AngularJS:将变量用于<div> </div>

时间:2014-12-17 08:34:28

标签: javascript jquery angularjs data-binding angularjs-scope

我有一个名为“HomeCtrl”的控制器,用于计算{{total}}绑定变量中用户的总数,如下所示:

.controller('HomeCtrl', function($scope, $http){
    $scope.total = 0;
});

在我看来,我试图通过将{{total}}作为<div>标记上的属性值传递来在动画窗口小部件中显示我的总数,如下所示:

<div ng-controller="HomeCtrl" ng-init="init('users')">
    <div class="xe-widget xe-counter xe-counter-green" xe-counter 
       data-count=".num" data-from="1" 
       data-to= "{{total}}" 
       data-suffix="users" data-duration="3" data-easing="true">
          <div class="xe-icon">
                  <i class="linecons-user"></i>
          </div>
          <div class="xe-label">
                  <strong class="num">1k</strong>
                  <span>Users Total </span>
          </div>
   </div>            
   <center> <b> Total utilisateurs : {{total}} </b> </center>     

这是widget指令:

.directive('xeCounter', function(){     
        return {
            restrict: 'EAC',
            link: function(scope, el, attrs)
            {
                var $el = angular.element(el),
                    sm = scrollMonitor.create(el);
                sm.fullyEnterViewport(function()
                {
                    var opts = {
                        useEasing:      attrDefault($el, 'easing', true),
                        useGrouping:    attrDefault($el, 'grouping', true),
                        separator:      attrDefault($el, 'separator', ','),
                        decimal:        attrDefault($el, 'decimal', '.'),
                        prefix:         attrDefault($el, 'prefix', ''),
                        suffix:         attrDefault($el, 'suffix', ''),
                    },
                    $count      = attrDefault($el, 'count', 'this') == 'this' ? $el : $el.find($el.data('count')),
                    from        = attrDefault($el, 'from', 0),
                    to          = attrDefault($el, 'to', ''),
                    duration    = attrDefault($el, 'duration', 2.5),
                    delay       = attrDefault($el, 'delay', 0),
                    decimals    = new String(to).match(/\.([0-9]+)/) ? new String(to).match(/\.([0-9]+)$/)[1].length : 0,
                    counter     = new countUp($count.get(0), from, to, decimals, duration, opts);                   
                    setTimeout(function(){ counter.start(); }, delay * 1000);

                    sm.destroy();
                });
            }
        };
    })

我可以在我的视图中显示{{total}}的正确值,但是当我将{{total}}传递给属性data-to= "{{total}}"时,它不起作用。它不会将其识别为数字。

3 个答案:

答案 0 :(得分:4)

这对我有用: 控制器加载时,使用异步Web服务调用检索Number。 这意味着当调用sm.fullyEnteredViewport函数时,该值不存在。 但幸运的是,您可以在xe-counter元素上设置数据延迟属性。

&#13;
&#13;
<div class="xe-widget xe-counter" xe-counter data-delay="1" data-count=".num" data-from="0" data-to="{{ total }}" data-suffix="" data-duration="5">
<div class="xe-icon"><i class="linecons-cup" /></div>
<div class="xe-label"><strong class="num">0</strong><span>TOTAL</span></div>
</div>
&#13;
&#13;
&#13;

然后像这样修改你的指令: 从element中检索延迟值,并将其余的其他代码放入延迟函数中,如下所示:

&#13;
&#13;
directive('xeCounter', function () {
    return {
        restrict: 'EAC',
        link: function (scope, el, attrs) {

            var $el = angular.element(el),
                sm = scrollMonitor.create(el);
          
                //get the delay attribute from element
                var delay = attrs.delay ? attrs.delay : 0;

            sm.fullyEnterViewport(function () {

                setTimeout(function () {
                    // get all values from element delayed and start the counter
                    var opts = {
                        useEasing: attrDefault($el, 'easing', true),
                        useGrouping: attrDefault($el, 'grouping', true),
                        separator: attrDefault($el, 'separator', ','),
                        decimal: attrDefault($el, 'decimal', '.'),
                        prefix: attrDefault($el, 'prefix', ''),
                        suffix: attrDefault($el, 'suffix', '')
                    },
                    $count = attrDefault($el, 'count', 'this') == 'this' ? $el : $el.find($el.data('count')),
                    from = attrs.from ? attrs.from : 0,
                    to = attrs.to ? attrs.to : 100,
                    duration = attrs.duration ? attrs.duration : 2.5,
                    decimals = String(to).match(/\.([0-9]+)/) ? String(to).match(/\.([0-9]+)$/)[1].length : 0,
                    counter = new countUp($count.get(0), from, to, decimals, duration, opts);
                    counter.start();
                }, delay * 1000);

                sm.destroy();
            });
        }
    };
}).
&#13;
&#13;
&#13; 您的网络服务应在延迟时间内返回。 这对我有用。

答案 1 :(得分:1)

你必须要区分,因为如果你只是在你的指令模板中使用{{total}}它是有效的,因为如果在本地控制器中找不到,则angular会自动在父控制器中查找total。

另一方面,如果要在隔离范围中使用total的值,可以绑定到data-to属性,这可以通过以下代码实现:

app.directive('xeCounter', function(){
 return {
    restrict: 'EA',
    scope: { to: '@' },
    link: function(scope)
    {
        console.log(scope.to);
    }
 };
});

顺便说一下。我将限制从EAC更改为EA,否则您的指令将被应用两次并中断。而且你必须将星号放在属性值周围。

请参阅完整的工作示例here

答案 2 :(得分:1)

这适合我。

替换你的指令:

directive('xeCounter', function () {
    return {
        restrict: 'EAC',
        link: function (scope, el, attrs) {

            var $el = angular.element(el),
                sm = scrollMonitor.create(el);

            sm.fullyEnterViewport(function () {
                var opts = {
                        useEasing: attrDefault($el, 'easing', true),
                        useGrouping: attrDefault($el, 'grouping', true),
                        separator: attrDefault($el, 'separator', ','),
                        decimal: attrDefault($el, 'decimal', '.'),
                        prefix: attrDefault($el, 'prefix', ''),
                        suffix: attrDefault($el, 'suffix', '')
                    },
                    $count = attrDefault($el, 'count', 'this') == 'this' ? $el : $el.find($el.data('count')),
                    from = attrs.from ? attrs.from : 0,
                    to = attrs.to ? attrs.to : 100,
                    duration = attrs.duration ? attrs.duration : 2.5,
                    delay = attrs.delay ? attrs.delay : 0,
                    decimals = String(to).match(/\.([0-9]+)/) ? String(to).match(/\.([0-9]+)$/)[1].length : 0,
                    counter = new countUp($count.get(0), from, to, decimals, duration, opts);

                setTimeout(function () {
                    counter.start();
                }, delay * 1000);

                sm.destroy();
            });
        }
    };
}).

HTML应该保持这样:

<div class="xe-widget xe-counter" xe-counter data-count=".num" data-from="0" data-to="{{ total }}" data-suffix="" data-duration="5">
<div class="xe-icon"><i class="linecons-cup" /></div>
<div class="xe-label"><strong class="num">0</strong><span>TOTAL</span></div>
</div>

确定 $ scope.total 变量已声明且其值为数字。