AngularJS的$timeout和$interval服务使用

AngularJS的$timeout和$interval服务使用

记录AngularJS中两个关于定时器相关service的使用，其中$timeoute为触发一次，$interval为循环 触发，这两个服务分别对应JS中的setTimeout和setInterval函数（同属于window对象）。

$timeoute

设定定时时间，触发时间到，触发回调函数。

注入服务

var myapp = angular.module("myapp", []);

myapp.controller("MyController", function($scope, $timeout){

});

回调

var myapp = angular.module("myapp", []);

myapp.controller("MyController", function($scope, $timeout){

    $timeout(callAtTimeout, 3000);

});

function callAtTimeout() {
    console.log("Timeout occurred");
}

$interval

设定定时时间，触发时间到，循环触发回调函数。

注入服务

var myapp = angular.module("myapp", []);

myapp.controller("MyController", function($scope, $interval){

});

回调

var myapp = angular.module("myapp", []);

myapp.controller("MyController", function($scope, $interval){

    $interval(callAtInterval, 5000);

});

function callAtInterval() {
    console.log("Interval occurred");
}

实例

<script>
  angular.module('intervalExample', [])
    .controller('ExampleController', ['$scope', '$interval',
      function($scope, $interval) {
        $scope.format = 'M/d/yy h:mm:ss a';
        $scope.blood_1 = 100;
        $scope.blood_2 = 120;

        var stop;
        $scope.fight = function() {
          // Don't start a new fight if we are already fighting
          if ( angular.isDefined(stop) ) return;

          stop = $interval(function() {
            if ($scope.blood_1 > 0 && $scope.blood_2 > 0) {
              $scope.blood_1 = $scope.blood_1 - 3;
              $scope.blood_2 = $scope.blood_2 - 4;
            } else {
              $scope.stopFight();
            }
          }, 100);
        };

        $scope.stopFight = function() {
          if (angular.isDefined(stop)) {
            $interval.cancel(stop);
            stop = undefined;
          }
        };

        $scope.resetFight = function() {
          $scope.blood_1 = 100;
          $scope.blood_2 = 120;
        };

        $scope.$on('$destroy', function() {
          // Make sure that the interval is destroyed too
          $scope.stopFight();
        });
      }])
    // Register the 'myCurrentTime' directive factory method.
    // We inject $interval and dateFilter service since the factory method is DI.
    .directive('myCurrentTime', ['$interval', 'dateFilter',
      function($interval, dateFilter) {
        // return the directive link function. (compile function not needed)
        return function(scope, element, attrs) {
          var format,  // date format
              stopTime; // so that we can cancel the time updates

          // used to update the UI
          function updateTime() {
            element.text(dateFilter(new Date(), format));
          }

          // watch the expression, and update the UI on change.
          scope.$watch(attrs.myCurrentTime, function(value) {
            format = value;
            updateTime();
          });

          stopTime = $interval(updateTime, 1000);

          // listen on DOM destroy (removal) event, and cancel the next UI update
          // to prevent updating time after the DOM element was removed.
          element.on('$destroy', function() {
            $interval.cancel(stopTime);
          });
        }
      }]);
</script>

<div>
  <div ng-controller="ExampleController">
    <label>Date format: <input ng-model="format"></label> <hr/>
    Current time is: <span my-current-time="format"></span>
    <hr/>
    Blood 1 : <font color='red'>{{blood_1}}</font>
    Blood 2 : <font color='red'>{{blood_2}}</font>
    <button type="button" data-ng-click="fight()">Fight</button>
    <button type="button" data-ng-click="stopFight()">StopFight</button>
    <button type="button" data-ng-click="resetFight()">resetFight</button>
  </div>
</div>

参考: 1.官方$interval文档