Javascript 引导typeahead未填充来自promise的响应

我的引导类型如下所示：

<input id="inputId" type="text" ng-model="selected" typeahead="name for name in getSuggestions($viewValue) " typeahead-on-select="typeaheadOnSelect($item)" ng-trim="false">

$scope.getSuggestions = viewValue => {

    let deferred = $q.defer();

    getSuggestions(viewValue).then(words => {
        deferred.resolve(words); // array of strings
    })
    .catch(()=>{
        deferred.reject([]);
    });

    return deferred.promise;

};

$scope.getSuggestions = viewValue => {

    let deferred = $q.defer();

    getSuggestions(viewValue).then(words => {
        deferred.resolve(words); 
        $scope.$digest();//this triggers the digest cycle 
    })
    .catch(()=>{
        deferred.reject([]);
    });

    return deferred.promise;

};

---

注意：当getSuggestions（）返回数组而不使用任何承诺时，typeahead可以正常工作。

在AngularJS中，resolve（）的结果在$digest循环内异步传播，而不是立即传播。这意味着只有在（稍后）发生摘要循环时才会调用使用then（）注册的回调

因此，调用$digest（）或者如果需要，$apply（）是运行摘要循环的一种方法

因此，需要将给定代码更新为以下内容：

<input id="inputId" type="text" ng-model="selected" typeahead="name for name in getSuggestions($viewValue) " typeahead-on-select="typeaheadOnSelect($item)" ng-trim="false">

$scope.getSuggestions = viewValue => {

    let deferred = $q.defer();

    getSuggestions(viewValue).then(words => {
        deferred.resolve(words); // array of strings
    })
    .catch(()=>{
        deferred.reject([]);
    });

    return deferred.promise;

};

$scope.getSuggestions = viewValue => {

    let deferred = $q.defer();

    getSuggestions(viewValue).then(words => {
        deferred.resolve(words); 
        $scope.$digest();//this triggers the digest cycle 
    })
    .catch(()=>{
        deferred.reject([]);
    });

    return deferred.promise;

};

---

$scope.getSuggestions

返回承诺，对不对。。。所以，它不会返回一个你可以使用的数组with@JaromandaXtypeahead可以很好地实现承诺。我可以这么说，因为typeahead弹出窗口有时会出现，但很少出现。