2024-12-18 15:46:27 +08:00
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<template>
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2025-02-12 09:05:14 +08:00
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<view class="tab">
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<scroll-view class="scroll" scroll-x scroll-with-animation :show-scrollbar="false" :scroll-left="scrollLeft">
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<view class="list" :class="scroll ? '' : 'flex-row-left'" id="tab">
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<view class="item fmid ptb10 plr20" :class="{'active': index === currentIndex}" :id="'tab-item-' + index"
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v-for="(item, index) in list" :key="index" @click="handleTabClick(item, index)">
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{{ item[titalName] }}
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</view>
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</view>
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</scroll-view>
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</view>
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2024-12-18 15:46:27 +08:00
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</template>
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<script>
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2025-02-12 09:05:14 +08:00
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export default {
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props: {
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list: {
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type: Array,
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default: () => []
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},
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titalName: {
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type: String,
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default: 'name'
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},
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// 是否滚动,默认是,否则是不滚动,按个数等分宽度
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scroll: {
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type: Boolean,
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default: true
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},
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// 支持双向绑定的 prop
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modelValue: {
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type: [Number,String],
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default: 0
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}
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},
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computed: {
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currentIndex: {
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get() {
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return this.modelValue;
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},
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set(newValue) {
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this.$emit('update:modelValue', newValue);
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}
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}
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},
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data() {
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return {
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scrollLeft: 0,
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componentWidth: 0, // tabs组件宽度,单位为px
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parentLeft: 0, // 父元素(tabs组件)到屏幕左边的距离
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scrollBarLeft: 0, // 移动bar需要通过translateX()移动的距离
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tabItemRectInfo: [],
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barFirstTimeMove: true
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};
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},
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watch: {
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list: {
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deep: true,
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handler(newList, oldList) {
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if (newList.length !== oldList.length) {
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this.currentIndex = 0;
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}
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this.$nextTick(() => {
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this.initialize();
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});
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}
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},
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},
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mounted() {
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this.initialize();
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},
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methods: {
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initialize() {
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this.getComponentRect();
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this.getTabItemRect();
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},
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getComponentRect() {
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uni.createSelectorQuery().in(this).select('#tab').fields({
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size: true,
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rect: true
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}, (data) => {
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if (data) {
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this.parentLeft = data.left;
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this.componentWidth = data.width;
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}
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}).exec();
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},
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getTabItemRect() {
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const query = uni.createSelectorQuery().in(this);
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this.list.forEach((_, index) => {
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query.select(`#tab-item-${index}`).fields({
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size: true,
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rect: true
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});
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});
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query.exec((data) => {
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if (data) {
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this.tabItemRectInfo = data;
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this.scrollToActiveTab();
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}
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});
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},
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scrollToActiveTab() {
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const tabInfo = this.tabItemRectInfo[this.currentIndex];
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if (!tabInfo) return;
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const tabWidth = tabInfo.width;
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const offsetLeft = tabInfo.left - this.parentLeft;
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let scrollLeft = offsetLeft - (this.componentWidth - tabWidth) / 2;
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this.scrollLeft = Math.max(0, scrollLeft);
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const left = tabInfo.left + tabWidth / 2 - this.parentLeft;
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this.scrollBarLeft = left - this.barWidth / 2;
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if (this.barFirstTimeMove) {
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setTimeout(() => {
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this.barFirstTimeMove = false;
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}, 100);
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}
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},
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handleTabClick(item, index) {
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if (index === this.currentIndex) return;
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this.currentIndex = index;
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this.$emit('tabItemClick', item, index);
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this.scrollToActiveTab();
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}
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}
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};
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2024-12-18 15:46:27 +08:00
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</script>
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<style lang="scss" scoped>
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2025-02-12 09:05:14 +08:00
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.tab {
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position: sticky;
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top: 88rpx;
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left: 0;
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width: 100%;
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z-index: 9;
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}
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2024-12-18 15:46:27 +08:00
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2025-02-12 09:05:14 +08:00
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.scroll {
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box-sizing: border-box;
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height: 100%;
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position: relative;
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white-space: nowrap;
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width: 100%;
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2024-12-18 15:46:27 +08:00
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2025-02-12 09:05:14 +08:00
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.list {
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position: relative;
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width: 100%;
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white-space: nowrap;
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}
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2024-12-18 15:46:27 +08:00
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2025-02-12 09:05:14 +08:00
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.item {
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position: relative;
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display: inline-block;
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color: #8C8C8C;
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2024-12-18 15:46:27 +08:00
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2025-02-12 09:05:14 +08:00
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&.active {
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color: #333;
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font-weight: bold;
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transform: scale(1.1);
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}
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}
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}
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2024-12-18 15:46:27 +08:00
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2025-02-12 09:05:14 +08:00
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// 隐藏滚动条
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::-webkit-scrollbar {
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display: none;
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width: 0 !important;
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height: 0 !important;
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-webkit-appearance: none;
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background: transparent;
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}
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2024-12-18 15:46:27 +08:00
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</style>
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