: 300
},
label: {
type: String,
default: '选项'
},
options: {
type: Array,
default: () => {
return []
}
},
keyName: {
type: String,
default: 'id'
},
labelName: {
type: String,
default: 'name'
},
showOptionsLabel: {
type: Boolean,
default: false
},
current: {
type: [String, Number],
default: ''
},
zIndex: {
type: Number,
default: 11000
},
itemColor: {
type: String,
default: '#333333'
},
iconColor: {
type: String,
default: ''
},
iconSize: {
type: [String],
default: '13px'
}
},
data() {
return {
isOpen: false,
optionsWrapLeft: 'auto',
optionsWrapRight: 'auto'
}
},
computed: {
currentLabel() {
let name = '';
this.options.forEach((ele) => {
if (ele[this.keyName] === this.current) {
name = ele[this.labelName];
}
});
return name;
}
},
methods: {
openSelect() {
this.isOpen = true;
this.$nextTick(() => {
if (this.isOpen) {
this.adjustOptionsWrapPosition();
}
});
},
overlayClick() {
this.isOpen = false;
},
selectItem(item) {
this.isOpen = false;
this.$emit('update:current', item[this.keyName]);
this.$emit('select', item);
},
adjustOptionsWrapPosition() {
let wi = getWindowInfo();
let windowWidth = wi.windowWidth;
this.$uGetRect('.u-select__options__wrap').then(rect => {
console.log(rect)
if (rect.left + rect.width > windowWidth) {
// 如果右侧被遮挡，则调整到左侧
this.optionsWrapLeft = 'auto';
this.optionsWrapRight = `0px`;
}
});
}
}
}
</script>
<style lang="scss" scoped>
.u-select__content {
position: relative;
.u-select__label {
display: flex;
justify-content: space-between;
/* #ifdef H5 */
&:hover {
cursor: pointer;
}
/* #endif */
}
.u-select__text {
margin-right: 2px;
}
.u-select__options__wrap {
margin-bottom: 46px;
position: absolute;
top: 20px;
left: 0;
}
.u-select__options {
min-width: 100px;
box-sizing: border-box;
border-radius: 4px;
border: 1px solid #f1f1f1;
background-color: #fff;
.u-select__options_item {
padding: 10px 12px;
box-sizing: border-box;
width: 100%;
height: 100%;
&:hover {
background-color: #f7f7f7;
}
/* #ifdef H5 */
&:hover {
cursor: pointer;
}
.u-select__item_text {
&:hover {
cursor: pointer;
}
}
/* #endif */
}
}
}
</style>