如何将属性值传递给指令模板中使用的函数？

Question

我想构建一个可重用的自动完成文本字段组件。目前我无法重复使用，只能有一个实例。

这是模板：

<md-content class="md-padding"> 
<form ng-submit="$event.preventDefault()"> 
    <md-autocomplete 
      ng-disabled="isDisabled" 
      md-selected-item="selectedItem" 
      md-search-text-change="searchTextChange(searchText)" 
      md-search-text="searchText" 
      md-selected-item-change="selectedItemChange(item)" 
      md-items="item in querySearch(searchText, dataArray)" 
      md-item-text="item.display" 
      md-min-length="0" 
      placeholder="{{placeholderText}}"> 
     <md-item-template> 
      <span md-highlight-text="searchText" md-highlight-flags="^i">{{item.display}}</span> 
     </md-item-template> 
    </md-autocomplete> 
</form> 

这是我的HTML：

<div ng-controller="myController" layout="column" ng-cloak> 
    <auto-complete a = "{{data1}}"></auto-complete> 
    <auto-complete a = "{{data2}}"></auto-complete> 
</div> 

可自定义的唯一部分是数据，这是一个字符串数组。

这是控制器和指令：

angular 
.module('myApp', ['ngMaterial']) 
.controller('myController',['$scope', '$timeout','$q', '$log', function($scope, $timeout, $q, $log) { 
    $scope.simulateQuery = false; 
    $scope.isDisabled = false; 
    // assign the data 
    $scope.data1  = loadDataArray(); 
    $scope.querySearch = querySearch; 
    $scope.selectedItemChange = selectedItemChange; 
    $scope.searchTextChange = searchTextChange; 
    $scope.placeholderText = "Choose a state"; 
    $scope.data2 = ['a', 'b', 'c']; 
    $scope.dataArray = []; 

    function querySearch (query, data) { 
     var results = query ? data.filter(createFilterFor(query)) : data, deferred; 
     if ($scope.simulateQuery) { 
      deferred = $q.defer(); 
      $timeout(function() { 
        deferred.resolve(results); 
       }, 
       Math.random() * 1000, false); 
      return deferred.promise; 
     } else { 
      return results; 
     } 
    } 

    //filter function for search query 
    function createFilterFor(query) { 
     var lowercaseQuery = angular.lowercase(query); 
     return function filterFn(record) { 
      return (record.value.indexOf(lowercaseQuery) === 0); 
     }; 
    } 

    // Run this function each time search text is changed 
    function searchTextChange(text) { 
     $log.info('Text changed to ' + text); 
    } 
    // Run this function each time a new item is selected 
    function selectedItemChange(item) { 
     $log.info('Item changed to ' + JSON.stringify(item)); 
    } 
    //build list of states as map of key-value pairs 
    function loadDataArray() { 
     var allStates = 'Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware,\ 
      Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana,\ 
      Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana,\ 
      Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina,\ 
      North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina,\ 
      South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia,\ 
      Wisconsin, Wyoming'; 
     return allStates.split(/, +/g).map(function (state) { 
      return { 
       value: state.toLowerCase(), 
       display: state 
      }; 
     }); 
    } 
}]).directive('autoComplete', function(){ 
    return { 
     restrict: "E", 
     link: function(scope, element, attr) { 
      scope.dataArray = attr.a; 
     }, 
     templateUrl: "temp.html", 
     replace: true 
    } 
}); 

Answer 1

它的工作我修改下指令后是这样的：

return { 
    scope: true, 
    restrict: "E", 
    link: function(scope, element, attr) { 
     scope.dataArray = attr.a; 
    }, 
    templateUrl: "temp.html", 
    replace: true 
} 

Answer 2

试图改变这样的指令。

.directive('autoComplete', function(){ 
    return { 
     restrict: "E", 
     scope: { 
      'data' : '=a' 
     }, 
     link: function(scope, element, attr) { 
      scope.dataArray = scope.data; 
     }, 
     templateUrl: "temp.html", 
     replace: true 
    } 
});