如何prevent模型的变化侦听（以$手表绑定）调用的角度ngClick函数内 [英] how to prevent model-changes-listener (binded with $watch) invocation inside ngClick function in angular

问题描述

我有模式，我看这个模型的一些变化，在$绑定的手表功能。我有绑定到ngClick，谁改变模型的功能。我需要能够在ngClick prevent模型的侦听器调用，因为我不想要的轨道改变，但如果模型一些其他的方式改变，除了ngClick绑定功能，我想监听工作。

但我并不想解除听众，我只是希望它停止执行本目前的时刻。

例如：

  $ scope.AlertIfChange =功能（）{
 警报（'模式的变革！'）;
};$ scope.watch（型号，AlertIfChange，真正的）;$ scope.clickHandler =功能（）{
 $ scope.model =点击通过改变;
  - 有些东西prevent AlertIfChange调用 - 
};
 

解决方案

如果您需要在很多地方这个功能，考虑写这就像NG单击，但不会触发回调，直到特定的条件指令得到满足。

I have model, and I watch this model for some changes with functions binded in $watch. And I have function binded to ngClick, who change model. I need to be able to prevent model listener invocation in ngClick, because I don't want track that changes, but if model changed with some other way, except ngClick binded function, I want listeners work.

But I don't want to unbind listeners, I just want it to stop execution for this current moment.

example:

$scope.AlertIfChange = function(){
 alert('model changes!');
};

$scope.watch(model, AlertIfChange, true);

$scope.clickHandler = function(){
 $scope.model = "changed by click";
 -- some stuff to prevent AlertIfChange invocation --
};

解决方案

If you need this functionality in a lot of places, consider writing a directive which works like ng-click, but doesn't trigger the callback until a specific condition is met.

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