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| import { computed, getCurrentInstance, onUnmounted, reactive } from "vue";
| import { onPullDownRefresh, onReachBottom, onUnload } from "@dcloudio/uni-app";
| import { useUi } from "/$/cool-ui";
|
| interface Res {
| list: any[];
| pagination: {
| total: number;
| page: number;
| size: number;
| [key: string]: any;
| };
| [key: string]: any;
| }
|
| export function usePager<T = any>(data: T[] = []) {
| const { proxy }: any = getCurrentInstance();
| const ui = useUi();
|
| // 分页信息
| const pager = reactive({
| params: {},
| pagination: {
| page: 1,
| size: 20,
| total: 0,
| },
| list: data,
| loading: false,
| finished: false,
| });
|
| // 事件
| const events: any = {};
|
| // 列表
| const list = computed(() => pager.list);
|
| // 刷新
| async function refresh(params?: any) {
| if (pager.loading) {
| return false;
| }
|
| if (proxy.refresh) {
| await proxy.refresh(params);
| } else if (proxy.$.exposed.refresh) {
| await proxy.$.exposed.refresh(params);
| } else {
| console.log("use defineExpose({ refresh })");
| }
| }
|
| // 数据
| function onData(cb: (list: T[]) => void) {
| events.onData = cb;
| }
|
| // 刷新
| function onRefresh(params: any = {}, options?: { clear?: boolean; loading?: boolean }) {
| const { clear, loading = true } = options || {};
|
| // 是否清空
| if (clear) {
| if (params.page == 1) {
| pager.list = [];
| pager.finished = false;
| }
| }
|
| // 合并请求参数
| Object.assign(pager.params, params);
|
| const data = {
| ...pager.pagination,
| ...pager.params,
| total: undefined,
| };
|
| // 是否显示加载动画
| if (data.page == 1 && loading) {
| ui.showLoading();
| }
|
| pager.loading = true;
|
| // 完成
| function done() {
| ui.hideLoading();
| pager.loading = false;
| }
|
| return {
| data,
| done,
| next: (req: Promise<Res>) => {
| return new Promise((resolve, reject) => {
| req.then((res: Res) => {
| // 设置列表数据
| if (data.page == 1) {
| pager.list = res.list;
| } else {
| pager.list.push(...res.list);
| }
|
| // 追加事件
| if (events.onData) {
| events.onData(res.list);
| }
|
| // 是否加载完成
| pager.finished = pager.list.length === res.pagination.total;
| // 分页信息
| pager.pagination = res.pagination;
|
| done();
| resolve(res);
| }).catch((err) => {
| done();
| ui.showToast(err.message);
| reject(err);
| });
| });
| },
| };
| }
|
| // 关闭
| function close() {
| isReg = false;
| ui.hideLoading();
| }
|
| // 下拉刷新
| async function onDown(end?: () => void) {
| await refresh({ page: 1 });
| end?.();
| }
|
| // 上拉加载
| function onUp() {
| if (!pager.finished) {
| refresh({ page: pager.pagination.page + 1 });
| }
| }
|
| // 是否注册，避免在组件中重复注入事件问题
| let isReg = true;
|
| // 上拉加载
| onReachBottom(() => {
| if (isReg) {
| onUp();
| }
| });
|
| // 下拉刷新
| onPullDownRefresh(() => {
| if (isReg) {
| onDown(uni.stopPullDownRefresh);
| }
| });
|
| // 组件销毁
| onUnmounted(close);
|
| // 离开页面
| onUnload(close);
|
| return {
| pager,
| list,
| onData,
| onRefresh,
| onPullDownRefresh,
| onReachBottom,
| onDown,
| onUp,
| };
| }
|
|
