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

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

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

});

回调

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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

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

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

});

回调

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

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

$interval(callAtInterval, 5000);

});

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

实例

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<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

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