JQuery - 添加onclick以动态生成img标记

Question

我使用以下代码动态创建多个图像:

function refresh_gallery(galleryidentifier, albumid) {
    $.ajax({ type: "POST", url: "/Photos/Thumbnails/" + albumid + "/", data: {}, success: function(msg) {
        try {
            var fotos = eval(msg); $(galleryidentifier).empty(); if (fotos.length == 0) { $(galleryidentifier).html("Press "Add files..." and select files to upload!"); return true; }
            for (var f in fotos) {
                //this image needs the onclick eventhandler
                $(document.createElement("img")).attr({ src: '/images/delete.gif', title: 'Delete ' + fotos[f].Title }).addClass("icon_delete").appendTo(galleryidentifier); ;
                $(document.createElement("img")).attr({ src: fotos[f].ThumbnailPath, title: fotos[f].Title }).addClass("thumbnail").appendTo(galleryidentifier);
            }
            var del_div = $(document.createElement("div")).css({ "padding": "4px" }).appendTo(galleryidentifier);
            var delete_span = $(document.createElement("span")).click(delete_files(albumid)).css({ "cursor": "pointer", "font-size": "12px" }).appendTo(del_div);
            $(document.createElement("img")).attr({ "src": "/Content/images/delete.png" }).appendTo(delete_span);
            $(document.createTextNode("delete all")).appendTo(delete_span);
            return true;
        }
        catch (e) {
            alert(e);
        }
        alert("Refresh error!");
    }, error: function() { alert("Refresh error!"); }
    });
}

图像的生成工作正常,但我想在生成的第一个图像上添加一个onclick事件处理程序(请参阅代码中的注释).我该怎么做呢？我是JQuery的新手.

谢谢!

Answer 1

$(document.createElement("img"))
    .attr({ src: '/images/delete.gif', title: 'Delete ' + fotos[f].Title })
    .addClass("icon_delete")
    .appendTo(galleryidentifier)
    .click(function(){
        // Do something
    })

Answer 2

jQuery有一个名为click的方法,其参数是一个回调函数.在这个例子中,我还将使用(更简单)的简写来创建图像元素:

$('<img/>').click(function () {
    // do something
}).attr({
    src: '/images/delete.gif',
    title: 'Delete ' + fotos[f].Title
}).addClass("icon_delete").appendTo(galleryidentifier);

Answer 3

从jQuery 1.4开始,您可以创建一个元素,并在创建时添加所有atrributes /事件.

对于图像标记,您可以编写:

$('<img/>', {
    src:     '/images/delete.gif',
    title:   'Delete ' + fotos[f].Title,
    'class': 'icon_delete', // in quotes because class is a reserved js word
    click:   function( e ){
        // Everything here happens when you click the image.
    }
}).appendTo(galleryidentifier);

以上JSBin中的示例.

这是对文档的引用.

为什么它比使用jQuery创建图像的其他方式更好:

• 比链接十几种方法更清洁.
• 允许您发送具有不同属性的对象以进行创建.
• 与常规的html"硬编码"元素很好地匹配.