AngularJS将函数从Controller传递到指令（或从指令调用控制器函数）-带参数

Question

My question is very simple, I just want to pass a controller function to directive. In other terms, I just want to call a controller function from directive.

 var myapp =angular.module('myapp',[]); myapp.controller('myCtrl',['$scope','$timeout',function($scope,$timeout){ $scope.fnItemsOnAdded = function(itms){ alert('Hi, I am in controller add. Here are your Items: '+JSON.stringify(itms)); } $scope.fnItemsOnCancel = function(itms){ alert('Hi, I am in controller cancel. Here are your Items: '+JSON.stringify(itms)); } }]); myapp.directive('myPicker',['$timeout',function($timeout){ var dtv={}; dtv.template = '<li ng-repeat="itm in ngModel.ItemsList"><label><input type="checkbox" ng-model="itm.IsSelected" />{{itm.Name}}</label></li>'; dtv.template += '<a href="javascript:void(0)" ng-click="addItems()" class="addItems">add items</a>'; dtv.template += '<a href="javascript:void(0)" ng-click="cancelItems()" class="cancel">cancel</a>'; dtv.scope = { postUrl: '@', jsonadd: '&', jsoncancel: '&' }; dtv.restrict = 'A'; dtv.link = function($scope,elm,attrs){ $scope.ngModel={}; $scope.ngModel.SelectedKeys=[]; $timeout(function(){ $scope.ngModel.ItemsList = [ {Name:"Item1",IsSelected:false}, {Name:"Item2",IsSelected:false}, {Name:"Item3",IsSelected:false}, {Name:"Item4",IsSelected:true}, {Name:"Item4",IsSelected:false}, ]; },100); $scope.addItems = function(){ //Dummy logic to update SelectedKeys for(var idx =0;idx<$scope.ngModel.ItemsList.length;idx++){ if($scope.ngModel.ItemsList[idx].IsSelected){ $scope.ngModel.SelectedKeys.push($scope.ngModel.ItemsList[idx]); } } alert("i'm in directive add. Lemme call parent controller"); $scope.jsonadd($scope.ngModel.SelectedKeys); } $scope.cancelItems = function(){ alert("i'm in directive cancel. Lemme call parent controller"); $scope.jsonadd($scope.ngModel.SelectedKeys); } } return(dtv); }]); 

 <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-app="myapp" ng-controller="myCtrl"> <div class="jqmWindow" id="myPickListDiv" my-picker jsonadd="fnItemsOnAdded" jsoncancel="fnItemsOnCancel" post-url="/myurl"></div> </div> 

• I have tried this approach but it doesn't trigger the function, doesn't throw any error either.
• I tried this and this approach - it returns an error $apply is already in progress.

Can anybody please help me where I'm going wrong here. I believe it has got something to do with $scope inheritance or convention.

I know I am doing some petty mistake here, just that I am can't figure it in the rush I am.

Thank you very much for you help!

Answer 1

You're almost there. The syntax for passing params is a little strange.

In your HTML, use something like

<div my-picker jsonadd="fnItemsOnAdded(items)"...

and in your directive...

$scope.jsonadd({items: $scope.ngModel.SelectedKeys})

The keys in the object passed to the isolate scope function ( jsonadd , jsoncancel ) need to match the argument names used in the attribute.

I don't know where SelectedKeys comes from but I assume you've just omitted something for brevity.