Angularjs 角度Js：选择框设置选定值

我有一个选择框

 <select populate-details ng-model="properties.maxRetries.type" ng-options="value as text for (text, value) in presentation.sources.maxR_Source"></select>

我想将选项“分钟”设置为初始选择。我怎么能那样呢

请帮忙，

---

谢谢。

在控制器中，设置

$scope.properties.maxRetries.type='Minutes'

。然后，您的ng模型将拾取该值并将其应用于选项

    angular.module("test.directives").directive("populateDetails", function() {
      return {
        link: function(scope, elem, attrs, ctrl) {
          scope.presentation.sources.maxR_Source = {
            "Hours": "4",
            "Minutes": "5",
            "Seconds": "6"
          };
        }
      };
    });