在 angular 中,如何对用户事件(如页面更改)使用取消 $interval? [英] In angular, how to use cancel an $interval on user events, like page change?
问题描述
Angular 文档关于 $interval
说:
注意:此服务创建的时间间隔必须在您完成后显式销毁.
但它没有解释如何销毁 $interval.
例如,如果我有一个包含此代码的指令:
$interval(function() {for (var i in myArray) {//做一些事情}}, 5000);
例如,当用户更改页面时,我如何销毁它?
每当用户更改页面时,与路由控制器关联的作用域(下例中的/page1
)将变为发送了一个$destroy
事件.您可以在该事件的侦听器中cancel
$interval
:
app.config(function ($routeProvider) {$routeProvider.when('/page1', {模板:'页面内容',控制器:页面控制器});//...});函数 PageController($scope, $interval) {var intervalPromise = $interval(function () {/* ... */}, 5000);$scope.$on('$destroy', function () { $interval.cancel(intervalPromise); });}
Angular documentation about $interval
is saying :
Note: Intervals created by this service must be explicitly destroyed when you are finished with them.
but it's not explaining how to destroy the $interval.
If for example I have a directive containing this code :
$interval(function() {
for (var i in myArray) {
// do domething
}
}, 5000);
How can i destroy it when the user changes the page for example?
Whenever the user changes the page, the scope associated with the controller of the route (/page1
in the example below) will be sent a $destroy
event. You can cancel
that $interval
in a listener to that event:
app.config(function ($routeProvider) {
$routeProvider.when('/page1', {
template: '<div>Page Content</div>',
controller: PageController
});
// ...
});
function PageController($scope, $interval) {
var intervalPromise = $interval(function () { /* ... */ }, 5000);
$scope.$on('$destroy', function () { $interval.cancel(intervalPromise); });
}
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