目前尚不清楚您要实现的目标(我很确定会有更好的方法)，但您可以这样做:

It is not clear what you are trying to achieve (I'm pretty sure there will be some better way), but you could do it like this:

1.
在您的范围内定义承诺:

1.
Define a promise in your scope:

app.controller('myCtrl', function ($http, $scope) {
    $scope.model = {
        promise: $http.get('/my/service'),
        myField01: 'Hello, world, from 01 !',
        myField02: 'Hello, world, from 02 !',
        myField03: 'Hello, world, form 03 !'
    };
});

2.
在您的 HTML 中，引用该承诺以将其传递给您的指令:

2.
From your HTML, reference that promise in order to pass it to your directive:

<input type="text" my-field="model.promise" />

3.
将此承诺纳入指令的隔离范围:

3.
Get this promise into your directive's isolate scope:

app.directive ('myField', function ($compile) {
    return {
        scope: { promise: '=myField' },
        ...

4.
在您的 link 函数中，注册一个回调，以在承诺得到解决时(即您收到对您的请求的响应)并进行所有必要的操作:

4.
In your link function, register a callback for when the promise gets resolved (i.e. you get a response to your request) and do all necessary manipulation:

...
link: function (scope, elem, attrs) {
    scope.promise.success(function (data) {
        elem.removeAttr('my-field');
        elem.attr('ng-model', 'model.' + data.fieldName);
        $compile(elem)(scope.$parent);
    });
}

另请参阅此简短演示.