学习Angularjs分页指令
编程学习 2021-07-04 19:59www.dzhlxh.cn编程入门
这篇文章主要和大家一起学习Angularjs分页指令，代码很详细，文章结构紧凑，感兴趣的小伙伴们可以参考一下
在项目中许多页面都用到了分页，然后每个页面都有许多重复的分页代码，于是自己写了一份简易的分页指令，简化页面的代码，且容易维护，写在博客中当做备份，方便以后查阅。
以下是定义指令及其应用的步骤：
1.指令定义
定义一个js文件，page-directive.js，用来写分页的指令代码，这个文件中包含了分页的模板，以下是js文件中的所有代码：
'use strict';
(function () {
angular.module('template/pageInit/pageInit.html', []).run([
'$templateCache',function($templateCache) {
$templateCache.put('template/pageInit/pageInit.html',
'<ul class="pagination-main">\n'+
' <li class="prev-page" ng-class="{disabled:pageData.currentPage==1}" title="首页">\n'+
' <a href="javascript:void(0);" ng-click="on_loadPage(1)"><span class="fa fa-fast-backward"></span></a>\n'+
' </li>\n'+
' <li class="prev-page" ng-class="{disabled:pageData.currentPage==1 }">\n'+
' <a href="javascript:void(0);" ng-click="on_prev()" title="上一页"><span class="fa fa-step-backward"></span></a>\n'+
' </li>\n'+
' <li class="data-page" ng-repeat="page in pageData.pages" ng-class="{\'first-page\': page==1, \'last-page\': page==pageData.totalPage}">\n'+
' <a ng-if="page!=\'...\'" href="javascript:void(0);" ng-class="{\'bg-custom\': page==pageData.currentPage}" ng-click="on_loadPage(page, tabData)">{{ page }}</a>\n'+
' <a ng-if="page==\'...\'" href="javascript:void(0);" ng-class="{\'bg-custom\': page==pageData.currentPage}" ng-click="">{{ page }}</a>\n'+
' </li>\n'+
' <li class="next-page" ng-class="{disabled:pageData.currentPage==pageData.totalPage}">\n'+
' <a href="javascript:void(0);" ng-click="on_next()" title="下一页"><span class="fa fa-step-forward"></span></a>\n'+
' </li>\n'+
' <li class="skip-page"><div><input type="text" placeholder="" ng-model="inpage">\n'+
' <input type="button" value="跳转" ng-click="on_loadPage(inpage)"></div>\n'+
' </li>\n'+
' <li class="data-num"><a class="cursor-text" href="#"><span>共{{pageData.count}}条</span></a></li>\n'+
'</ul>\n'+
''
);
}
]);
angular.module('pageInit', ['template/pageInit/pageInit.html'])
.directive('pageInit',['pageinitTemplate', function(pageinitTemplate) {
return {
restrict : 'AE',
templateUrl: function (tElement, tAttrs) {
return tAttrs.templateUrl || pageinitTemplate.getPath();
},
replace : true,
scope : {
pageData : '=',
prev : '&',
next : '&',
loadPage : '&'
},
link : function(scope, element, attrs) {
scope.on_prev = function() {
if(scope.prev) {
scope.prev();
}
};
scope.on_next = function() {
if(scope.next) {
scope.next();
}
};
scope.on_loadPage = function(page) {
scope.inpage = undefined;
if(scope.loadPage) {
scope.loadPage({page: page});
}
};
}
};
}])
.provider('pageinitTemplate', function () {
var templatePath = 'template/pageInit/pageInit.html';
this.setPath = function (path) {
templatePath = path;
};
this.$get = function () {
return {
getPath: function () {
return templatePath;
}
};
};
});
}).call(window);
2.分页样式控制
建议写在单独的.css文件中，首先新建pageSync.css文件，以下是具体样式
.pagination-main {
display: inline-block;
padding-left: 0;
margin: 0 0;
border-radius: 4px;
vertical-align: middle;
}
.pagination-main li.prev-page > a {
border: 0;
}
.pagination-main li.next-page > a {
border: 0;
border-left: 1px;
margin-left: 0;
}
.pagination-main li.first-page > a {
border-top-left-radius: 0;
border-bottom-left-radius: 0;
}
.pagination-main li.last-page > a {
border-top-right-radius: 0;
border-bottom-right-radius: 0;
}
.pagination-main li div {
width: 80px;border: 1px solid #DDDDDD;background-color: #ffffff;float: left;padding: 0;
}
.pagination-main li.skip-page input[type='text'] {
width: 24px;height: 20px;border: 0;text-align: center;
}
.pagination-main li.skip-page input[type='button'] {
