<select ng-model="output">
   <option ng-repeat="(key,val) in dictionary" value="{{key}}">{{val}}</option>
</select>

在ng-options中选择一个项目可能有点棘手，这取决于您如何设置数据源。

在与它们斗争了一段时间后，我最终用我使用的最常用的数据源制作了一个样本。你可以在这里找到它:

http://plnkr.co/edit/fGq2PM?p=preview

现在要让ng-options工作，需要考虑以下几点:

Normally you get the options from one source and the selected value from other. For example: states :: data for ng-options user.state :: Option to set as selected Based on 1, the easiest/logical thing to do is to fill the select with one source and then set the selected value trough code. Rarely would it be better to get a mixed dataset. AngularJS allows select controls to hold more than key | label. Many online examples put objects as 'key', and if you need information from the object set it that way, otherwise use the specific property you need as key. (ID, CODE, etc.. As in the plckr sample) The way to set the value of the dropdown/select control depends on #3, If the dropdown key is a single property (like in all examples in the plunkr), you just set it, e.g.: $scope.dropdownmodel = $scope.user.state; If you set the object as key, you need to loop trough the options, even assigning the object will not set the item as selected as they will have different hashkeys, e.g.: for (var i = 0, len = $scope.options.length; i < len; i++) { if ($scope.options[i].id == savedValue) { // Your own property here: console.log('Found target! '); $scope.value = $scope.options[i]; break; } }

您可以在另一个对象$scope.myObject.myProperty中替换相同属性的savedValue。

ng-options指令不会为数组的<options>元素设置value属性:

使用限制。值为极限。“limits”中的“limit”表示:

将<option>的标签设置为limit.text 保存限制。Value值到选择的ng-model中

参见Stack Overflow问题AngularJS ng-options不呈现值。

而不是使用新的'track by'功能，你可以简单地对一个数组这样做，如果你想要的值与文本相同:

<select ng-options="v as v for (k,v) in Array/Obj"></select>

注意标准语法之间的区别，标准语法将使值成为对象/数组的键，因此对于数组来说是0、1、2等:

<select ng-options"k as v for (k,v) in Array/Obj"></select>

K (v)变成了v (v)

我是根据语法常识发现这一点的。 (k,v)是将数组/对象拆分为键值对的实际语句。

在'k as v'语句中，k将是值，v将是显示给用户的文本选项。我认为“track by”是一种混乱和过度的表达。

value属性如何获取其值:

当使用数组作为数据源时，它将是数组元素在每次迭代中的索引; 当使用对象作为数据源时，它将是每次迭代中的属性名。

所以在你的例子中，它应该是:

obj = { '1': '1st', '2': '2nd' };

<select ng-options="k as v for (k,v) in obj"></select>

See ngOptions ngOptions(optional) – {comprehension_expression=} – in one of the following forms: For array data sources: label for value in array select as label for value in array label group by group for value in array select as label group by group for value in array track by trackexpr For object data sources: label for (key , value) in object select as label for (key , value) in object label group by group for (key, value) in object select as label group by group for (key, value) in object

对你来说，应该是

array = [{ "value": 1, "text": "1st" }, { "value": 2, "text": "2nd" }];

<select ng-options="obj.value as obj.text for obj in array"></select>

更新

随着AngularJS的更新，现在可以用track by表达式为select element的value属性设置实际值了。

<select ng-options="obj.text for obj in array track by obj.value">
</select>

如何记住这些丑陋的东西

对于那些很难记住这种语法形式的人:我同意这不是最简单或最漂亮的语法。这种语法是Python列表推导式的扩展版本，知道这一点有助于我很容易地记住语法。大概是这样的:

Python代码:

my_list = [x**2 for x in [1, 2, 3, 4, 5]]
> [1, 4, 9, 16, 25]

# Let people to be a list of person instances
my_list2 = [person.name for person in people]
> my_list2 = ['Alice', 'Bob']

这实际上与上面列出的第一个语法相同。但是，在<select>中，我们通常需要区分代码中的实际值和<select>元素中显示的文本(标签)。

比如，我们需要人手。Id，但我们不想把Id显示给用户;我们想要显示它的名字。同样，我们对代码中的person.name不感兴趣。这里有as关键字来标记东西。所以它变成了这样:

person.id as person.name for person in people

或者，代替person。Id我们可能需要person实例/引用本身。见下文:

person as person.name for person in people

对于JavaScript对象，同样的方法也适用。只需要记住，对象中的项是用(key, value)对解构的。