问为什么我的“for”循环函数不能工作？

EN

var steps = '';

// Setting up the steps according to the number of slides
for( var i = 0; i < $itemsCount; ++i ) {

    var step = '';

    // Find step number and step text
    var step_text = $items.eq(i).attr('data-title');

    var step_count = i + 1;

    // current step will have the class 'current'
    var step = i === current ? '<li class="step current"><span data-step="'+ step_count +'">'+ step_text +'</span></li>' : '<li class="step"><span data-step="'+ step_count +'">'+ step_text +'</span></li>';

    i++;
    steps += step;
}

var navSteps = $( '<ul class="steps"/>' ).append(steps).prependTo($slider);

var steps = '';

// Setting up the steps according to the number of slides
for( var i = 0; i < $itemsCount; ++i ) {

    var step = '';

    // Find step number and step text
    while (i < $itemsCount) {

        var step_text = $items.eq(i).attr('data-title');

        var step_count = i + 1;

        // current step will have the class 'current'
        var step = i === current ? '<li class="step current"><span data-step="'+ step_count +'">'+ step_text +'</span></li>' : '<li class="step"><span data-step="'+ step_count +'">'+ step_text +'</span></li>';

        i++;
        steps += step;
    }
}

var navSteps = $( '<ul class="steps"/>' ).append(steps).prependTo($slider);