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Back to top inferred injectionThere are also concepts of dependency injection in Angularjs, like dependency injection in spring, but different. There are some additional things you need to do to use construct injection or set value injection in spring, but it is convenient to just declare it where you need it, like a reference to a module, in angular.
Reference: [Angular API Doc] (http://docs.angularjs.cn/api/auto/service/$injector)
This injection method requires that the parameter name be the same as the service name. If the code is compressed and so on, it will cause the injection to fail.
App.controller ("MyCtrl1", Function ($scope, Hello1,hello2) { $scope. Hello = function () { Hello1.hello (); Hello2.hello (); } });This kind of injection method, need to set up a dependent array, the array is dependent on the service name, in the function parameters, you can set the parameter name arbitrarily, but must ensure the consistency of the order.
var myCtrl2 = function ($scope, Hello1,hello2) { $scope. Hello = function () { Hello1.hello (); Hello2.hello (); } } MyCtrl2. $injector = [' Hello1 ', ' Hello2 ']; App.controller ("MyCtrl2", MYCTRL2);This injection method directly passes two parameters, one is the name and the other is an array. The last parameter of this array is the true method body, and the others are dependent targets, but ensure that the parameter order of the method body is consistent (as with the tag injection).
App.controller ("MyCtrl3", [' $scope ', ' hello1 ', ' Hello2 ', function ($scope, Hello1,hello2) { $scope. Hello = function () { Hello1.hello (); Hello2.hello (); } }]);angular.injector()var $injector = Angular.injector ();
through $injector.get(‘serviceName‘) get a dependent service name
$injector. Get (' $scope ')By $injector.annotate(‘xxx‘) getting all the dependencies of XXX
Back to the top sample code$injector. Annotate (XXX)
<HTML><Head> <Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8" /> <Scriptsrc= "Http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></Script></Head><BodyNg-app= "MYAPP"> <DivNg-controller= "MYCTRL1"> <inputtype= "button"Ng-click= "Hello ()"value= "CTRL1"></input> </Div> <DivNg-controller= "MyCtrl2"> <inputtype= "button"Ng-click= "Hello ()"value= "Ctrl2"></input> </Div> <DivNg-controller= "MyCtrl3"> <inputtype= "button"Ng-click= "Hello ()"value= "Ctrl3"></input> </Div> <Scripttype= "Text/javascript"> varapp=Angular.module ("myApp",[]); App.factory ("Hello1",function(){ return{hello:function() {Console.log ("Hello1 Service"); } } }); App.factory ("Hello2",function(){ return{hello:function() {Console.log ("Hello2 Service"); } } }); var$injector=Angular.injector (); Console.log (Angular.equals ($injector. Get ('$injector') , $injector));//trueConsole.log (Angular.equals ($injector. Invoke (function($injector) {return$injector;}), $injector));//true //inferred //$injector. Invoke (function (ServiceA) {});App.controller ("MYCTRL1", function($scope, Hello1,hello2) {$scope. Hello= function() {Hello1.hello (); Hello2.hello (); } }); //Annotated //function Explicit (servicea) {}; //explicit. $inject = [' ServiceA ']; //$injector. Invoke (Explicit); varMyCtrl2= function($scope, Hello1,hello2) {$scope. Hello= function() {Hello1.hello (); Hello2.hello (); }} myCtrl2. $injector= ['Hello1','Hello2']; App.controller ("MyCtrl2", MYCTRL2); //inlineApp.controller ("MyCtrl3",['$scope','Hello1','Hello2',function($scope, Hello1,hello2) {//App.controller ("MyCtrl3", [' $scope ', ' hello1 ', ' Hello2 ', function (a,b,c) { //A.hello = function () { //B.hello (); //C.hello (); // }$scope. Hello= function() {Hello1.hello (); Hello2.hello (); } }]); Console.log ($injector. Annotate (MYCTRL2));//["$scope", "Hello1", "Hello2"] </Script></Body></HTML>
AngularJS API's $injector----Dependency Injection
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