Question

我需要添加过滤器来处理现有应用中的分页

在index.js中我们拥有所有

require('angular') require('angular-ui-notification');

var myapp= angular.module('myapp', [
'ngRoute',
'ui.bootstrap',
'ngSanitize',
'ui.bootstrap'
]);
$http.get('configuration.json').then(function (response) {
var parameters = {};
parameters = response.data;
angular.element(document).ready(function() {
    mainModule
        .controller('SimpleCtrl', require('./controllers/Simple.js'))       
        .provider('runtimeConfig', require('./services/configuration.js'))          
        .config(function ($httpProvider) {
                        $httpProvider.defaults.headers.common["X-Requested-With"] = 'XMLHttpRequest';
        })
        .config(function(runtimeConfigProvider){             
        })            
        .config(function ($routeProvider) {
            $routeProvider
                .when('/', {
                    template: require('../views/myHome.html'),
                    controller: require('./controllers/myHome.js'),
        accessPolicy: { authentication: false, role: "ALL"}
                })              
        })
        })
        })

对于相应的myHome.html，我需要在myHome.js文件中添加分页，

'use strict';
module.exports = function($scope, $filter, $log, $route, $rootScope, $location, uibModal, MyService) {

}

我计划使用以下代码。

var app=angular.module('myApp', []);

function MyCtrl($scope) {
    $scope.currentPage = 0;
    $scope.pageSize = 10;
    $scope.data = [];
    $scope.numberOfPages=function(){
        return Math.ceil($scope.data.length/$scope.pageSize);                
    }
    for (var i=0; i<45; i++) {
        $scope.data.push("Item "+i);
    }
}

//We already have a limitTo filter built-in to angular,
//let's make a startFrom filter
app.filter('startFrom', function() {
    return function(input, start) {
        start = +start; //parse to int
        return input.slice(start);
    }
});

<link href="http://getbootstrap.com/2.3.2/bootstrap.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-controller="MyCtrl">
    <ul>
        <li ng-repeat="item in data | startFrom:currentPage*pageSize | limitTo:pageSize">
            {{item}}
        </li>
    </ul>
    <button ng-disabled="currentPage == 0" ng-click="currentPage=currentPage-1">
        Previous
    </button>
    {{currentPage+1}}/{{numberOfPages()}}
    <button ng-disabled="currentPage >= data.length/pageSize - 1" ng-click="currentPage=currentPage+1">
        Next
    </button>
</div>

但我不知道如何在myHome.js中注入特定的过滤器代码，

app.filter('startFrom', function() {
return function(input, start) {
    start = +start; //parse to int
    return input.slice(start);
}
});

我在index.js中有我的应用程序，需要从myHome.js进行分页。请建议如何将代码用于myHome.js。如果我尝试使用startFrom，

，我将得到以下异常

bundle.annotated.js:29401 Error: [$injector:unpr] Unknown provider: 
startFromFilterProvider <- startFromFilter
http://errors.angularjs.org/1.4.7/$injector/unpr?p0=startFromFilterProvider%20%3C-<div ng-view="" class="ng-scope">tartFromFilter
    at http://localhost:9000/bundle.annotated.js:16992:12
    at http://localhost:9000/bundle.annotated.js:21213:19
    at Object.getService [as get] (http://localhost:9000/bundle.annotated.js:21361:39)
    at http://localhost:9000/bundle.annotated.js:21218:45
    at Object.getService [as get] (http://localhost:9000/bundle.annotated.js:21361:39)
    at http://localhost:9000/bundle.annotated.js:35153:24
    at new module.exports (http://localhost:9000/bundle.annotated.js:550:18)
    at invoke (http://localhost:9000/bundle.annotated.js:21402:17)
    at Object.instantiate (http://localhost:9000/bundle.annotated.js:21410:27)
    at http://localhost:9000/bundle.annotated.js:26075:28

Answer 1

要在控制器中添加为依赖项的过滤器的语法是

filterName+Filter

Eg: testFilter, reverseFilter, startFromFilter

根据我们的离线讨论，您的过滤器可以转到

mainModule 
.filter('startFrom', function() { 
return function(input, start) { 
start = +start; //parse to int 
return input.slice(start); 
} 
})

var app=angular.module('myApp', []);

app.controller('MyCtrl', ['$scope', '$filter', function ($scope, $filter) {
    $scope.currentPage = 0;
    $scope.pageSize = 10;
    $scope.data = [];
    $scope.q = '';
    
    $scope.getData = function () {
      // needed for the pagination calc
      // https://docs.angularjs.org/api/ng/filter/filter
      return $filter('filter')($scope.data, $scope.q)

    }
    
    $scope.numberOfPages=function(){
        return Math.ceil($scope.getData().length/$scope.pageSize);                
    }
    
    for (var i=0; i<45; i++) {
        $scope.data.push("Item "+i);
    }
}]);

//We already have a limitTo filter built-in to angular,
//let's make a startFrom filter
app.filter('startFrom', function() {
    return function(input, start) {
        start = +start; //parse to int
        return input.slice(start);
    }
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.21/angular.min.js"></script>
<div ng-app="myApp" ng-controller="MyCtrl">
    <input ng-model="q" id="search" class="form-control" placeholder="Filter text">
    <select ng-model="pageSize" id="pageSize" class="form-control">
        <option value="5">5</option>
        <option value="10">10</option>
        <option value="15">15</option>
        <option value="20">20</option>
     </select>
    <ul>
        <li ng-repeat="item in data | filter:q | startFrom:currentPage*pageSize | limitTo:pageSize">
            {{item}}
        </li>
    </ul>
    <button ng-disabled="currentPage == 0" ng-click="currentPage=currentPage-1">
        Previous
    </button>
    {{currentPage+1}}/{{numberOfPages()}}
    <button ng-disabled="currentPage >= getData().length/pageSize - 1" ng-click="currentPage=currentPage+1">
        Next
    </button>
</div>

如何在Angular JS中添加自定义过滤器

1 个答案: