ngular ionic select ng-options 默认选择第一个值的写法

1. html

<select ng-model="selectOrderState" style="border:none;left:0" ng-options="state.name for state in orderStates"></select>

2. js

    //订单状态   
    $scope.orderStates=[    
            {name:'全部',id:""},
            {name:'等待审核',id:"252001"},
            {name:'审核通过',id:"252002"},
            {name:'审核未通过',id:"252003"},
            {name:'用车中',id:"252004"},
            {name:'已还车',id:"252005"},
            {name:'已取消',id:"252006"},
            {name:'过时未审',id:"252007"}
    ];
    //设置默认选择选项
    $scope.selectOrderState=$scope.orderStates[0]

3. 获取选择值

$scope.selectOrderState.id