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
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;
$scope.checked_fruits.push(fruit);
};
});
(这些按钮演示了更改数组也会更新复选框。)
最后，这里有一个关于Plunker指令的例子:http://plnkr.co/edit/3YNLsyoG4PIBW6Kj7dRK?p=preview
<input type='checkbox' ng-repeat="fruit in fruits"
ng-checked="checkedFruits.indexOf(fruit) != -1" ng-click="toggleCheck(fruit)">
.
function SomeCtrl ($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);
}
};
}
你可以结合AngularJS和jQuery。例如，您需要定义一个数组$scope。控制器中的Selected = [];
<label ng-repeat="item in items">
<input type="checkbox" ng-model="selected[$index]" ng-true-value="'{{item}}'">{{item}}
</label>
您可以获得拥有所选项目的数组。使用方法alert(JSON.stringify($scope.selected))，可以检查选中的项。
我认为下面的方法对于嵌套ng-repeat更加清晰和有用。看看普伦克。
引用本文:
<html ng-app="plunker">
<head>
<title>Test</title>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.4/angular.min.js"></script>
</head>
<body ng-controller="MainCtrl">
<div ng-repeat="tab in mytabs">
<h1>{{tab.name}}</h1>
<div ng-repeat="val in tab.values">
<input type="checkbox" ng-change="checkValues()" ng-model="val.checked"/>
</div>
</div>
<br>
<pre> {{selected}} </pre>
<script>
var app = angular.module('plunker', []);
app.controller('MainCtrl', function ($scope,$filter) {
$scope.mytabs = [
{
name: "tab1",
values: [
{ value: "value1",checked:false },
{ value: "value2", checked: false },
{ value: "value3", checked: false },
{ value: "value4", checked: false }
]
},
{
name: "tab2",
values: [
{ value: "value1", checked: false },
{ value: "value2", checked: false },
{ value: "value3", checked: false },
{ value: "value4", checked: false }
]
}
]
$scope.selected = []
$scope.checkValues = function () {
angular.forEach($scope.mytabs, function (value, index) {
var selectedItems = $filter('filter')(value.values, { checked: true });
angular.forEach(selectedItems, function (value, index) {
$scope.selected.push(value);
});
});
console.log($scope.selected);
};
});
</script>
</body>
</html>
我改编了Yoshi接受的答案来处理复杂的对象(而不是字符串)。
HTML
<div ng-controller="TestController">
<p ng-repeat="permission in allPermissions">
<input type="checkbox" ng-checked="selectedPermissions.containsObjectWithProperty('id', permission.id)" ng-click="toggleSelection(permission)" />
{{permission.name}}
</p>
<hr />
<p>allPermissions: | <span ng-repeat="permission in allPermissions">{{permission.name}} | </span></p>
<p>selectedPermissions: | <span ng-repeat="permission in selectedPermissions">{{permission.name}} | </span></p>
</div>
JavaScript
Array.prototype.indexOfObjectWithProperty = function(propertyName, propertyValue)
{
for (var i = 0, len = this.length; i < len; i++) {
if (this[i][propertyName] === propertyValue) return i;
}
return -1;
};
Array.prototype.containsObjectWithProperty = function(propertyName, propertyValue)
{
return this.indexOfObjectWithProperty(propertyName, propertyValue) != -1;
};
function TestController($scope)
{
$scope.allPermissions = [
{ "id" : 1, "name" : "ROLE_USER" },
{ "id" : 2, "name" : "ROLE_ADMIN" },
{ "id" : 3, "name" : "ROLE_READ" },
{ "id" : 4, "name" : "ROLE_WRITE" } ];
$scope.selectedPermissions = [
{ "id" : 1, "name" : "ROLE_USER" },
{ "id" : 3, "name" : "ROLE_READ" } ];
$scope.toggleSelection = function toggleSelection(permission) {
var index = $scope.selectedPermissions.indexOfObjectWithProperty('id', permission.id);
if (index > -1) {
$scope.selectedPermissions.splice(index, 1);
} else {
$scope.selectedPermissions.push(permission);
}
};
}
工作示例:http://jsfiddle.net/tCU8v/
