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学习Angularjs分页指令

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

<div class="jb51code">
<pre class="brush:js;">
'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">\n'+
' \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">\n'+
' \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 }}\n'+
' <a ng-if="page==\'...\'" href="javascript:void(0);" ng-class="{\'bg-custom\': page==pageData.currentPage}" ng-click="">{{ page }}\n'+
' \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">\n'+
' \n'+
' <li class="skip-page">

<input type="text" placeholder="" ng-model="inpage">\n'+
' <input type="button" value="跳转" ng-click="on_loadPage(inpage)">
\n'+
' \n'+
' <li class="data-num"><a class="cursor-text" href="#">共{{pageData.count}}条\n'+
'\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

<div class="jb51code">
<pre class="brush:css;">
.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中自定义分页查询方法,共用,方便代码的维护。在angular中与后台的交互认是异步的,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

<div class="jb51code">
<pre class="brush:js;">
'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
    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 + 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,pageSize) {
    var deferred = $q.defer();
    url += '&' + currentPage + '&' + pageSize;
    return load(url,deferred);
    },next: function(url,pageSize) {
    var deferred = $q.defer();
    if (currentPage < endPage) {
    currentPage++;
    }
    url += '&' + currentPage + '&' + pageSize;
    return load(url,prev: function(url,pageSize) {
    var deferred = $q.defer();
    currentPage--;
    url += '&' + currentPage + '&' + pageSize;
    return load(url,loadPage: function(url,page) {
    var deferred = $q.defer();
    if (currentPage != page) {
    currentPage = page;
    url += '&' + currentPage + '&' + pageSize;
    return load(url,deferred);
    }
    }
    }
    }]);

4.使用指令

1).页面上的代码

我的代码分页是写在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

<div class="jb51code">
<pre class="brush:xhtml;">
<table>

序号 列名1 列名2 修改

2).controller中的代码

首先要引用factory,将PageSync在controller中引用,如下:

分页查询之前要做一些准备工作:

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: [],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

<div class="jb51code">
<pre class="brush:js;">
// 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.pageSize).then(function(data) {
$scope.pageData = data;
});
}
};
// 上一页
$scope.prev = function() {
if ($scope.pageData.currentPage > 1) {
PageSync.prev(url,$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.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编程之家。

原文地址:https://www.jb51.cc/js/47486.html

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