用 ng-model 说这是你的选择

<select 
    ng-model="language.selected" 
    ng-init="language.selected = settings.language[settings.language.selected.id]" 
    ng-options="l.label for l in settings.language" 
    ng-change="updateLanguage(language.selected)">

在您的控制器中

$scope.settings = {
enableEventsNotification: true,
enableiBeaconNotification: true,
hours: [
    { id: 0, label: '3h', value: 3 },
    { id: 1, label: '6h', value: 6 },
    { id: 2, label: '9h', value: 9 },
    { id: 3, label: '12h', value: 12 },
    { id: 4, label: '24h', value: 24 }
  ],
language: [
    { id: 0, label: 'English', value: 'en-us' },
    { id: 1, label: 'Francais', value: 'fr-fr' }
  ] 
};
$scope.hours = [];
$scope.hours.selected = $localstorage.getObject('hours',   $scope.settings.hours[1]);
$scope.settings.hours.selected = $localstorage.getObject('hours', $scope.settings.hours[1]);
$scope.hours.selected = $scope.hours.selected;

我认为您需要根据 select 指令中定义的理解表达式确保selectedContentType需要成为id选项对象的字段。

综合表达式定义为

item.id as item.name for item in option.contentTypesPlus

item.id将是存储在ng-model option.selectedContentType