我怎样才能在几分钟内进行 angular 倒计时？

Question

这是我的代码，但我找不到如何在几分钟内进行倒计时，我的意思是，不是 3000，30:00...有什么帮助吗？

  <script>
  app.controller("Counter", function($scope,$timeout){
    $scope.counter = 3000;
    $scope.onTimeout = function(){
        $scope.counter--;
        mytimeout = $timeout($scope.onTimeout,1000);
    }
    var mytimeout = $timeout($scope.onTimeout,1000);
});
 </script>

Answer 1

这是一个简单的例子。

查看：

<div ng-controller="countCtrl">
<span>{{30 - secondsPassed/60}}:{{59 - secondsPassed%60}}</span>
<button ng-click="startTimer()">Click me to start the timer</button>
</div>

控制器：

.controller('countCtrl', function($scope, $interval){
 $scope.secondsPassed = 0;
 var ref;

 $scope.startTimer = function(){
  //Clean interval instance if button clicked multiple times.
  $interval.cancel(ref);
  $scope.secondsPassed = 0;
  ref = $interval(function(){
   $scope.secondsPassed++;
   if($scope.secondsPassed >= 30 * 60){
    //Clean interval instance if we passed the 30 min mark.
    $interval.cancel(ref);
   }
  }, 1000);
 };

 //Clean the interval instance if scope destroyed
 $scope.$on('$destroy', function(){
  $interval.cancel(ref);
 });
});

Answer 2

你的控制器没问题，你只需要：

将 3000 更改为 1800（30 分钟为 1800 秒）。
在递减 counter 之前添加条件以避免掉头： if ($scope.counter > 0) $scope.counter--;

现在显示秒数 'mm:ss' 将计数器转换为日期。您可以使用过滤器（从这个）

app.filter('secondsToDateTime', [function() {
    return function(seconds) {
        return new Date(1970, 0, 1).setSeconds(seconds);
    };
}])

然后这样显示：

{{counter | secondsToDateTime | date:'mm:ss'}}

在 fiddle 或下面的代码片段中查看其工作原理。

var myApp = angular.module('myApp', []);

function MyCtrl($scope, $timeout) {
  $scope.counter = 1800;
  $scope.onTimeout = function() {
    if ($scope.counter > 0) $scope.counter--;
    mytimeout = $timeout($scope.onTimeout, 1000);
  }
  var mytimeout = $timeout($scope.onTimeout, 1000);
}

myApp.filter('secondsToDateTime', [function() {
  return function(seconds) {
    return new Date(1970, 0, 1).setSeconds(seconds);
  };
}])

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.9/angular.min.js"></script>
<div ng-app="myApp" ng-controller="MyCtrl">
  {{counter | secondsToDateTime | date:'mm:ss'}}
</div>

Answer 3

以上答案会在 00:00 秒后重置时间并再次从 59:59 开始倒计时。

i have changed the answer to stop once reached 00:00

app.controller('fiveCtrl', function ($scope, $timeout) {
  $scope.counter = 3000;
  $scope.onTimeout = function () {
    if ($scope.counter == 0) {
        $scope.counter = 0;
    }
    else{
        $scope.counter--;
        mytimeout = $timeout($scope.onTimeout, 1000);
    }       
 }
 var mytimeout = $timeout($scope.onTimeout, 1000);
});


app.filter('secondsToDateTime', [function() {
       return function(seconds) {
    return new Date(1970, 0, 1).setSeconds(seconds);
   };
}])

the Html would be

  <div ng-controller="fiveCtrl">
   <b> Test time Left : {{counter | secondsToDateTime | date:'mm:ss'}}</b> 
     <div ng-show="counter<60 && counter!=0"> Test expires in {{counter}} seconds</div>
     <div ng-show="counter==0"> Test expired : {{counter}} seconds left</div>
  </div>

我怎样才能在几分钟内进行 angular 倒计时？

how can i make an angular countdown in minutes?

javascript

angularjs

countdown