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
这里有一个快速的可重用的小指令，它似乎可以做你想做的事情。我简单地称之为清单。它在复选框更改时更新数组，并在数组更改时更新复选框。
app.directive('checkList', function() {
return {
scope: {
list: '=checkList',
value: '@'
},
link: function(scope, elem, attrs) {
var handler = function(setup) {
var checked = elem.prop('checked');
var index = scope.list.indexOf(scope.value);
if (checked && index == -1) {
if (setup) elem.prop('checked', false);
else scope.list.push(scope.value);
} else if (!checked && index != -1) {
if (setup) elem.prop('checked', true);
else scope.list.splice(index, 1);
}
};
var setupHandler = handler.bind(null, true);
var changeHandler = handler.bind(null, false);
elem.bind('change', function() {
scope.$apply(changeHandler);
});
scope.$watch('list', setupHandler, true);
}
};
});
这里有一个控制器和一个显示如何使用它的视图。
<div ng-app="myApp" ng-controller='MainController'>
<span ng-repeat="fruit in fruits">
<input type='checkbox' value="{{fruit}}" check-list='checked_fruits'> {{fruit}}<br />
</span>
<div>The following fruits are checked: {{checked_fruits | json}}</div>
<div>Add fruit to the array manually:
<button ng-repeat="fruit in fruits" ng-click='addFruit(fruit)'>{{fruit}}</button>
</div>
</div>
app.controller('MainController', function($scope) {
$scope.fruits = ['apple', 'orange', 'pear', 'naartjie'];
$scope.checked_fruits = ['apple', 'pear'];
$scope.addFruit = function(fruit) {
if ($scope.checked_fruits.indexOf(fruit) != -1) return;
$scope.checked_fruits.push(fruit);
};
});
(这些按钮演示了更改数组也会更新复选框。)
最后，这里有一个关于Plunker指令的例子:http://plnkr.co/edit/3YNLsyoG4PIBW6Kj7dRK?p=preview
其他回答
一种简单的HTML方法:
<input type="checkbox" ng-checked="fruits.indexOf('apple') > -1" ng-click="fruits.indexOf('apple') > -1 ? fruits.splice(fruits.indexOf('apple'), 1) : fruits.push('apple')"> <input type="checkbox" ng-checked="fruits.indexOf('orange') > -1" ng-click="fruits.indexOf('orange') > -1 ? fruits.splice(fruits.indexOf('orange'), 1) : fruits.push('orange')"> <input type="checkbox" ng-checked="fruits.indexOf('pear') > -1" ng-click="fruits.indexOf('pear') > -1 ? fruits.splice(fruits.indexOf('pear'), 1) : fruits.push('pear')"> <input type="checkbox" ng-checked="fruits.indexOf('naartjie') > -1" ng-click="fruits.indexOf('apple') > -1 ? fruits.splice(fruits.indexOf('apple'), 1) : fruits.push('naartjie')">
我认为最简单的解决方法是使用'select'并指定'multiple':
<select ng-model="selectedfruit" multiple ng-options="v for v in fruit"></select>
否则，我认为您将不得不处理该列表来构造该列表 (通过$watch()用复选框绑定模型数组)。
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!
根据这个线程中的回答，我创建了涵盖所有情况的清单模型指令:
简单的原语数组 对象数组(选择id或整个对象) 对象属性迭代
对于主题启动案例，它将是:
<label ng-repeat="fruit in ['apple', 'orange', 'pear', 'naartjie']">
<input type="checkbox" checklist-model="selectedFruits" checklist-value="fruit"> {{fruit}}
</label>
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>
