所以我是Angular的新手,就像现在刚刚开始所以请耐心等待...我想通过数组循环,然后在循环内部评估一个条件,显示一些HTML,如下所示:
<div ng-controller="BuilderController">
<div ng-repeat="row in formRows" class="fe-form-row">
<div class="fe-form-draggable-item">
<div class="fe-form-l-side-menu bg-primary col-md-1 pull-left">
<i class="fa fa-cog"></i>
<i class="fa fa-close"></i>
</div>
<div class="gray-lighter col-md-11 pull-left">
<div ng-if="row.columns.length == 0">
<div ng-click="open('lg','layout')" id="fe-form-container-base" class="fe-form-r-side-menu gray-lighter col-md-12">
<div class="fe-form-insert-menu">
<i class="fa fa-plus-square-o"></i>
<span>Add Column(s)</span>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
第一次arround列是一个空数组,因此它的计算结果为true,并显示HTML部分,一切都很好。我尝试将其设置为不是一个空数组,并计算为false并且不显示HTML。到现在为止还挺好。问题是当我更改控制器内的列值时:
admin_app.controller('BuilderController', function ($scope, $modal, $log) {
//default value, empty row
//TODO: assign value to these and the form should be automatically created
$scope.formRows = [
{
'layout': 'empty',
columns: []
}
];
$scope.animationsEnabled = true;
//TODO: these should be loaded from server-side somehow...
$scope.columnsOptions = ['1', '2', '3', '4', '5', '6'];
$scope.open = function (size, content) {
var modalInstance = $modal.open({
animation: $scope.animationsEnabled,
templateUrl: 'fe-form-' + content + '-container.html',
controller: 'ModalInstanceCtrl',
windowClass: 'fe-form-builder',
size: size,
resolve: {
columnsOptions: function () {
return $scope.columnsOptions;
}
}
});
modalInstance.result.then(function (selectedItem) {
$scope.selected = selectedItem;
}, function () {
$log.info('Modal dismissed at: ' + new Date());
});
$scope.toggleAnimation = function () {
$scope.animationsEnabled = !$scope.animationsEnabled;
};
};
});
admin_app.controller('ModalInstanceCtrl', function ($scope, $modalInstance, columnsOptions) {
$scope.columnsOptions = columnsOptions;
$scope.selected = {
columnsOption: $scope.columnsOptions[0]
};
$scope.ok = function () {
var columns = [];
for (var i = 0; i < $scope.selected.columnsOption; i++) {
columns.push({
type: $scope.selected.columnsOption,
elements: []
});
}
//update formRows var with new columns
$scope.formRows = [
{
'layout': $scope.selected.columnsOption,
columns: columns
}
];
console.log(' $scope.formRows ', $scope.formRows[0].columns.length);
$modalInstance.close($scope.selected.item);
};
$scope.cancel = function () {
$modalInstance.dismiss('cancel');
};
});
console.log显示已根据用户输入正确更新了列,但由于列不再是空数组,因此不会重新呈现HTML以隐藏HTML片段。我在这里遗漏了什么,我的方法有问题吗?正如我所提到的,我对Angular很新。
答案 0 :(得分:0)
如果我理解正确,您的数据结构是这样的:
formRows - &gt;阵列
行 - &gt;包含另一个对象列的对象
列 - &gt;数组
我认为问题在于Angular正在跟踪对formRows的任何更改,当您的列对象发生更改时,这些更改不会发生,因为formRows中没有直接更改。 Angular并没有试图检查子子对象级别的变化,可以这么说。您可以在每次更改行时创建新对象并将其添加回formRows。或者,您可以添加一个deepwatch来检查列数组的更改。检查一下: