angularjs - 选中/取消选中所有复选框 - AngularJS ng-repeat

Question

我的结构如下所示:http://jsfiddle.net/deeptechtons/TKVH6/

<div>
<ul ng-controller="checkboxController">
    <li>Check All
        <input type="checkbox" ng-model="selectedAll" ng-click="checkAll()" />
    </li>
    <li ng-repeat="item in Items">
        <label>{{item.Name}}
            <input type="checkbox" ng-model="item.Selected" />
        </label>
    </li>
</ul>
</div>

angular.module("CheckAllModule", [])
.controller("checkboxController", function checkboxController($scope) {


$scope.Items = [{
    Name: "Item one"
}, {
    Name: "Item two"
}, {
    Name: "Item three"
}];
$scope.checkAll = function () {
    if ($scope.selectedAll) {
        $scope.selectedAll = true;
    } else {
        $scope.selectedAll = false;
    }
    angular.forEach($scope.Items, function (item) {
        item.Selected = $scope.selectedAll;
    });

};


});

选中或取消选中所有复选框时，将选中所有其他复选框。 But when "Check All"is selected, and I deselect one of the items, I want "Check All"to be deselected.

提前致谢!

(PS:感谢 deeptechtons 的 JSFiddle)

Answer 1

如果您使用的是 Angular 1.3+，您可以使用 ng-model-options 中的 getterSetter 来解决这个问题并避免手动跟踪 allSelected状态

HTML:

<input type="checkbox" ng-model="allSelected" ng-model-options="{getterSetter: true}"/>

JS:

var getAllSelected = function () {
    var selectedItems = $scope.Items.filter(function (item) {
        return item.Selected;
    });

    return selectedItems.length === $scope.Items.length;
}

var setAllSelected = function (value) {
    angular.forEach($scope.Items, function (item) {
        item.Selected = value;
    });
}

$scope.allSelected = function (value) {
    if (value !== undefined) {
        return setAllSelected(value);
    } else {
        return getAllSelected();
    }
}

http://jsfiddle.net/2jm6x4co/