推断式注入这种注入方式,需要在保证参数名称与服务名称相同。如果代码要经过压缩等操作,就会导致注入失败。
app.controller("myCtrl1", function($scope,hello1,hello2){$scope.hello = function(){hello1.hello();hello2.hello();}});
标记式注入这种注入方式,需要设置一个依赖数组,数组内是依赖的服务名字,在函数参数中,可以随意设置参数名称,但是必须保证顺序的一致性。
var myCtrl2 = function($scope,hello1,hello2){$scope.hello = function(){hello1.hello();hello2.hello();}}myCtrl2.$injector = ["hello1","hello2"];app.controller("myCtrl2", myCtrl2);
内联式注入这种注入方式直接传入两个参数,一个是名字,另一个是一个数组。这个数组的最后一个参数是真正的方法体,其他的都是依赖的目标,但是要保证与方法体的参数顺序一致(与标记注入一样)。
app.controller("myCtrl3",["$scope","hello1","hello2",function($scope,hello1,hello2){$scope.hello = function(){hello1.hello();hello2.hello();}}]);
$injector常用的方法在angular中,可以通过angular.injector()获得注入器。
var $injector = angular.injector();通过$injector.get("serviceName")获得依赖的服务名字
$injector.get("$scope")通过$injector.annotate("xxx")获得xxx的所有依赖项
$injector.annotate(xxx)样例代码
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script></head><body ng-app="myApp"><div ng-controller="myCtrl1"><input type="button" ng-click="hello()" value="ctrl1"></input></div><div ng-controller="myCtrl2"><input type="button" ng-click="hello()" value="ctrl2"></input></div><div ng-controller="myCtrl3"><input type="button" ng-click="hello()" value="ctrl3"></input></div><script type="text/javascript">var app = 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"];// $injector.invoke(explicit);var myCtrl2 = function($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>
以上就是对AngularJS injector的资料整理,后续继续补充相关资料,谢谢大家对本站的支持!