javascript 将参数从指令传递给控制器​​函数

Pass Arguments from directive to controller function

提问by C-Rad

I've seen lots of these questions but haven't found a solution that works. here is a fiddle that doesn't work but should.

我见过很多这样的问题，但还没有找到有效的解决方案。这是一个不起作用但应该的小提琴。

http://jsfiddle.net/cdparmeter/j2K7N/2/

http://jsfiddle.net/cdparmeter/j2K7N/2/

Controller:

控制器：

$scope.foo = function (textArray) {
    console.log(textArray)
};

Directive:

指示：

return {
    restrict: 'E',
    replace: 'true',
    scope: {
        methodToCall: '&method'
    },
    template: "<div>
        <input ng-model='textToPush'/>
        <button ng-click='pushText'>Push</button>
        <button ng-click='finish'>Finish</button>
    </div>",
    link: function (scope, element, attrs) {
        scope.paragraphs = [];
        scope.pushText = function () {
            scope.paragraphs.push(scope.pushText);
            scope.pushText = "";
        }
        scope.finish = function () {
            scope.methodToCall(scope.paragraphs)
        }
    }
}

HTML:

HTML：

<div ng-app="MyApp">
    <div ng-controller="MyController">
        <container data-method="foo">
    </div>
</div>

I'm building an array inside my directive that needs custom handling in the controller of the parent scope. I know I can throw a watch in the parent scope on a model I pass into my directive but that seems hackish and dirty. any suggestions?

我正在我的指令中构建一个数组，该数组需要在父作用域的控制器中进行自定义处理。我知道我可以在传递给我的指令的模型的父作用域中扔一块手表，但这看起来很黑很脏。有什么建议？

回答by Michael Benford

Before answering your question I must say that your script contains a few errors:

在回答您的问题之前，我必须说您的脚本包含一些错误：

1. You're binding the input to a variable called textToPush, and then using a different one inside the pushTextfunction (pushText);
2. You're not setting the ng-clickdirective correctly; it should be ng-click="pushText()"instead of ng-click="pushText". The same for finish;

1. 您将输入绑定到一个名为 的变量textToPush，然后在pushText函数 ( pushText) 中使用不同的变量；
2. 您没有ng-click正确设置指令；它应该ng-click="pushText()"代替ng-click="pushText". 相同的finish;

Now, back to your question. In order to call a function of the parent scope passing arguments, you can get a reference to that function first, and then execute it:

现在，回到你的问题。为了调用父作用域传递参数的函数，您可以先获取对该函数的引用，然后执行它：

scope.finish = function () {
  var func = scope.methodToCall();                
  func(scope.paragraphs);
}

Here's a working versionof your script.

这是您的脚本的工作版本。

You could also do this, if you prefer:

如果您愿意，也可以这样做：

scope.finish = function () {
    scope.methodToCall({value: scope.paragraphs});                                
}

But for this code to work you should change your markup to:

但是要使此代码正常工作，您应该将标记更改为：

<container data-method="foo(value)"/>

Here's another jsFiddleshowing the solution above.

这是另一个显示上述解决方案的jsFiddle。