[AngularJS] $interval

最新推荐文章于 2025-09-08 17:59:21 发布

转载最新推荐文章于 2025-09-08 17:59:21 发布 · 84 阅读

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原文链接：http://www.cnblogs.com/Answer1215/p/4114651.html

文章标签：

#javascript #ViewUI

本文详细介绍了AngularJS中的$interval服务，该服务提供定时操作功能并具有强大的灵活性。文章通过实例展示了如何使用$interval进行定时任务，并结合AngularJS的视图周期，实现了取消定时器、处理异步请求等功能。

$interval provides an excellent service for timed operations in your AngularJS apps. It has the advantage over setInterval in "normal" Javascript in that it is aware of Angular's view cycles, as well as being mockable for unit tests. Additionally, it returns a promise and provides a lot of flexibility.

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <script src="bower_components/angular/angular.min.js"></script>
    <script src="app.js"></script>
</head>
<body ng-app="app" ng-controller="AppCtrl as app">
    <button ng-click="app.cancel();">cancel</button>
</body>
</html>

/**
 * Created by Answer1215 on 11/22/2014.
 */

function AppCtrl($q, $interval) {

    var vm = this;
    vm.cancel = cancel;
    vm.rejectIt = false;

    var timer = $interval(function(){
        vm.rejectIt = !vm.rejectIt;
        doAsync(vm.rejectIt).then(function(data){
            console.log(data.resolveData);
        }, function(error){
            console.log(error.rejectData);
        });
    }, 600, 10); // 600 ms, 10 times

    function doAsync(rejectIt){
        return $q(function(resolve, reject){
                var doneTime = +new Date();
                console.log(doneTime);
                if(!rejectIt){
                    resolve({
                        resolveData: 'resolve it at '+doneTime
                    });
                }else{
                    reject({
                        rejectData: 'reject it at '+doneTime
                    });
                }
        });
    }

    function success() {
        console.log("done");
    }

    function error() {
        console.log("cancelled or error");
    }

    function notify() {
        console.log("updating");
    }

    timer.then(success, error, notify);

    function cancel() {
        $interval.cancel(timer);
    }
}

angular.module('app',[])
    .controller('AppCtrl', AppCtrl);