jQuery-Steps OnFinishing事件缺少CurrentIndex参数

Question

我正在使用jQuery steps，一切似乎都在工作，除了我想为所有步骤设置一个Finish / Save按钮并执行不同的操作。虽然根据它的documentation，OnFinishing事件将currentIndex作为其参数，但它看起来并不像是设置它，当我调试代码时，它总是未定义的。我在设置中缺少什么？

 $("#wizard").steps({
        /* Appearance */
        bodyTag: "section",
        stepsOrientation: 1,//vertical            
        showFinishButtonAlways: true,

        /* Behaviour */
        enableAllSteps: true,
        saveState: true,

        /* Events */
        onStepChanging: function (event, currentIndex, newIndex) {                                              
           return true;
        },
        onStepChanged: function (event, currentIndex, priorIndex) { },
        onFinishing: function (event, currentIndex) {                
            console.log(currentIndex);                
        },
        onFinished: function (event, currentIndex) {
            console.log(currentIndex); 
        },

        /* Labels */
        labels: {
            current: "current step:",
            pagination: "Pagination",
            finish: "Save",
            next: "Next",
            previous: "Previous",
            loading: "Loading ..."
        }
    });