anglejs – Angular JS：ng-click范围集在ng-if中不起作用

当您尝试直接在ng点击中设置范围值时,当您的点击是ng – 如果哪个测试具有相同的范围值 – >时,它不起作用. http://jsfiddle.net/9j2TL/26/

angular.module('test',[])
.controller('testCtrl',function($scope) {
    $scope.step = 1;

    $scope.setStep = function(step) {
         $scope.step = step;  
    };
});

<div ng-app="test">
<div ng-controller="testCtrl">
    <ul class="timeline">
        <li>
            <div class="block-submit">
                <button class="btn btn-primary btn-lg" ng-click="step = 2">Without ngif block</button>
            </div>
        </li>

        <li ng-if="step > 1">
            <div class="block-submit">
                <button class="btn btn-primary btn-lg" ng-click="step = 3">with ngif block</button>
            </div>
        </li>

        <li ng-if="step > 1">
            <div class="block-submit">
                <button class="btn btn-primary btn-lg" ng-click="setStep(3)">With ngif block and scope function</button>
            </div>
        </li>
    </ul>
    <p>
        step value : {{ step }}
    </p>
</div>
</div>

要解决它,你应该创建一个范围函数…

如果有人解释这个问题,我很乐意理解它！

谢谢 ：)