AngularJS控制器和方法 [英] AngularJS controller and methods

问题描述

我是angularjs的初学者，有几个关于控制器的问题。

这是我的示例控制器：

I'm a beginner in angularjs with a few questions about controllers.
Here's my example controller:

function exampleController($scope)
{
   $scope.sampleArray = new Array();

   $scope.firstMethod = function()
   {
      //initialize the sampleArray
   };

   $scope.secondMethod = function()
   {
      this.firstMethod();
   };
};

以下是我的问题：

• 如何从 secondMethod 中调用 firstMethod ？我的方式是正确的，还是更好的方式？


• 如何为控制器创建构造函数？我需要调用调用初始化sampleArray的firstMethod的secondMethod？


• 如何从html代码调用特定方法？我发现ng-initialize但我无法弄清楚如何使用它。

• How I can call firstMethod from secondMethod? Is the way I did it correct, or is better way?
• How I can create a constructor for the controller? I need to call the secondMethod that call the firstMethod that initialize the sampleArray?
• How I can call a specific method from html code? I found ng-initialize but I can't figure out how to use it.

推荐答案

您以与声明方法相同的方式调用方法：

You call a method the same way you declared it:

$scope.secondMethod = function() {
  $scope.firstMethod();
};

您也可以通过HTML调用：

Which you can also call from HTML like so:

<span>{{secondMethod()}}</span>

但是控制器实际上没有构造函数 - 它们通常就像函数一样使用。但是你可以在你的控制器函数中进行初始化，它最初会被执行，就像构造函数一样：

But controllers don't really have "constructors" - they're typically used just like functions. But you can place initialization in your controller function and it will be executed initially, like a constructor:

function exampleController($scope) {
  $scope.firstMethod = function() {
    //initialize the sampleArray
  };

  $scope.secondMethod = function() {
    $scope.firstMethod();
  };

  $scope.firstMethod();
}

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