角材料md-select显示选择的数量 [英] Angular Material md-select Displaying quantity selected
本文介绍了角材料md-select显示选择的数量的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有没有一种方法可以使用Md-select对角材料进行显示以显示选中了多少个复选框,而不是显示所有选定值.例如,如果我有4个选项,意式香肠,奶酪,香肠和蔬菜,则选择其中三个.我将如何显示"3 Selected",而不是写出全部选择.
Is there a way using Md-select for angular material to display how many checkboxes were checked instead of displaying all of the selected values. For example If I have 4 options pepperoni, cheese, sausage and veggies and I select three of them . How would I display "3 Selected", Instead of writing out the entire selections.
推荐答案
您的意思是这样的吗? - CodePen
Do you mean something like this? - CodePen
标记
<div ng-controller="SelectOptGroupController as vm" class="md-padding" ng-cloak="" ng-app="MyApp">
<div>
<h1 class="md-title">Pick your pizza toppings</h1>
<md-input-container md-no-float>
<label>Toppings</label>
<md-select ng-model="vm.selectedToppings" multiple="" md-selected-text="vm.text" md-offset="0 30">
<md-option ng-value="topping.name" ng-repeat="topping in vm.toppings">{{topping.name}}</md-option>
</md-select>
</md-input-container>
</div>
</div>
JS
angular.module('MyApp',['ngMaterial'])
.controller('SelectOptGroupController', function($scope) {
var vm = this;
vm.toppings = [
{ name: 'Pepperoni' },
{ name: 'Cheese' },
{ name: 'Sausage' },
{ name: 'Veggies' }
];
vm.selectedToppings = [];
$scope.$watch("vm.selectedToppings", function () {
vm.text = vm.selectedToppings.length + " Toppings selected";
})
});
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