padding: 0 4px 1px 10px;border: 0;border-left: 1px solid #dddddd;background-color: #ffffff
}
.pagination-main li.data-num > a {
border: 0;
margin-left: 0;
}
.pagination-main > li {
display: inline;
}
.pagination-main > li:first-child > a,
.pagination-main > li:first-child > span {
/*margin-left: 0;
border-top-left-radius: 4px;
border-bottom-left-radius: 4px;*/
}
.pagination-main > .active > a,
.pagination-main > .active > span,
.pagination-main > .active > a:hover,
.pagination-main > .active > span:hover,
.pagination-main > .active > a:focus,
.pagination-main > .active > span:focus {
z-index: 2;
color: #fff;
cursor: default;
background-color: #428bca;
border-color: #428bca;
}
.pagination-main > li > a,
.pagination-main > li > span {
position: relative;
float: left;
/*padding: 6px 12px;*/
padding: 1px 8px;
margin-left: -1px;
line-height: 1.42857143;
color: #428bca;
text-decoration: none;
background-color: #fff;
border: 1px solid #ddd;
}
.pagination-main > .disabled > span,
.pagination-main > .disabled > span:hover,
.pagination-main > .disabled > span:focus,
.pagination-main > .disabled > a,
.pagination-main > .disabled > a:hover,
.pagination-main > .disabled > a:focus {
color: #999;
cursor: not-allowed;
background-color: #fff;
border-color: #ddd;
}
3.分页查询方法
我在factory中自定义了分页查询的方法，共用，方便代码的维护。在angular中与后台的交互默认是异步的，我这里写成同步查询了，首先定义js文件pageSync.service.js，以下是factory的全部内容：
'use strict';
angular.module('app').factory('PageSync', ['$http', '$q', function Page($http, $q) {
var rowCollectionPage = [];
var totalPage = 1;
var pages = [];
var endPage = 1;
var load = function(url, currentPage, pageSize,deferred) {
var json = {rowCollectionPage: [], totalPage: 1, currentPage:currentPage ? currentPage:1, pages: []};
$http.get(url).success(function(rows) {
rowCollectionPage = setPageRow(rows.list, pageSize);
// 获取总页数
totalPage = Math.ceil(rows.count / pageSize);
endPage = totalPage;
// 生成数字链接
if (totalPage <= 7) {
pages = getPagesLow(totalPage);
} else {
pages = getPagesHigh(currentPage, totalPage);
}
json.rowCollectionPage = rowCollectionPage;
json.totalPage = totalPage==0 ? 1 : totalPage;
json.currentPage = currentPage;
json.pages = pages;
json.count = rows.count;
json.pageSize = pageSize;
/**
* 自定义字段，初始化的时候为before，只要经过该分页方法，则字段值变为after
* before表示未经过该分页方法，after表示经过该分页方法，
* 前台页面加载的规则：为before时表示表格无数据，为after且pataData.count==0时无数据，否则视为有数据，
* 也可以说是记录的一个时间状态（访问数据前及返回数据后）
*/
json.loadTime = 'after';
deferred.resolve(json);
});
return deferred.promise;
};
// 总页数小于等于7时 显示所有的页数
var getPagesLow = function(totalPage) {
var temp = [];
for (var i=1; i<totalPage+1; i++) {
temp.push(i);
}
return temp;
};
// 总页数大于7时 根据当前页获取7个页码数
var getPagesHigh = function(currentPage, totalPage) {
var temp = [];
if (currentPage < 4) {
temp = [1, 2, 3, 4, 5, '...', totalPage];
} else if ((totalPage - currentPage) <= 3) {
temp = [
totalPage - 6, totalPage - 5, totalPage - 4,
totalPage - 3, totalPage - 2, totalPage - 1, totalPage
];
} else {
temp = [
currentPage - 2, currentPage - 1, currentPage,
currentPage + 1, currentPage + 2, '...', totalPage
];
}
return temp;
};
// 项目中table的高度是根据浏览器窗口的高度计算的来的，是动态的
// 因为要把分页固定在table最下方，所以无数据的用空行进行代替
var setPageRow = function(rowArr, pageSize) {
var temp = [];
if (rowArr != undefined) {
for (var i = 0; i < rowArr.length; i++) {
temp.push(rowArr[i]);
}
for (var j = 0; j < pageSize - rowArr.length; j++) {
temp.push({});
}
} else {
for (var k = 0; k < pageSize; k++) {
temp.push({});
}
}
return temp;
};
return {
load: function(url, currentPage, pageSize) {
var deferred = $q.defer();
url += '&' + currentPage + '&' + pageSize;
return load(url, currentPage, pageSize, deferred);
