1、问题背景
设置一个定时器，给定两个变量startData和endData，计时开始后分别减去5和50；单击停止暂停定时器，重置后数据恢复到原来的数据。
2、实现源码
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>AngularJS停止定时器</title>
<script src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js"></script>
<script>
var app = angular.module("intervalApp",[]);
app.controller("intervalController",["$scope","$interval",function($scope,$interval){
$scope.startData = 100;
$scope.endData = 1000;
var stopEvent;
$scope.startEvent = function(){
if(angular.isDefined(stopEvent)) return;
stopEvent = $interval(function(){
if($scope.startData > 50 && $scope.endData > 500)
{
$scope.startData = $scope.startData - 5;
$scope.endData = $scope.endData - 50;
}
else
{
$scope.stopClick();
}
},1000)
};
$scope.stopClick = function(){
if(angular.isDefined(stopEvent))
{
$interval.cancel(stopEvent);
stopEvent = undefined;
}
};
$scope.resetEvent = function(){
$scope.startData = 100;
$scope.endData = 1000;
};
$scope.$on("$destory",function(){
$scope.stopClick();
});
}]);
</script>
</head>
<body ng-app="intervalApp">
<div ng-controller="intervalController">
<button data-ng-click="startEvent()">开始</button>
<button data-ng-click="stopClick()">停止</button>
<button data-ng-click="resetEvent()">重置</button><br>
<div>开始数据：{{startData}}</div><br>
<div>结束数据：{{endData}}</div><br>
</div>
</body>
</html>
3、实现结果
（1）初始化
（2）点击开始
（3）点击停止
（4）点击重置
