ng型改变时角度变化不发射 [英] Angular - ng-change not firing when ng-model is changed

问题描述

输入如下：

<input type="text" ng-model="repair.test"  ng-change="action()" />

当我执行了 action（）手动输入并更改输入。但是，如果我通过一些其他功能以编程方式更改了repair.test值，则不会触发ng-change的动作。我已经阅读了角度教程，这可能是预期的行为。

The action() is executed when I manually type and change the input. However if I change the repair.test value by some other function programmatically, it doesnt fire the ng-change's action. I have read the angular tutorial and it's probably the expected behavior.

https://docs.angularjs.org/api/ng/directive/ngChange

当值更改即将到来时，不会对表达式进行评估从模型。 - 我也需要这个。
当模型以任何方式改变时，我如何在控制器中启动一个动作？ （输入输入或任何其他功能）

"The expression is not evaluated when the value change is coming from the model." <- I need this too. How can I fire an action in controller, when the model changes in any way? (typing in input or by any other function)

感谢您的帮助。

编辑：

模型值实际上是表单$ valid ，它有它自己的Form控制器（我认为），那个是为什么我使用action函数来尝试将值传递给父控制器。所以 $ scope。$ watch 此时不起作用，只有当它被初始化时。

The model value is actually the form.$valid, which has it's own Form controller around it (I think), that is why I used the action function to try to pass the value to the parent controller. So $scope.$watch at the moment doesn't work, only when it is initialised.

推荐答案

ngChange 只是为了输入，如果你想听这个模型做这样的

ngChange is just for the input, if you want to listen the model do like this

$scope.$watch('repair.test', function(newvalue,oldvalue) {

            });

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