AngularJS Material Select 选项组中如何自定义显示的文字?

How to customize displayed text in AngularJS Material Select Option Group?

我这里有一个片段

<span class="filter-lbl">Filter&nbsp;by:</span>
<md-input-container>
    <md-select md-container-class="filter-contribution-cont" ng-model="selected" ng-change="selectedChanged(); updateSelectedContribution();" multiple>
        <md-optgroup>
            <md-option ng-value="data.label" ng-click="dropdownClick(data)" ng-selected="data.selected" ng-repeat="data in dataSet | unique: 'label'">{{data.label}}</md-option>
        </md-optgroup>
    </md-select>
</md-input-container>

例如,我有一个函数用来构建我想要显示的名为 getSelectedContributions() 的文本,如何替换由 AngularJS [= 制作的内置显示文本23=]?

我对 AngularJS 还是很陌生,所以如果可能的话,我需要一个简单的解决方案。谢谢!

找到答案了。我只需要像这样

md-select 中添加 md-selected-text="getSelectedContributions()"
<span class="filter-lbl">Filter&nbsp;by:</span>
<md-input-container>
    <md-select md-selected-text="getSelectedContributions()" md-container-class="filter-contribution-cont" ng-model="selected" ng-change="selectedChanged(); updateSelectedContribution();" multiple>
        <md-optgroup>
            <md-option ng-value="data.label" ng-click="dropdownClick(data)" ng-selected="data.selected" ng-repeat="data in dataSet | unique: 'label'">{{data.label}}</md-option>
        </md-optgroup>
    </md-select>
</md-input-container>