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
在HTML中(假设复选框位于表中每一行的第一列)。
<tr ng-repeat="item in fruits">
<td><input type="checkbox" ng-model="item.checked" ng-click="getChecked(item)"></td>
<td ng-bind="fruit.name"></td>
<td ng-bind="fruit.color"></td>
...
</tr>
在controllers.js文件:
// The data initialization part...
$scope.fruits = [
{
name: ....,
color:....
},
{
name: ....,
color:....
}
...
];
// The checked or not data is stored in the object array elements themselves
$scope.fruits.forEach(function(item){
item.checked = false;
});
// The array to store checked fruit items
$scope.checkedItems = [];
// Every click on any checkbox will trigger the filter to find checked items
$scope.getChecked = function(item){
$scope.checkedItems = $filter("filter")($scope.fruits,{checked:true});
};
其他回答
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
<div ng-app='app' >
<div ng-controller='MainCtrl' >
<ul>
<li ng-repeat="tab in data">
<input type='checkbox' ng-click='change($index,confirm)' ng-model='confirm' />
{{tab.name}}
</li>
</ul>
{{val}}
</div>
</div>
var app = angular.module('app', []);
app.controller('MainCtrl',function($scope){
$scope.val=[];
$scope.confirm=false;
$scope.data=[
{
name:'vijay'
},
{
name:'krishna'
},{
name:'Nikhil'
}
];
$scope.temp;
$scope.change=function(index,confirm){
console.log(confirm);
if(!confirm){
($scope.val).push($scope.data[index]);
}
else{
$scope.temp=$scope.data[index];
var d=($scope.val).indexOf($scope.temp);
if(d!=undefined){
($scope.val).splice(d,1);
}
}
}
})
根据我在这里的另一篇文章，我已经做了一个可重用的指令。
查看GitHub存储库
(function () { angular .module("checkbox-select", []) .directive("checkboxModel", ["$compile", function ($compile) { return { restrict: "A", link: function (scope, ele, attrs) { // Defining updateSelection function on the parent scope if (!scope.$parent.updateSelections) { // 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. scope.$parent.updateSelections = 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) } } } } // Adding or removing attributes ele.attr("ng-checked", attrs.checkboxModel + ".indexOf(" + attrs.checkboxValue + ") > -1") var multiple = attrs.multiple ? "true" : "false" ele.attr("ng-click", "updateSelections(" + [attrs.checkboxModel, attrs.checkboxValue, multiple].join(",") + ")") // Removing the checkbox-model attribute, // it will avoid recompiling the element infinitly ele.removeAttr("checkbox-model") ele.removeAttr("checkbox-value") ele.removeAttr("multiple") $compile(ele)(scope) } } }]) // Defining app and controller angular .module("APP", ["checkbox-select"]) .controller("demoCtrl", ["$scope", function ($scope) { var dc = this dc.list = [ "selection1", "selection2", "selection3" ] // Define the selections containers here dc.multipleSelections = [] dc.individualSelections = [] }]) })() label { display: block; } <!DOCTYPE html> <html> <head> <link rel="stylesheet" href="style.css" /> </head> <body ng-app="APP" ng-controller="demoCtrl as dc"> <h1>checkbox-select demo</h1> <h4>Multiple Selections</h4> <label ng-repeat="thing in dc.list"> <input type="checkbox" checkbox-model="dc.multipleSelections" checkbox-value="thing" multiple> {{thing}} </label> <p>dc.multipleSelecitons:- {{dc.multipleSelections}}</p> <h4>Individual Selections</h4> <label ng-repeat="thing in dc.list"> <input type="checkbox" checkbox-model="dc.individualSelections" checkbox-value="thing"> {{thing}} </label> <p>dc.individualSelecitons:- {{dc.individualSelections}}</p> <script data-require="jquery@3.0.0" data-semver="3.0.0" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.js"></script> <script data-require="angular.js@1.5.6" data-semver="1.5.6" src="https://code.angularjs.org/1.5.6/angular.min.js"></script> <script src="script.js"></script> </body> </html>
这里有一个快速的可重用的小指令，它似乎可以做你想做的事情。我简单地称之为清单。它在复选框更改时更新数组，并在数组更改时更新复选框。
app.directive('checkList', function() {
return {
scope: {
list: '=checkList',
value: '@'
},
link: function(scope, elem, attrs) {
var handler = function(setup) {
var checked = elem.prop('checked');
var index = scope.list.indexOf(scope.value);
if (checked && index == -1) {
if (setup) elem.prop('checked', false);
else scope.list.push(scope.value);
} else if (!checked && index != -1) {
if (setup) elem.prop('checked', true);
else scope.list.splice(index, 1);
}
};
var setupHandler = handler.bind(null, true);
var changeHandler = handler.bind(null, false);
elem.bind('change', function() {
scope.$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;
$scope.checked_fruits.push(fruit);
};
});
(这些按钮演示了更改数组也会更新复选框。)
最后，这里有一个关于Plunker指令的例子:http://plnkr.co/edit/3YNLsyoG4PIBW6Kj7dRK?p=preview
你不需要编写所有的代码。AngularJS会通过使用ngTrueValue和ngFalseValue来使模型和复选框保持同步
代码在这里:http://codepen.io/paulbhartzog/pen/kBhzn
代码片段:
<p ng-repeat="item in list1" class="item" id="{{item.id}}">
<strong>{{item.id}}</strong> <input name='obj1_data' type="checkbox" ng-model="list1[$index].data" ng-true-value="1" ng-false-value="0"> Click this to change data value below
</p>
<pre>{{list1 | json}}</pre>
