使用AngularJS，我如何注入一个控制器在另一个控制器中使用？
我有以下片段：
var app = angular.module("testApp",['']);
app.controller('TestCtrl1',['$scope',function ($scope) {
$scope.myMethod = function () {
console.log("TestCtrl1 - myMethod");
}
}]);
app.controller('TestCtrl2','TestCtrl1',function ($scope,TestCtrl1) {
TestCtrl1.myMethod();
}]);@H_404_6@
当我执行这个，我得到的错误：
Error: [$injector:unpr] Unknown provider: TestCtrl1Provider <- TestCtrl1
http://errors.angularjs.org/1.2.21/$injector/unpr?p0=TestCtrl1Provider%20%3C-%20TestCtrl1@H_404_6@
我应该甚至试图使用另一个控制器里面的控制器，或者我应该使这个服务？
例如：
//some container component that provides a wizard and transcludes the page components displayed in a wizard
myModule.component('wizardContainer',{
...,controller : function WizardController() {
this.disableNext = function() {
//disable next step... some implementation to disable the next button hosted by the wizard
}
},...
});
//some child component
myModule.component('onboardingStep',{
...,controller : function OnboadingStepController(){
this.$onInit = function() {
//.... you can access this.container.disableNext() function
}
this.onChange = function(val) {
//..say some value has been changed and it is not valid i do not want wizard to enable next button so i call container's disable method i.e
if(notIsValid(val)){
this.container.disableNext();
}
}
},...,require : {
container: '^^wizardContainer' //Require a wizard component's controller which exist in its parent hierarchy.
},...
});@H_404_6@
现在这些上述组件的使用可能是这样的：
<wizard-container ....>
<!--some stuff-->
...
<!-- some where there is this page that displays initial step via child component -->
<on-boarding-step ...>
<!--- some stuff-->
</on-boarding-step>
...
<!--some stuff-->
</wizard-container>@H_404_6@
(no prefix) – Locate the required controller on the current element. Throw an error if not found.
? – Attempt to locate the required controller or pass null to the link fn if not found.
^ – Locate the required controller by searching the element and its parents. Throw an error if not found.
^^ – Locate the required controller by searching the element’s parents. Throw an error if not found.
?^ – Attempt to locate the required controller by searching the element and its parents or pass null to the link fn if not found.
?^^ – Attempt to locate the required controller by searching the element’s parents,or pass null to the link fn if not found.
老答案：
您需要注入$controller服务以在另一个控制器中实例化控制器。但请注意，这可能会导致一些设计问题。您可以随时创建遵循单一职责的可重用服务，并根据需要将它们注入到控制器中。
例：
app.controller('TestCtrl2','$controller',$controller) {
var testCtrl1viewmodel = $scope.$new(); //You need to supply a scope while instantiating.
//Provide the scope,you can also do $scope.$new(true) in order to create an isolated scope.
//In this case it is the child scope of this scope.
$controller('TestCtrl1',{$scope : testCtrl1viewmodel });
testCtrl1viewmodel.myMethod(); //And call the method on the newScope.
}]);@H_404_6@
在任何情况下，您不能调用TestCtrl1.myMethod()，因为您已将方法附加在$ scope上，而不是在控制器实例上。
如果你是共享控制器，那么总是更好的做：
.controller('TestCtrl1',['$log',function ($log) {
this.myMethod = function () {
$log.debug("TestCtrl1 - myMethod");
}
}]);@H_404_6@
和消费do：
.controller('TestCtrl2',$controller) {
var testCtrl1viewmodel = $controller('TestCtrl1');
testCtrl1viewmodel.myMethod();
}]);@H_404_6@
在第一种情况下，真正的$ scope是你的视图模型，在第二种情况下它是控制器实例本身。
