我有一些复选框:

<input type='checkbox' value="apple" checked>
<input type='checkbox' value="orange">
<input type='checkbox' value="pear" checked>
<input type='checkbox' value="naartjie">

我想绑定到我的控制器中的一个列表,这样每当一个复选框被更改时,控制器就会维护一个包含所有选中值的列表,例如,['apple', 'pear']。

Ng-model似乎只能将一个复选框的值绑定到控制器中的一个变量。

是否有其他方法可以将这四个复选框绑定到控制器中的列表?


当前回答

灵感来自Yoshi上面的帖子。 这是钱。

(function () { angular .module("APP", []) .controller("demoCtrl", ["$scope", function ($scope) { var dc = this dc.list = [ "Selection1", "Selection2", "Selection3" ] dc.multipleSelections = [] dc.individualSelections = [] // Using splice and push methods to make use of // the same "selections" object passed by reference to the // addOrRemove function as using "selections = []" // creates a new object within the scope of the // function which doesn't help in two way binding. dc.addOrRemove = function (selectedItems, item, isMultiple) { var itemIndex = selectedItems.indexOf(item) var isPresent = (itemIndex > -1) if (isMultiple) { if (isPresent) { selectedItems.splice(itemIndex, 1) } else { selectedItems.push(item) } } else { if (isPresent) { selectedItems.splice(0, 1) } else { selectedItems.splice(0, 1, item) } } } }]) })() label { display: block; } <!DOCTYPE html> <html> <head> <link rel="stylesheet" href="style.css" /> </head> <body ng-app="APP" ng-controller="demoCtrl as dc"> <h1>checkbox-select demo</h1> <h4>Multiple Selections</h4> <label ng-repeat="thing in dc.list"> <input type="checkbox" ng-checked="dc.multipleSelections.indexOf(thing) > -1" ng-click="dc.addOrRemove(dc.multipleSelections, thing, true)" > {{thing}} </label> <p> dc.multipleSelections :- {{dc.multipleSelections}} </p> <hr> <h4>Individual Selections</h4> <label ng-repeat="thing in dc.list"> <input type="checkbox" ng-checked="dc.individualSelections.indexOf(thing) > -1" ng-click="dc.addOrRemove(dc.individualSelections, thing, false)" > {{thing}} </label> <p> dc.invidualSelections :- {{dc.individualSelections}} </p> <script data-require="jquery@3.0.0" data-semver="3.0.0" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.js"></script> <script data-require="angular.js@1.5.6" data-semver="1.5.6" src="https://code.angularjs.org/1.5.6/angular.min.js"></script> <script src="script.js"></script> </body> </html>

其他回答

<input type='checkbox' ng-repeat="fruit in fruits"
  ng-checked="checkedFruits.indexOf(fruit) != -1" ng-click="toggleCheck(fruit)">

.

function SomeCtrl ($scope) {
    $scope.fruits = ["apple, orange, pear, naartjie"];
    $scope.checkedFruits = [];
    $scope.toggleCheck = function (fruit) {
        if ($scope.checkedFruits.indexOf(fruit) === -1) {
            $scope.checkedFruits.push(fruit);
        } else {
            $scope.checkedFruits.splice($scope.checkedFruits.indexOf(fruit), 1);
        }
    };
}

使用@Umur kontacabi这个例子,我认为在使用捕获选择的数据通过另一个对象/数组,像一个编辑页面。

捕获数据库中的选项

切换某个选项

例如,下面是所有颜色的json:

{
    "colors": [
        {
            "id": 1,
            "title": "Preto - #000000"
        },
        {
            "id": 2,
            "title": "Azul - #005AB1"
        },
        {
            "id": 3,
            "title": "Azul Marinho - #001A66"
        },
        {
            "id": 4,
            "title": "Amarelo - #FFF100"
        },
        {
            "id": 5,
            "title": "Vermelho - #E92717"
        },
        {
            "id": 6,
            "title": "Verde - #008D2F"
        },
        {
            "id": 7,
            "title": "Cinza - #8A8A8A"
        },
        {
            "id": 8,
            "title": "Prata - #C8C9CF"
        },
        {
            "id": 9,
            "title": "Rosa - #EF586B"
        },
        {
            "id": 10,
            "title": "Nude - #E4CAA6"
        },
        {
            "id": 11,
            "title": "Laranja - #F68700"
        },
        {
            "id": 12,
            "title": "Branco - #FFFFFF"
        },
        {
            "id": 13,
            "title": "Marrom - #764715"
        },
        {
            "id": 14,
            "title": "Dourado - #D9A300"
        },
        {
            "id": 15,
            "title": "Bordo - #57001B"
        },
        {
            "id": 16,
            "title": "Roxo - #3A0858"
        },
        {
            "id": 18,
            "title": "Estampado "
        },
        {
            "id": 17,
            "title": "Bege - #E5CC9D"
        }
    ]
}

以及2种类型的数据对象,包含一个对象的数组和包含两个/多个对象数据的对象:

在数据库中选择两个捕获项: [{" id ": 12,“标题”:“布兰科- # FFFFFF "}, {" id ": 16,“标题”:“Roxo - # 3 a0858”}] 在数据库中选择一个捕获项: {"id":12,"title":"Branco - #FFFFFF"}

这里是我的javascript代码:

