如何清除或停止angularjs中的timeInterval？

Question

我正在做一個演示，我正在使用$interval定期的時間間隔從服務器獲取數據。現在我需要停止/取消這個。

我該如何做到這一點？如果我需要重新啓動流程，我應該怎麼做？其次，我還有一個問題：我在時間間隔後從服務器獲取數據。有沒有必要使用$scope.apply或$scope.watch？

這裏是我的plunker：

app.controller('departureContrl',function($scope,test, $interval){ 
    setData(); 

    $interval(setData, 1000*30); 

    function setData(){ 
     $scope.loading=true; 
    test.stationDashBoard(function(data){ 
     console.log(data); 
     $scope.data=data.data; 
     $scope.loading=false; 
     //alert(data); 
    },function(error){ 
     alert('error') 
    }) ; 

    } 
}); 

http://plnkr.co/edit/ly43m5?p=preview

Answer 1

可以存儲由間隔返回的承諾，用$interval.cancel()這一承諾，這將取消這一承諾的時間間隔。要委派時間間隔的開始和停止，您可以創建start()和stop()函數，只要您想停止並從特定事件再次啓動它們即可。我在下面創建了一個片段，通過在事件（例如ng-click）和控制器中使用事件的視圖實現它來顯示啓動和停止時間間隔的基礎知識。

angular.module('app', []) 
 

 
    .controller('ItemController', function($scope, $interval) { 
 
    
 
    // store the interval promise in this variable 
 
    var promise; 
 
    
 
    // simulated items array 
 
    $scope.items = []; 
 
    
 
    // starts the interval 
 
    $scope.start = function() { 
 
     // stops any running interval to avoid two intervals running at the same time 
 
     $scope.stop(); 
 
     
 
     // store the interval promise 
 
     promise = $interval(setRandomizedCollection, 1000); 
 
    }; 
 
    
 
    // stops the interval 
 
    $scope.stop = function() { 
 
     $interval.cancel(promise); 
 
    }; 
 
    
 
    // starting the interval by default 
 
    $scope.start(); 
 
    
 
    // stops the interval when the scope is destroyed, 
 
    // this usually happens when a route is changed and 
 
    // the ItemsController $scope gets destroyed. The 
 
    // destruction of the ItemsController scope does not 
 
    // guarantee the stopping of any intervals, you must 
 
    // be responsible for stopping it when the scope is 
 
    // is destroyed. 
 
    $scope.$on('$destroy', function() { 
 
     $scope.stop(); 
 
    }); 
 
      
 
    function setRandomizedCollection() { 
 
     // items to randomize 1 - 11 
 
     var randomItems = parseInt(Math.random() * 10 + 1); 
 
     
 
     // empties the items array 
 
     $scope.items.length = 0; 
 
     
 
     // loop through random N times 
 
     while(randomItems--) { 
 
     
 
     // push random number from 1 - 10000 to $scope.items 
 
     $scope.items.push(parseInt(Math.random() * 10000 + 1)); 
 
     } 
 
    } 
 
    
 
    });

<div ng-app="app" ng-controller="ItemController"> 
 
    
 
    <!-- Event trigger to start the interval --> 
 
    <button type="button" ng-click="start()">Start Interval</button> 
 
    
 
    <!-- Event trigger to stop the interval --> 
 
    <button type="button" ng-click="stop()">Stop Interval</button> 
 
    
 
    <!-- display all the random items --> 
 
    <ul> 
 
    <li ng-repeat="item in items track by $index" ng-bind="item"></li> 
 
    </ul> 
 
    <!-- end of display --> 
 
</div> 
 

 
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

Answer 2

var interval = $interval(function() { 
    console.log('say hello'); 
}, 1000); 

$interval.cancel(interval); 

Answer 3

var promise = $interval(function(){ 
    if($location.path() == '/landing'){ 
     $rootScope.$emit('testData',"test"); 
     $interval.cancel(promise); 
    } 
},2000); 

Answer 4

$scope.toggleRightDelayed = function(){ 
     var myInterval = $interval(function(){ 
      $scope.toggleRight(); 
     },1000,1) 
     .then(function(){ 
      $interval.cancel(myInterval); 
     }); 
    };