AngularJS:清除 $watch [英] AngularJS : Clear $watch

问题描述

我的 AngularJS 应用程序中有一个监视功能.

I have a watch function in my AngularJS application.

$scope.$watch('quartzCrystal', function () {
   ...
}

但是，在某些情况下(在我的示例中，在我的单页应用程序中更改页面)我想要停止那个手表(就像清除超时一样).

However, after some condition (in my example, changing the page at my single-page application) I want to stop that watch (as like clearing timeout).

我该怎么做?

推荐答案

$watch 返回一个注销函数.调用它会注销 $watcher.

$watch returns a deregistration function. Calling it would deregister the $watcher.

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

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