/**
 * Add this code after catch data of database.
 */

vm.checkedColors = [];
var _colorObj = vm.formData.color_ids;
var _color_ids = [];

if (angular.isObject(_colorObj)) {
    // vm.checkedColors.push(_colorObj);
    _color_ids.push(_colorObj);
} else if (angular.isArray(_colorObj)) {
    angular.forEach(_colorObj, function (value, key) {
        // vm.checkedColors.push(key + ':' + value);
        _color_ids.push(key + ':' + value);
    });
}

angular.forEach(vm.productColors, function (object) {
    angular.forEach(_color_ids, function (color) {
        if (color.id === object.id) {
            vm.checkedColors.push(object);
        }
    });
});

/**
 * Add this code in your js function initialized in this HTML page
 */
vm.toggleColor = function (color) {
    console.log('toggleColor is: ', color);

    if (vm.checkedColors.indexOf(color) === -1) {
        vm.checkedColors.push(color);
    } else {
        vm.checkedColors.splice(vm.checkedColors.indexOf(color), 1);
    }
    vm.formData.color_ids = vm.checkedColors;
};

我的Html代码:

<div class="checkbox" ng-repeat="color in productColors">
    <label>
        <input type="checkbox"
               ng-checked="checkedColors.indexOf(color) != -1"
               ng-click="toggleColor(color)"/>
        <% color.title %>
    </label>
</div>

<p>checkedColors Output:</p>
<pre><% checkedColors %></pre>

[编辑]重构代码如下:

function makeCheckedOptions(objectOptions, optionObj) {
    var checkedOptions = [];
    var savedOptions = [];

    if (angular.isObject(optionObj)) {
        savedOptions.push(optionObj);
    } else if (angular.isArray(optionObj)) {
        angular.forEach(optionObj, function (value, key) {
            savedOptions.push(key + ':' + value);
        });
    }

    angular.forEach(objectOptions, function (object) {
        angular.forEach(savedOptions, function (color) {
            if (color.id === object.id) {
                checkedOptions.push(object);
            }
        });
    });

    return checkedOptions;
}

并调用new方法如下所示:

vm.checkedColors = makeCheckedOptions(productColors, vm.formData.color_ids);

就是这样!

这里还有另一个解决方案。我的解决方案的好处是:

它不需要任何额外的手表(这可能会影响性能) 它不需要控制器中的任何代码来保持干净 代码仍然有些短 它只需要很少的代码就可以在多个地方重用,因为它只是一个指令

下面是指令:

function ensureArray(o) {
    var lAngular = angular;
    if (lAngular.isArray(o) || o === null || lAngular.isUndefined(o)) {
        return o;
    }
    return [o];
}

function checkboxArraySetDirective() {
    return {
        restrict: 'A',
        require: 'ngModel',
        link: function(scope, element, attrs, ngModel) {
            var name = attrs.checkboxArraySet;

            ngModel.$formatters.push(function(value) {
                return (ensureArray(value) || []).indexOf(name) >= 0;
            });

            ngModel.$parsers.push(function(value) {
                var modelValue = ensureArray(ngModel.$modelValue) || [],
                    oldPos = modelValue.indexOf(name),
                    wasSet = oldPos >= 0;
                if (value) {
                    if (!wasSet) {
                        modelValue = angular.copy(modelValue);
                        modelValue.push(name);
                    }
                } else if (wasSet) {
                    modelValue = angular.copy(modelValue);
                    modelValue.splice(oldPos, 1);
                }
                return modelValue;
            });
        }
    }
}

最后就像这样使用它:

<input ng-repeat="fruit in ['apple', 'banana', '...']" type="checkbox" ng-model="fruits" checkbox-array-set="{{fruit}}" />

这就是全部了。唯一增加的是复选框-数组-set属性。

看看这个有效管理复选框列表的指令。我希望这对你有用。 检查表模型

这里是相同的jsFillde链接,http://jsfiddle.net/techno2mahi/Lfw96ja6/。

这使用了可以在http://vitalets.github.io/checklist-model/上下载的指令。

这是有指令的好处,因为你的应用程序会经常需要这个功能。

代码如下:

HTML:

<div class="container">
    <div class="ng-scope" ng-app="app" ng-controller="Ctrl1">
        <div class="col-xs-12 col-sm-6">
            <h3>Multi Checkbox List Demo</h3>
            <div class="well">  <!-- ngRepeat: role in roles -->
                <label ng-repeat="role in roles">
                    <input type="checkbox" checklist-model="user.roles" checklist-value="role"> {{role}}
                </label>
            </div>

            <br>
            <button ng-click="checkAll()">check all</button>
            <button ng-click="uncheckAll()">uncheck all</button>
            <button ng-click="checkFirst()">check first</button>
            <div>
                <h3>Selected User Roles </h3>
                <pre class="ng-binding">{{user.roles|json}}</pre>
            </div>

            <br>
            <div><b/>Provided by techno2Mahi</b></div>
        </div>

JavaScript

var app = angular.module("app", ["checklist-model"]);
app.controller('Ctrl1', function($scope) {
  $scope.roles = [
    'guest',
    'user',
    'customer',
    'admin'
  ];
  $scope.user = {
    roles: ['user']
  };
  $scope.checkAll = function() {
    $scope.user.roles = angular.copy($scope.roles);
  };
  $scope.uncheckAll = function() {
    $scope.user.roles = [];
  };
  $scope.checkFirst = function() {
    $scope.user.roles.splice(0, $scope.user.roles.length);
    $scope.user.roles.push('guest');
  };
});