},
next: function(url, currentPage, pageSize) {
var deferred = $q.defer();
if (currentPage < endPage) {
currentPage++;
}
url += '&' + currentPage + '&' + pageSize;
return load(url, currentPage, pageSize, deferred);
},
prev: function(url, currentPage, pageSize) {
var deferred = $q.defer();
currentPage--;
url += '&' + currentPage + '&' + pageSize;
return load(url, currentPage, pageSize, deferred);
},
loadPage: function(url, currentPage, pageSize, page) {
var deferred = $q.defer();
if (currentPage != page) {
currentPage = page;
url += '&' + currentPage + '&' + pageSize;
return load(url, currentPage, pageSize, deferred);
}
}
}
}]);
4.使用指令
1）.页面上的代码：
我的代码中分页是写在table中的tfoot里面了，prev()、next()、loadPage(page)均为在页面对应的controller中定义的方法
<table>
<thead>
<tr>
<th>序号</th>
<th>列名1</th>
<th>列名2</th>
<th style="width: 150px;text-align: center;">操作</th>
</tr>
</thead>
<tbody>
<tr ng-if="!noTableData" ng-repeat="row in pageData.rowCollectionPage">
<td>{{!!row.id ? $index+1+(pageData.currentPage-1)*pageSize : ''}}</td>
<td>{{row.args1}}</td>
<td>{{row.args2}}</td>
<td style="text-align: center;"><a href='#'>修改</a></td>
</tr>
<tr ng-if="noTableData" ng-repeat="data in pageData.rowCollectionPage">
<td ng-if="$index == 0" colspan="4" style="text-align: center;">没有数据！</td>
<td ng-if="$index != 0" colspan="4"></td>
</tr>
</tbody>
<tfoot>
<tr>
<td style="text-align: center;" colspan="6">
<div>
<page-init page-data="pageData" prev="prev()" next="next()" load-page="loadPage(page)"></page-init>
</div>
</td>
</tr>
</tfoot>
</table>
2）.controller中的代码
首先要引用factory，将PageSync在controller中引用，如下：
angular.module('app').controller('MyCtrl', function(PageSync) {});
在分页查询之前要做一些准备工作：
//pageData中设置分页数据集合、总页数、页码集合、数据总数，loadTime为自定义的参数，用来记录时间状态（访问数据前及返回数据后）
$scope.pageData = {rowCollectionPage: [], totalPage: 1, currentPage:1, pages: [],count: 0, loadTime: 'before'};
// 这里用来计算table的高度，根据实际情况来。
$scope.tabHeight = $scope.height-48-37-10-42-5;
// 计算实际中一页有多少行数据
$scope.pageSize = parseInt(($scope.tabHeight-15-34-34-39)/34);
然后再controller中写如下的方法
// 分页查询
$scope.load = function(row) {
$scope.surgeonPageData.rowCollectionPage = Common.setPageRow([],$scope.pageSize);
$scope.noSurgeonData = false;
$scope.surgeonPageData.loadTime = 'before';
PageSync.load(url, $scope.pageData.currentPage, $scope.pageSize).then(function(data) {
$scope.pageData = data;
if(($scope.pageData.loadTime=='after'&& $scope.pageData.count==0) || $scope.pageData.loadTime=='before') {
$scope.noTableData = true;
}
});
};
// 下一页
$scope.next = function() {
if ($scope.pageData.currentPage < $scope.pageData.totalPage) {
PageSync.next(url, $scope.pageData.currentPage, $scope.pageSize).then(function(data) {
$scope.pageData = data;
});
}
};
// 上一页
$scope.prev = function() {
if ($scope.pageData.currentPage > 1) {
PageSync.prev(url, $scope.pageData.currentPage, $scope.pageSize).then(function (data) {
$scope.pageData = data;
});
}
};
// 点击页码跳转
$scope.loadPage = function(page) {
$scope.inpage = undefined;
var intPage;
if (typeof page == 'string') {
if(page!="") {
intPage = parseInt(page, 10);
} else {
intPage = 0;
}
} else {
intPage = page;
}
if ($scope.pageData.totalPage <= 1) {
} else if (intPage == undefined || intPage == null) {
alert('请填写跳转页码！');
} else if(intPage <= 0 || intPage > $scope.pageData.totalPage) {
alert('跳转页码应大于0,小于总页数'+$scope.pageData.totalPage);
} else if ($scope.pageData.currentPage != page) {
PageSync.loadPage(url, $scope.pageData.currentPage, $scope.pageSize, page).then(function (data) {
$scope.pageData = data;
});
}
};
5.结果
最终的实现效果如下图：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持狼蚁SEO。