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

我喜欢Yoshi的回答。我增强了它,所以你可以对多个列表使用相同的函数。

<label ng-repeat="fruitName in fruits">
<input
type="checkbox"
name="selectedFruits[]"
value="{{fruitName}}"
ng-checked="selection.indexOf(fruitName) > -1"
ng-click="toggleSelection(fruitName, selection)"> {{fruitName}}
</label>


<label ng-repeat="veggieName in veggies">
<input
type="checkbox"
name="selectedVeggies[]"
value="{{veggieName}}"
ng-checked="veggieSelection.indexOf(veggieName) > -1"
ng-click="toggleSelection(veggieName, veggieSelection)"> {{veggieName}}
</label>



app.controller('SimpleArrayCtrl', ['$scope', function SimpleArrayCtrl($scope) {
  // fruits
  $scope.fruits = ['apple', 'orange', 'pear', 'naartjie'];
  $scope.veggies = ['lettuce', 'cabbage', 'tomato']
  // selected fruits
  $scope.selection = ['apple', 'pear'];
  $scope.veggieSelection = ['lettuce']
  // toggle selection for a given fruit by name
  $scope.toggleSelection = function toggleSelection(selectionName, listSelection) {
    var idx = listSelection.indexOf(selectionName);

    // is currently selected
    if (idx > -1) {
      listSelection.splice(idx, 1);
    }

    // is newly selected
    else {
      listSelection.push(selectionName);
    }
  };
}]);

http://plnkr.co/edit/KcbtzEyNMA8s1X7Hja8p?p=preview

其他回答

既然你接受了一个没有使用列表的答案,我就假设我的评论问题的答案是“不,它不一定是一个列表”。我也有这样的印象,也许您正在租用HTML服务器端,因为“checked”出现在您的示例HTML中(如果ng-model用于对复选框建模,则不需要这样做)。

不管怎样,这是我在问这个问题时想到的,也假设你正在生成HTML服务器端:

<div ng-controller="MyCtrl" 
 ng-init="checkboxes = {apple: true, orange: false, pear: true, naartjie: false}">
    <input type="checkbox" ng-model="checkboxes.apple">apple
    <input type="checkbox" ng-model="checkboxes.orange">orange
    <input type="checkbox" ng-model="checkboxes.pear">pear
    <input type="checkbox" ng-model="checkboxes.naartjie">naartjie
    <br>{{checkboxes}}
</div>

ng-init允许服务器端生成的HTML初始设置某些复选框。

小提琴。

另一个简单的指令可以是:

var appModule = angular.module("appModule", []);

appModule.directive("checkList", [function () {
return {
    restrict: "A",
    scope: {
        selectedItemsArray: "=",
        value: "@"
    },
    link: function (scope, elem) {
        scope.$watchCollection("selectedItemsArray", function (newValue) {
            if (_.contains(newValue, scope.value)) {
                elem.prop("checked", true);
            } else {
                elem.prop("checked", false);
            }
        });
        if (_.contains(scope.selectedItemsArray, scope.value)) {
            elem.prop("checked", true);
        }
        elem.on("change", function () {
            if (elem.prop("checked")) {
                if (!_.contains(scope.selectedItemsArray, scope.value)) {
                    scope.$apply(
                        function () {
                            scope.selectedItemsArray.push(scope.value);
                        }
                    );
                }
            } else {
                if (_.contains(scope.selectedItemsArray, scope.value)) {
                    var index = scope.selectedItemsArray.indexOf(scope.value);
                    scope.$apply(
                        function () {
                            scope.selectedItemsArray.splice(index, 1);
                        });
                }
            }
            console.log(scope.selectedItemsArray);
        });
    }
};
}]);

控制器:

appModule.controller("sampleController", ["$scope",
  function ($scope) {
    //#region "Scope Members"
    $scope.sourceArray = [{ id: 1, text: "val1" }, { id: 2, text: "val2" }];
    $scope.selectedItems = ["1"];
    //#endregion
    $scope.selectAll = function () {
      $scope.selectedItems = ["1", "2"];
  };
    $scope.unCheckAll = function () {
      $scope.selectedItems = [];
    };
}]);

而HTML:

<ul class="list-unstyled filter-list">
<li data-ng-repeat="item in sourceArray">
    <div class="checkbox">
        <label>
            <input type="checkbox" check-list selected-items-array="selectedItems" value="{{item.id}}">
            {{item.text}}
        </label>
    </div>
</li>

