如何覆盖JQuery的.show()和.hide()来触发事件之前和之后的事件？

Question

我尝试覆盖JQuery的.show和.hide方法,以便在使用以下代码调用它们之前和之后启动触发器事件.

$(document).ready(function () {
    $('#dataBox').bind('afterShow', function () {
        alert('afterShow');
    });
    $('#dataBox').bind('afterHide', function () {
        alert('afterHide');
    });
    $('#dataBox').bind('beforeShow', function () {
        alert('beforeShow');
    });
    $('#dataBox').bind('beforeHide', function () {
        alert('beforeHide');
    });
    $('#toggleButton').click(function(){
        if($('#dataBox').is(':visible')) {
            $('#dataBox').hide ();
        } else {
            $('#dataBox').show();
        }
    });
});

jQuery(function ($) {
    var _oldShow = $.fn.show;
    //Override jquery's 'show()' method to include two triggered events before and after
    $.fn.show = function (speed, oldCallback) {
        return $(this).each(function () {
            var obj = $(this),
                newCallback = function () {
                    if ($.isFunction(oldCallback)) {
                        oldCallback.apply(obj);
                }
                obj.trigger('afterShow');
            };
        obj.trigger('beforeShow');
            _oldShow.apply(obj, [speed, newCallback]);
        });
    }
});

jQuery(function ($) {
    var _oldHide = $.fn.hide;
    //Override jquery's 'hide()' method to include two triggered events before and after
    $.fn.hide = function (speed, oldCallback) {
        return $(this).each(function () {
            var obj = $(this),
                newCallback = function () {
                    if ($.isFunction(oldCallback)) {
                        oldCallback.apply(obj);
                }
                obj.trigger('afterHide');
            };
        obj.trigger('beforeHide');
            _oldHide.apply(obj, [speed, newCallback]);
        });
    }
});

我有以下标记:

<input type='text' id='dataBox'/>
<input type='button' value='toggle' id='toggleButton' />

当我点击切换按钮时,'beforeHide'和'beforeShow'事件正在触发,而'afterShow'和'afterHide'则没有.谁能让我知道我做错了什么？

Answer 1

请检查演示小提琴.希望它有效

$ .show/$ .hide - 覆盖函数:

(function($){
$.override ={'show': $.fn.show, 'hide': $.fn.hide};

$.each($.override,function(M,F){

        var m=M.replace( /^\w/, function(r){ return r.toUpperCase(); });

        $.fn[M] = function(speed, easing, callback) {

            var args=[speed||0,easing||'',callback||function(){}];

            if( $.isFunction(speed)){
                args[2]=speed;
                args[0]=0;
            }                   
            else if( $.isFunction(easing)){
                args[2]=easing;
                args[1]='';
            }                   

            if(!this.selector){
                F.apply(this, arguments);
                return this;
            }

            return this.each(function () {
                var obj = $(this),
                    oldCallback = args[args.length-1],
                    newCallback = function () {
                        if ($.isFunction(oldCallback)){
                            oldCallback.apply(obj);
                        }
                        obj.trigger('after'+m);
                };

                obj.trigger('before'+m);
                args[args.length-1]=newCallback;

                //alert(args);
                F.apply(obj,args);

            });
        }
});
})(jQuery);

用法

jQuery(function($){
var $dataBox=$('#dataBox').bind('beforeHide afterHide beforeShow afterShow', function(e) {
    alert(e.type);
});

$('#toggleButton').bind('click',function(){
    $dataBox[$dataBox.is(':visible')?'hide':'show'](100,'swing',function(){ alert('end of animation');});
    return false;
});
});