我正在尝试使用AngularJS创建twitter bootstrap的随机跨度大小的div(.childBox)。
<div ng-controller="HomeCtrl">
<div class="motherBox" ng-repeat="n in news">
<div class="childBox" class="col-md-{{boxSpan}} box">
<a href="#" class="thumbnail">
<img src="{{holderLink}}" height="200px" alt="100x100">
<p class="tBlock"> {{n.title}} </p>
</a>
</div>
</div>
</div>
controller('HomeCtrl', ['$scope', '$http', function($scope,$http) {
$http.get('news/abc.json').success(function(data) {
$scope.news = data;
});
$scope.holderSize = 150;
$scope.holderLink = 'http://placehold.it/'+$scope.holderSize+'x'+$scope.holderSize;
$scope.boxSpan = getRandomSpan();
function getRandomSpan(){
return Math.floor((Math.random()*6)+1);
};
}])
我想为每个.childBox div为boxSpan创建不同的整数值,但所有.childBox都具有相同的boxSpan值。虽然每次刷新页面时,boxSpan都会创建随机值。
如何为每次ng-repeat迭代生成不同/随机值?
答案 0 :(得分:25)
只需向您的示波器调用添加getRandomSpan()
功能,然后在模板中调用它:
$scope.getRandomSpan = function(){
return Math.floor((Math.random()*6)+1);
}
<div ng-controller="HomeCtrl">
<div class="motherBox" ng-repeat="n in news">
<div class="childBox" class="col-md-{{getRandomSpan()}} box">
<a href="#" class="thumbnail">
<img src="{{holderLink}}" height="200px" alt="100x100">
<p class="tBlock"> {{n.title}} </p>
</a>
</div>
</div>
</div>
答案 1 :(得分:22)
作为已接受答案的替代方案,由于您可能会重复使用此功能,因此您可以将其转换为过滤器以方便使用:
angular.module('myApp').filter('randomize', function() {
return function(input, scope) {
if (input!=null && input!=undefined && input > 1) {
return Math.floor((Math.random()*input)+1);
}
}
});
然后,您可以定义最大值并在应用的任何位置使用它:
<div ng-controller="HomeCtrl">
<div class="motherBox" ng-repeat="n in news">
<div class="childBox" class="col-md-{{6 | randomize}} box">
<a href="#" class="thumbnail">
<img src="{{holderLink}}" height="200px" alt="100x100">
<p class="tBlock"> {{n.title}} </p>
</a>
</div>
</div>
</div>
答案 2 :(得分:3)
即时回答以防止摘要溢出:
var rand = 1;
$scope.initRand = function(){
rand = Math.floor((Math.random()*6)+1)
}
$scope.getRandomSpan = function(){
return rand;
}
<div ng-controller="HomeCtrl">
<div class="motherBox" ng-repeat="n in news">
<div class="childBox" ng-init="initRand()" class="col-md-{{getRandomSpan()}} box">
<a href="#" class="thumbnail">
<img src="{{holderLink}}" height="200px" alt="100x100">
<p class="tBlock"> {{n.title}} </p>
</a>
</div>
</div>
</div>