调用后在angularjs中解除绑定$ watch [英] Unbinding $watch in angularjs after called

问题描述

我知道您可以这样取消$ watch的绑定:

I know you can unbind a $watch like this:

var listener = $scope.$watch("tag", function () {});
// ...
listener(); // would clear the watch

但是您可以在watch函数声明中取消绑定手表吗?因此，在手表执行一次后，它会自行解除捆绑吗?像这样:

but can you unbind the watch within the watch function declaration. So after the watch gets executed once, it unbinds itself? Something like:

$scope.$watch("tag", function () {
    unbindme()
});

推荐答案

您可以按照已经执行的方法进行操作，在函数内部调用"deregistration":

you can just do it the same way you already do, call the "deregistration" inside your function:

var unbind = $scope.$watch("tag", function () {
    // ...
    unbind();
});

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