javascript 如何在 AngularJS 中监听单击并按住？
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How can I listen for a click-and-hold in AngularJS?
提问by Daimz
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.
我制作了一个时间计数器，它允许您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。
So currently if you see my Plunkreach time I click the up button the value increases but I want this so when I hold the button down the value increases 1,2,3,4,5,6,7,8until I release the button.
因此，目前，如果每次我单击向上按钮时都会看到我的Plunkr，则该值会增加，但我希望如此，因此当我按住按钮时，该值会增加，1,2,3,4,5,6,7,8直到我松开按钮。
How could I achieve something like this?
我怎么能做到这样的事情？
回答by Darshan P
<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
在 $interval 中使用 ng-mouseDown 和 ng-mouseup 指令
app.directive('time', function ($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;
};
}
};
});
