简单滑块验证

结合jQuery实现了一个简单的滑块验证，效果图如下：

验证前

通过验证

slide-verify.html:

    
    
    
    
    
    



    

        

        

            请按住滑块，拖动到最右边
        
        

    

slide-verify.css:

.drag{
    position: relative;
    background-color: #e8e8e8;
    width: 300px;
    height: 34px;
    line-height: 34px;
    text-align: center;
}
.drag .handler{
    position: absolute;
    top: 0px;
    left: 0px;
    width: 40px;
    height: 32px;
    border: 1px solid #ccc;
    cursor: move;
}
.handler_bg{
    background-color: #fff;
    background-image: url("../img/slider.png");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 20px;
}
.handler_ok_bg{
    background-color: #fff;
    background-image: url("../img/pass.png");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 20px;
}
#drag .drag_bg{
    background-color: #7ac23c;
    height: 34px;
    width: 0px;
}
#drag .drag_text{
    position: absolute;
    top: 0px;
    width: 300px;
    color:#9c9c9c;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
    -o-user-select:none;
    -ms-user-select:none;
    font-size: 12px;   
}
/*扫光效果*/
.slidetounlock{
    font-size: 12px;
    background:-webkit-gradient(linear,left top,right top,color-stop(0,#4d4d4d),color-stop(.4,#4d4d4d),color-stop(.5,#fff),color-stop(.6,#4d4d4d),color-stop(1,#4d4d4d));
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
    -webkit-animation:slidetounlock 3s infinite;
    -webkit-text-size-adjust:none
}
@-webkit-keyframes slidetounlock{
    0%{background-position:-200px 0} 
    100%{background-position:200px 0}
}

slide-verify.js:

$.fn.drag = function(options) {
    var x, drag = this, isMove = false, defaults = {
    };
    var options = $.extend(defaults, options);
    var handler = drag.find('.handler');
    var drag_bg = drag.find('.drag_bg');
    var text = drag.find('.drag_text');
    var maxWidth = drag.width() - handler.width();  //能滑动的最大间距
    var ISPC = isPC();
    var touchEvents = {
        touchstart: "touchstart",
        touchmove: "touchmove",
        touchend: "touchend",

        /**
         * @desc:判断是否pc设备，若是pc，需要更改touch事件为鼠标事件，否则默认触摸事件
         */
        initTouchEvents: function () {
            if (isPC()) {
                this.touchstart = "mousedown";
                this.touchmove = "mousemove";
                this.touchend = "mouseup";
            }
        }
    };
    touchEvents.initTouchEvents();
    function isPC() { 
       var userAgentInfo = navigator.userAgent; 
       var Agents = new Array("Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"); 
       var flag = true; 
       for (var v = 0; v < Agents.length; v++) { 
           if (userAgentInfo.indexOf(Agents[v]) > 0) { flag = false; break; } 
       } 
       return flag; 
    }  

    //鼠标按下时候的x轴的位置
    handler.bind(touchEvents.touchstart, function (e) {
        isMove = true;
        var touch = ISPC ? e : e.originalEvent.targetTouches[0];
        x = touch.pageX - parseInt(handler.css('left'), 10);
    })

    $(document).bind(touchEvents.touchmove, function (e) {
        var touch = ISPC ? e : e.originalEvent.targetTouches[0];
        var _x = touch.pageX - x;// _x = e.pageX - (e.pageX - parseInt(handler.css('left'), 10)) = x
        if (isMove) {
            if (_x > 0 && _x <= maxWidth) {
                handler.css({'left': _x});
                drag_bg.css({'width': _x});
            } else if (_x > maxWidth) {  //鼠标指针移动距离达到最大时清空事件
                dragOk();
            }
        }
     
    });
     
    $(document).bind(touchEvents.touchend, function (e) {
        isMove = false;
        var touch = ISPC ? e : e.originalEvent.changedTouches[0];
        var _x = touch.pageX - x;
        if (_x < maxWidth) { //鼠标松开时，如果没有达到最大距离位置，滑块就返回初始位置
            handler.css({'left': 0});
            drag_bg.css({'width': 0});
        }
         
    });
    //清空事件
    function dragOk() {
        handler.removeClass('handler_bg').addClass('handler_ok_bg');
        text.removeClass('slidetounlock').text('验证通过').css({'color':'#fff'}); //modify
       // drag.css({'color': '#fff !important'});

        handler.css({'left': maxWidth});
        drag_bg.css({'width': maxWidth});

        handler.unbind(touchEvents.touchstart);
        $(document).unbind(touchEvents.touchmove);
        $(document).unbind(touchEvents.touchend);
        options.verifyOk();
    }
};