[AngularJS] $interval

本文轉載自查看原文 2014-11-22 06:49 2150 AngularJS

$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);

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