便利贴--47{基于移动端长页中分页加载逻辑封装}

使用

this.pages = new Pagination({
      method: inspectionList,//主要的promis的接口方法
      value: this.ourData.tabel.value,//如果传入的是在对象中，可以直接更改你的列表数据（可查看对象引用知识）
       search: { propertyType: 2 },//默认搜索条件
       mustSearch: ["checkState"],//必须要设置的搜索条件，若传入的搜索条件为空，则不请求数据
      whereList: ["rows"],//在得到的res对象中，我们需要的数组列表在哪个子对象上，主要是for循环进行读取res内部数据
      pageName: "pageNum",//自定义page传参名称
      outTotal: (num) => {//数量的输出，主要用于判断没有数据时候显示缺省页
        console.log(num);
        // ourData.total = num;
      },
      fn: (res, reset) => {//在不使用对象引用时，可以在这里进行获取的数据输出，但注意每次输出是基于当前搜索条件的结果，需要push
    doData(res, reset);
  },
    });
    this.pages.onSearch();//进行搜索

scrollBottom(e) {// 监听的滚动事件，如果是uniapp 有自带的滚动到底部事件，可直接使用this.pages.next();，pagination中已经集成每次请求完才能进行下一次请求
      let bottomPosition = e.target.scrollHeight - e.target.clientHeight,
        nowPosition = e.target.scrollTop,
        gap = bottomPosition - e.target.scrollTop;
      if (gap <= 100) {
        // console.log(gap);
        // console.log(this.pages.onMove);
        if (!this.pages.onMove) {//这个是内部展示是否是在请求状态 true为请求状态
          // setTimeout(() => {
          this.pages.next();
          // }, 1000);
        }
      }
    },

源代码

export default class pagination {
	constructor(arg) {
		this.method = arg?.method || '';
		this.search = arg?.search || {};
		this.otherSearch = arg?.otherSearch || {};
		this.pageName = arg?.pageName || 'page'
		this.pageSizeName = arg?.pageSizeName || 'pageSize'
		this.page = arg?.page || {
			current: 1,
			pageSize: 10,
			total: 0,
			state: false,
			stop: false
		};
		this.value = arg.value || [];
		this.mustSearch = arg.mustSearch || [];
		this.listName = arg.listName || '';
		//抛出方法
		this.fn = arg.fn || '';
		this.outTotal = arg.outTotal || function (r) {
			console.log(r, 'total输出')
		}
		// 信息获取状态
		this.onMove = false;
		// this.getData()
		//深度自定义数据的位置，基于在res.list中
		this.whereList = arg.whereList || [];
	}
	async getData(reset) {
		// console.log(form.page);
		if (this.onMove) {
			console.log('操作频繁，请稍后重试！')
			return
		}
		if (this.page.stop) return;
		let data = {};
		data[this.pageName] = this.page.current;
		data[this.pageSizeName] = this.page.pageSize;
		if (Object.keys(this.search).length != 0) {
			for (let k in this.search) {
				data[k] = this.search[k];
			}
		}
		if (Object.keys(this.otherSearch).length != 0) {
			for (let k in this.otherSearch) {
				data[k] = this.otherSearch[k];
			}
		}
		// console.log(this.method,'see')
		// this.method &&
		// 	console.log(data, '传参see', (this.method + '').match(/\"\/(\S*)\"\,/)[0], (this.method + '').match(
		// 		/method: (\S*)\"\,/)[0]);
		if (!this.method) {
			console.log('未设置api')
			return
		}
		console.log(data, '传参see')
		// return
		this.onMove = true
		let res = await this.method(data);
		this.onMove = false
		console.log(res, '返回see');

		// 抛出处理数据
		if (this.fn) {
			this.fn(res, reset)
		}
		let useList = res;
		if (this.whereList.length > 0) {
			for (let k in this.whereList) {
				useList = useList[this.whereList[k]]
			}
		}

		if (!useList || !res?.total) {
			// 抛出数量
			this.outTotal(0)
			return
		};

		this.outTotal(res?.total)
		this.value.push(...useList);
		this.page.total = res?.total;

		// this.value.push(useList[0]);
		// this.outTotal(0)

		//判断是否还有分页
		// console.log(this.value, 'see5');
		if (this.value.length < this.page.total) {
			this.page.state = true;
			this.page.stop = false;
			this.page.current++;
		} else {
			this.page.state = true;
			this.page.stop = true;
		}

	}
	//查询数据
	next() {
		this.getData();
	};
	//查询数据
	onSearch(data, other = {
		reset: true
	}) {
		if (other.reset) {
			this.onReset();
		}
		let must = this.mustSearch;
		for (let k in data) {
			if (must.includes(k)) {
				this.search[k] = data[k]
			} else {
				this.otherSearch[k] = data[k];
			}
		}
		//判断是否含有必要条件
		if (!this.passSearch()) {
			// console.log('有必要条件未传！')
			return
		};
		this.getData(other.reset);
	};
	//重置数据
	onReset() {
		if (this.value.length > 0) {
			this.value.splice(0, this.value.length);
		}
		// //清空不必要搜索
		// if (Object.keys(this.otherSearch).length != 0) {
		// 	this.otherSearch = {}
		// }
		this.page = {
			current: 1,
			pageSize: 10,
			total: 0,
			state: false,
			stop: false
		};
		this.onMove = false;
	};
	//判断是否含有必要条件
	passSearch() {
		// 取出搜索必要条件
		let must = this.mustSearch,
			i = 0;
		for (let k in this.search) {
			if (must.includes(k)) {
				i++;
			}
		}
		if (i == must.length) {
			// console.log('符合');
			return true
		} else {
			// console.log('不符合');
			return false
		}
	};
	setMethod(method, search) {
		this.method = method || "";
		search &&
			this.onSearch()
	}
	setMustSearch(mustSearch) {
		this.mustSearch = mustSearch || "";
	}
}