我还包括一个Plunker: http://plnkr.co/edit/XnFtyij4ed6RyFwnFN6V?p=preview

试试我的宝贝:

**

myApp.filter('inputSelected', function(){
  return function(formData){
    var keyArr = [];
    var word = [];
    Object.keys(formData).forEach(function(key){
    if (formData[key]){
        var keyCap = key.charAt(0).toUpperCase() + key.slice(1);
      for (var char = 0; char<keyCap.length; char++ ) {
        if (keyCap[char] == keyCap[char].toUpperCase()){
          var spacedLetter = ' '+ keyCap[char];
          word.push(spacedLetter);
        }
        else {
          word.push(keyCap[char]);
        }
      }
    }
    keyArr.push(word.join(''))
    word = [];
    })
    return keyArr.toString();
  }
})

**

然后对于任何带有复选框的ng-model,它将返回你选择的所有输入的字符串:

<label for="Heard about ITN">How did you hear about ITN?: *</label><br>
<label class="checkbox-inline"><input ng-model="formData.heardAboutItn.brotherOrSister" type="checkbox" >Brother or Sister</label>
<label class="checkbox-inline"><input ng-model="formData.heardAboutItn.friendOrAcquaintance" type="checkbox" >Friend or Acquaintance</label>


{{formData.heardAboutItn | inputSelected }}

//returns Brother or Sister, Friend or Acquaintance

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>

有两种方法可以解决这个问题。要么使用简单数组,要么使用对象数组。每种解决方案都有其优缺点。下面你将为每种情况找到一个解决方案。


使用简单数组作为输入数据

HTML可以是这样的:

<label ng-repeat="fruitName in fruits">
  <input
    type="checkbox"
    name="selectedFruits[]"
    value="{{fruitName}}"
    ng-checked="selection.indexOf(fruitName) > -1"
    ng-click="toggleSelection(fruitName)"
  > {{fruitName}}
</label>

适当的控制器代码是:

app.controller('SimpleArrayCtrl', ['$scope', function SimpleArrayCtrl($scope) {

  // Fruits
  $scope.fruits = ['apple', 'orange', 'pear', 'naartjie'];

  // Selected fruits
  $scope.selection = ['apple', 'pear'];

  // Toggle selection for a given fruit by name
  $scope.toggleSelection = function toggleSelection(fruitName) {
    var idx = $scope.selection.indexOf(fruitName);

    // Is currently selected
    if (idx > -1) {
      $scope.selection.splice(idx, 1);
    }

    // Is newly selected
    else {
      $scope.selection.push(fruitName);
    }
  };
}]);

优点:简单的数据结构和切换名称容易处理

缺点:添加/删除很麻烦,因为必须管理两个列表(输入和选择)


使用对象数组作为输入数据

HTML可以是这样的:

<label ng-repeat="fruit in fruits">
  <!--
    - Use `value="{{fruit.name}}"` to give the input a real value, in case the form gets submitted
      traditionally

    - Use `ng-checked="fruit.selected"` to have the checkbox checked based on some angular expression
      (no two-way-data-binding)

    - Use `ng-model="fruit.selected"` to utilize two-way-data-binding. Note that `.selected`
      is arbitrary. The property name could be anything and will be created on the object if not present.
  -->
  <input
    type="checkbox"
    name="selectedFruits[]"
    value="{{fruit.name}}"
    ng-model="fruit.selected"
  > {{fruit.name}}
</label>

适当的控制器代码是:

app.controller('ObjectArrayCtrl', ['$scope', 'filterFilter', function ObjectArrayCtrl($scope, filterFilter) {

  // Fruits
  $scope.fruits = [
    { name: 'apple',    selected: true },
    { name: 'orange',   selected: false },
    { name: 'pear',     selected: true },
    { name: 'naartjie', selected: false }
  ];

  // Selected fruits
  $scope.selection = [];

  // Helper method to get selected fruits
  $scope.selectedFruits = function selectedFruits() {
    return filterFilter($scope.fruits, { selected: true });
  };

  // Watch fruits for changes
  $scope.$watch('fruits|filter:{selected:true}', function (nv) {
    $scope.selection = nv.map(function (fruit) {
      return fruit.name;
    });
  }, true);
}]);

优点:添加/删除非常容易

缺点:有些复杂的数据结构和切换名称是麻烦的或需要一个帮助方法


演示:http://jsbin.com/ImAqUC/1/