我想让我的页面重量轻一些。我有一些元素必须是选择选项,但我需要它们加载就像用户触摸控件。也许会在一瞬间显示一个加载对话框,以便给予反馈。我怎么能在Angular中做到这一点?我尝试了ng-click和ng-focus来触发模型选项,但它永远不会触发。
<select name="Category" ng-model="selectedCategory" ng-options="item.name as item.name for item in categories">
<option value="" disabled selected>All Categories</option>
</select>
答案 0 :(得分:2)
ng-focus
应该有效。只需让$scope.categories
作为空数组开始,然后将其填充到ng-focus
函数中:
$scope.categories = [];
$scope.selectedCategory = {};
$scope.loadOptions = function() {
if ($scope.categories.length == 0) {
$scope.categories = [{
name: 'option1'
}, {
name: 'option2'
}, {
name: 'option3'
}];
}
}
HTML:
<select name="Category" ng-model="selectedCategory"
ng-options="item.name as item.name for item in categories"
ng-focus="loadOptions()">