增加晶全app静态页面
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166
node_modules/vk-uview-ui/components/u-dropdown-item/u-dropdown-item.vue
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166
node_modules/vk-uview-ui/components/u-dropdown-item/u-dropdown-item.vue
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<template>
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<view
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class="u-dropdown-item"
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v-if="active"
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@touchmove.stop.prevent="() => {}"
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@tap.stop.prevent="() => {}"
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>
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<block v-if="!$slots.default && !$slots.$default">
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<scroll-view
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scroll-y="true"
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:style="{
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height: $u.addUnit(height)
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}"
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>
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<view class="u-dropdown-item__options">
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<u-cell-group>
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<u-cell-item
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@click="cellClick(item.value)"
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:arrow="false"
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:title="item.label"
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v-for="(item, index) in options"
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:key="index"
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:title-style="{
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color: value === item.value ? activeColor : inactiveColor
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}"
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>
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<u-icon
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v-if="valueCom === item.value"
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name="checkbox-mark"
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:color="activeColor"
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size="32"
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></u-icon>
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</u-cell-item>
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</u-cell-group>
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</view>
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</scroll-view>
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</block>
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<slot v-else />
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</view>
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</template>
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<script>
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/**
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* dropdown-item 下拉菜单
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* @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
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* @tutorial https://vkuviewdoc.fsq.pub/components/dropdown.html
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* @property {String | Number} v-model 双向绑定选项卡选择值
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* @property {String} title 菜单项标题
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* @property {Array[Object]} options 选项数据,如果传入了默认slot,此参数无效
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* @property {Boolean} disabled 是否禁用此选项卡(默认false)
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* @property {String | Number} duration 选项卡展开和收起的过渡时间,单位ms(默认300)
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* @property {String | Number} height 弹窗下拉内容的高度(内容超出将会滚动)(默认auto)
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* @example <u-dropdown-item title="标题"></u-dropdown-item>
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*/
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export default {
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name: "u-dropdown-item",
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emits: ["update:modelValue", "input", "change"],
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props: {
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// 当前选中项的value值
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value: {
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type: [Number, String, Array],
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default: ""
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},
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modelValue: {
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type: [Number, String, Array],
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default: ""
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},
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// 菜单项标题
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title: {
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type: [String, Number],
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default: ""
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},
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// 选项数据,如果传入了默认slot,此参数无效
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options: {
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type: Array,
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default() {
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return [];
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}
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},
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// 是否禁用此菜单项
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disabled: {
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type: Boolean,
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default: false
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},
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// 下拉弹窗的高度
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height: {
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type: [Number, String],
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default: "auto"
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}
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},
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data() {
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return {
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active: false, // 当前项是否处于展开状态
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activeColor: "#2979ff", // 激活时左边文字和右边对勾图标的颜色
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inactiveColor: "#606266" // 未激活时左边文字和右边对勾图标的颜色
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};
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},
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computed: {
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valueCom() {
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// #ifndef VUE3
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return this.value;
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// #endif
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// #ifdef VUE3
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return this.modelValue;
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// #endif
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},
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// 监听props是否发生了变化,有些值需要传递给父组件u-dropdown,无法双向绑定
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propsChange() {
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return `${this.title}-${this.disabled}`;
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}
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},
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watch: {
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propsChange(n) {
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// 当值变化时,通知父组件重新初始化,让父组件执行每个子组件的init()方法
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// 将所有子组件数据重新整理一遍
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if (this.parent) this.parent.init();
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}
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},
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created() {
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// 父组件的实例
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this.parent = false;
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},
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methods: {
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init() {
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// 获取父组件u-dropdown
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let parent = this.$u.$parent.call(this, "u-dropdown");
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if (parent) {
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this.parent = parent;
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// 将子组件的激活颜色配置为父组件设置的激活和未激活时的颜色
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this.activeColor = parent.activeColor;
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this.inactiveColor = parent.inactiveColor;
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// 将本组件的this,放入到父组件的children数组中,让父组件可以操作本(子)组件的方法和属性
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// push进去前,显判断是否已经存在了本实例,因为在子组件内部数据变化时,会通过父组件重新初始化子组件
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let exist = parent.children.find(val => {
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return this === val;
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});
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if (!exist) parent.children.push(this);
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if (parent.children.length == 1) this.active = true;
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// 父组件无法监听children的变化,故将子组件的title,传入父组件的menuList数组中
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parent.menuList.push({
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title: this.title,
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disabled: this.disabled
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});
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}
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},
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// cell被点击
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cellClick(value) {
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// 修改通过v-model绑定的值
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this.$emit("input", value);
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this.$emit("update:modelValue", value);
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// 通知父组件(u-dropdown)收起菜单
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this.parent.close();
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// 发出事件,抛出当前勾选项的value
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this.$emit("change", value);
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}
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},
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mounted() {
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this.init();
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}
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};
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</script>
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<style scoped lang="scss">
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@import "../../libs/css/style.components.scss";
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</style>
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