Question

我希望能够每秒（或更快）重复调用一个函数。假设“startdate”包含文本中的开始日期......在我的控制器中：

scope.arrayoftimes=[{time:XXXX},{time:XXXXXX}]
scope.startdate = $('#startingdate'); //start date comes from text in an element
scope.speed = 1000;
scope.index = 0;

scope.timer = $timeout(scope.doSomething(), scope.speed);

scope.doSomething = function() {
    var currentTime = scope.startDate.html();
    for (var i=scope.index; i < scope.arrayoftimes.length; i++) {
         if(currentTime == roundTo(scope.arrayoftimes[i].time)) {
               $rootScope.$emit('timeMatch', scope.index);
               scope.index++;
               break;
         }
    }

    $timeout(scope.doSomething(), scope.speed);

}

上面的代码会在执行时释放我的浏览器。但是，如果我在scope.index ++之后或if条件内的任何地方坚持“警报”，那么它工作正常（只要我检查“防止打开多个对话框”）

scope.arrayoftimes=[{time:XXXX},{time:XXXXXX}]
scope.startdate = "//Insert Starting Date Here"
scope.speed = 1000;
scope.index = 0;

scope.timer = $timeout(scope.doSomething(), scope.speed);

scope.doSomething = function() {
    var currentTime = scope.startDate;
    for (var i=scope.index; i < scope.arrayoftimes.length; i++) {
         if(currentTime == roundTo(scope.arrayoftimes[i].time)) {
               $rootScope.$emit('timeMatch', scope.index);
               scope.index++;
               alert("alert"); // the existence of this alert message and checking prevent from opening more dialog boxes in chrome allows this to execute fine without freezing
               break;
         }
    }

    $timeout(scope.doSomething(), scope.speed);

}

发生了什么事？我怎么能绕过这个？有更好的方法吗？

Answer 1

您的超时呼叫可能需要：

$timeout(function() { scope.doSomething(); }, scope.speed);

或

$timeout(scope.doSomething, scope.speed);

否则，您将立即执行doSomething（），从而导致无限循环。

Angularjs使用$ settimeout在循环中冻结，以便在或不到一秒之后连续多次调用函数？

1 个答案: