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| <template>
| <view class="cl-scroller__wrap">
| <view
| class="cl-scroller__loading"
| :style="{
| transform,
| transition,
| }"
| >
| <slot name="loading" :text="text" :status="status" :move="touch.move">
| <cl-loading :size="35" v-if="status == 'loading'"></cl-loading>
| <cl-text :size="26" :margin="[0, 0, 0, 14]" :value="text"></cl-text>
| </slot>
| </view>
|
| <view
| class="cl-scroller"
| :style="{
| transform,
| transition,
| }"
| @touchmove.stop="onTouchMove"
| @touchstart="onTouchStart"
| @touchend="onTouchEnd"
| >
| <scroll-view
| class="cl-scroller__view"
| scroll-y
| :lower-top="bottom"
| :scroll-top="scrollTop2"
| :scroll-into-view="scrollIntoView"
| :scroll-with-animation="scrollWithAnimation"
| :enable-back-to-top="enableBackToTop"
| :show-scrollbar="showScrollbar"
| :enable-flex="enableFlex"
| @scroll="onScroll"
| @scrolltolower="up"
| >
| <slot></slot>
| </scroll-view>
| </view>
|
| <!-- 回到顶部 -->
| <view
| class="cl-scroller__back-top"
| :class="[
| {
| fadeIn: backTopButtonFadeIn,
| },
| ]"
| @tap="backTop"
| v-if="showBackTopButton"
| >
| <cl-icon name="top" color="#666"></cl-icon>
| <text class="cl-scroller__back-top-text">{{ $t("顶部") }}</text>
| </view>
| </view>
| </template>
|
| <script lang="ts">
| import { computed, defineComponent, getCurrentInstance, reactive, ref, watch } from "vue";
| import { t } from "/@/locale";
|
| export default defineComponent({
| props: {
| // 距离顶部多少px触发
| top: {
| type: Number,
| default: 80,
| },
| // 距离底部多少px触发
| bottom: {
| type: Number,
| default: 100,
| },
| // 正在刷新文案
| loadingText: {
| type: String,
| default: t("正在刷新"),
| },
| // 下拉刷新文案
|
| pullingText: {
| type: String,
| default: t("下拉刷新"),
| },
| // 释放刷新文案
|
| releaseText: {
| type: String,
| default: t("释放刷新"),
| },
| // 滚动条距离顶部位置
| scrollTop: Number,
| // 滚动到对应元素id
| scrollIntoView: String,
|
| // 滚动是否动画
| scrollWithAnimation: {
| type: Boolean,
| default: true,
| },
| // 点击回顶部
| enableBackToTop: Boolean,
| // 是否显示返回顶部按钮
| showBackTopButton: {
| type: Boolean,
| default: true,
| },
| // 是否显示滚动条
| showScrollbar: Boolean,
| // 开启 flex 布局
| enableFlex: Boolean,
| // 开启刷新
| refresherEnabled: {
| type: Boolean,
| default: true,
| },
| },
|
| emits: ["down", "up", "scroll"],
|
| setup(props, { emit }) {
| const { proxy }: any = getCurrentInstance();
|
| // 按下
| const touch = reactive({
| start: 0,
| move: 0,
| });
|
| // 滚动距离
| const scrollTop2 = ref(0);
|
| watch(
| () => props.scrollTop,
| (val) => {
| scrollTop2.value = val || 0;
| },
| {
| immediate: true,
| }
| );
|
| // 回到顶部
| const backTopButtonFadeIn = ref(false);
|
| // 状态
| const status = ref("end");
|
| // 过渡效果
| const transform = computed(() => {
| return touch.move ? `translate3d(0, ${touch.move}px, 0)` : "";
| });
|
| // 动画
| const transition = computed(() => {
| return ["end", "loading"].includes(status.value) ? "transform 0.3s" : "";
| });
|
| // 是否可释放
| const isReleasable = computed(() => touch.move >= props.top);
|
| //文案
| const text = computed(() => {
| switch (status.value) {
| case "pulling":
| return isReleasable.value ? props.releaseText : props.pullingText;
| case "loading":
| return props.loadingText;
| default:
| return props.pullingText;
| }
| });
|
| // 滚动开始
| function onTouchStart(e: TouchEvent) {
| if (status.value == "end" && props.refresherEnabled) {
| touch.start = e.changedTouches[0].clientY;
| status.value = "pulling";
| }
| }
|
| // 滚动中
| function onTouchMove(e: TouchEvent) {
| if (status.value == "pulling" && scrollTop2.value <= 10) {
| let offset = e.changedTouches[0].clientY - touch.start;
|
| if (offset <= 200) {
| touch.move = offset;
| }
| }
| }
|
| // 滚动结束
| function onTouchEnd() {
| if (isReleasable.value) {
| down();
| } else {
| end();
| }
| }
|
| // 滚动监听
| function onScroll(e: any) {
| backTopButtonFadeIn.value = e.detail.scrollTop >= 200;
| emit("scroll", e);
| }
|
| // 下拉刷新
| function down() {
| uni.createSelectorQuery()
| .in(proxy)
| .select(".cl-scroller__loading")
| .fields({ size: true }, (d: any) => {
| status.value = "loading";
| touch.move = d.height || 0;
| emit("down", end);
| })
| .exec();
| }
|
| // 上拉加载
| function up() {
| emit("up");
| }
|
| // 收起，结束
| function end() {
| status.value = "end";
| touch.move = 0;
| }
|
| // 滚动到
| function scrollTo(top: number) {
| scrollTop2.value = top;
| }
|
| // 回到顶部
| function backTop() {
| scrollTop2.value = Math.random();
| }
|
| return {
| touch,
| scrollTop2,
| backTopButtonFadeIn,
| status,
| transform,
| transition,
| isReleasable,
| text,
| onScroll,
| onTouchStart,
| onTouchMove,
| onTouchEnd,
| down,
| up,
| end,
| scrollTo,
| backTop,
| };
| },
| });
| </script>
|
|
