如何在 AngularJS 中监听单击并按住? [英] How can I listen for a click-and-hold in AngularJS?

问题描述

我制作了一个时间计数器，您可以通过单击按钮来增加或减少时间.然而，我希望当我点击并按住按钮时，时间的值会不断攀升.

所以目前如果你每次点击向上按钮时看到我的 Plunkr增加，但我想要这个，所以当我按住按钮时，值会增加 1,2,3,4,5,6,7,8 直到我松开按钮.

我怎样才能实现这样的目标?

解决方案

DEMO

{{ 时间 |时间过滤器 }}<div class="btn-group btn-group-sm"><button class="btn btn-default" ng-mousedown='mouseDown()' ng-mouseup="mouseUp()"><i class="fa fa-caret-up"></i><button class="btn btn-default" ng-click="Time = Time - 1"><i class="fa fa-caret-down"></i>

在 $interval 中使用 ng-mouseDown 和 ng-mouseup 指令

app.directive('time', function ($interval) {返回 {templateUrl: 'time.html',限制:'E'，范围: {时间:'=值'},链接:函数(范围、元素、属性){element.addClass('时间');无功承诺；scope.mouseDown = 函数(){如果(承诺){$interval.cancel(承诺)；}承诺 = $interval(function () {范围.时间++；}, 100);};scope.mouseUp = 函数 () {$interval.cancel(承诺)；承诺=空；};}};});

I have made a time conter which allows you to increase or decrease the time by clicking a button. I would like however that when I click and hold the button the value of the time would keep climbing.

So currently if you see my Plunkr each time I click the up button the value increases but I want this so when I hold the button down the value increases 1,2,3,4,5,6,7,8 until I release the button.

How could I achieve something like this?

解决方案

DEMO

<span class="time">{{ Time | timeFilter }}</span>
<div class="btn-group btn-group-sm">
  <button class="btn btn-default" ng-mousedown='mouseDown()' ng-mouseup="mouseUp()">
    <i class="fa fa-caret-up"></i>
  </button>
  <button class="btn btn-default" ng-click="Time = Time - 1">
    <i class="fa fa-caret-down"></i>
  </button>
</div>

Use ng-mouseDown and ng-mouseup directive with $interval

app.directive('time', function ($interval) {
   return {
      templateUrl: 'time.html',
      restrict: 'E',
      scope: {
        Time: '=value'
      },
      link: function (scope, element, attrs) {
        element.addClass('time');

        var promise;      
        scope.mouseDown = function() {
          if(promise){
             $interval.cancel(promise);
          }
          promise = $interval(function () { 
            scope.Time++;
          }, 100);

        };

        scope.mouseUp = function () {
           $interval.cancel(promise);
           promise = null;
        };
     }
  };
});

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