我想创建一个秒表.我用Google搜索并获得了一些关于如何制作计时器的提示.这是我在我的控制器中所做的：
$scope.value = 0;
$scope.startTimer = function() {
$scope.value = 0;
var change = function() {
$scope.value += 1000;
$timeout(change,1000);
};
$timeout(change,1000);
}
并以我的html显示这种格式的值：
<label>{{value | date: 'hh:mm:ss'}}</label>
问题是时钟始终在04:00:00开始,当我调用startTimer()函数时,它启动计时器没问题,但我希望计时器如下：
00:00:00
00:00:01
00:00:02
….
谁能告诉我如何在00:00:00启动计时器？
已编辑：使用间隔计时器更新了代码,因此现在代码包含$timeout和$interval的计时器.
在这里,你自己做过滤器：
在这里,你自己做过滤器：
var app = angular.module("myApp",[]);
app.controller("myController",function($scope,$timeout,$interval){
//timer with timeout
$scope.timerWithTimeout = 0;
$scope.startTimerWithTimeout = function() {
$scope.timerWithTimeout = 0;
if($scope.myTimeout){
$timeout.cancel($scope.myTimeout);
}
$scope.onTimeout = function(){
$scope.timerWithTimeout++;
$scope.myTimeout = $timeout($scope.onTimeout,1000);
}
$scope.myTimeout = $timeout($scope.onTimeout,1000);
};
$scope.resetTimerWithTimeout = function(){
$scope.timerWithTimeout = 0;
$timeout.cancel($scope.myTimeout);
}
//timer with interval
$scope.timerWithInterval = 0;
$scope.startTimerWithInterval = function() {
$scope.timerWithInterval = 0;
if($scope.myInterval){
$interval.cancel($scope.myInterval);
}
$scope.onInterval = function(){
$scope.timerWithInterval++;
}
$scope.myInterval = $interval($scope.onInterval,1000);
};
$scope.resetTimerWithInterval = function(){
$scope.timerWithInterval = 0;
$interval.cancel($scope.myInterval);
}
})
app.filter('hhmmss',function () {
return function (time) {
var sec_num = parseInt(time,10); // don't forget the second param
var hours = Math.floor(sec_num / 3600);
var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
var seconds = sec_num - (hours * 3600) - (minutes * 60);
if (hours < 10) {hours = "0"+hours;}
if (minutes < 10) {minutes = "0"+minutes;}
if (seconds < 10) {seconds = "0"+seconds;}
var time = hours+':'+minutes+':'+seconds;
return time;
}
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myController">
<label>Timer with timeout: {{timerWithTimeout | hhmmss}}</label>
<button ng-click="startTimerWithTimeout()">Start Timer</button>
<button ng-click="resetTimerWithTimeout()">reset tiemr</button>
<br><br>
<label>Timer with interval: {{timerWithInterval | hhmmss}}</label>
<button ng-click="startTimerWithInterval()">Start Timer</button>
<button ng-click="resetTimerWithInterval()">reset tiemr</button>
</div>
增加：对于计时器,最好使用$interval而不是$timeout.并始终将$interval引用到某个变量：$scope.timer = $interval(change,1000);,所以你可以在每次重置时销毁它：$interval.cancel($scope.timer); .
