如何清除或停止angularjs中的timeInterval？

Question

我正在做一个演示，我正在使用$interval定期的时间间隔从服务器获取数据。现在我需要停止/取消这个。

我该如何做到这一点？如果我需要重新启动流程，我应该怎么做？其次，我还有一个问题：我在时间间隔后从服务器获取数据。有没有必要使用$scope.apply或$scope.watch？

这里是我的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

可以存储由间隔返回的承诺，用$interval.cancel()这一承诺，这将取消这一承诺的时间间隔。要委派时间间隔的开始和停止，您可以创建start()和stop()函数，只要您想停止并从特定事件再次启动它们即可。我在下面创建了一个片段，通过在事件（例如ng-click）和控制器中使用事件的视图实现它来显示启动和停止时间间隔的基础知识。

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); 
     }); 
    };