弹出框优化实例(alert和confirm)

来源:互联网 发布:淘宝主图制作 编辑:程序博客网 时间:2024/05/20 22:29
在项目过程中会遇到需要使用自己定义的弹出框的情况。以前用过ymprompt,但是它太复杂而且不好自己操控。所以自己写了一个弹出框实例。

  主要有两类弹出框alert和confirm。基于jQuery

 

alert([title,]des[,callback]):

  title: 弹出框标题,string类型,可选

  des: 弹出框内容描述,string类型,必须

  callback: 弹出框点击按钮后的回调函数,可选

  效果图如下

  

  

confirm([title,]des,callback):

  title: 弹出框标题,string类型,可选

  des: 弹出框内容描述,string类型,必须

  callback: 弹出框点击按钮后的回调函数,必须

  效果图如下

  

  

  处理上都比较简单,需要注意的有以下几点:

  1.对传入参数的多样处理

  2.完成初始化以后需要按钮上焦点

  3.响应回调之前需要把弹出框隐藏起来。

  4.由于我们自定义的弹出框,confirm不能使用if(confirm('确认?') == true){expression}这种方式而是使用回调来处理。

  

  完整源码alert.js如下(可以根据需要自己做拓展)。

var confirmCallbacks = '';var alertCallbacks = '';/*至少一个参数des*/function alert(title,des,callback){    if(!title){        top.alert('请为alert函数输入正确的参数!');        return;    }else if(!des){        des = title;        title = '信息提示';    }else if(des && !callback){        if(typeof des == 'function'){            callback = des;            des = title;            title = '信息提示';        }    }    $('.xgalert .modal-header').addClass('warning')    $('#alert_title').html(title);    $('#alert_des').html(des);    $('.btn.btn-warning').html('确定').show();    $('.btn.btn-primary').hide();    alertCallbacks = callback;    $('.xgalert').addClass('active');    setTimeout(function(){$('.btn.btn-warning')[0].focus()},100);}//注意此处confirm不能使用if(confirm('确认?') == true){expression}这种方式,//只能把expression写到回调中//至少两个参数des,callbackfunction confirm(title,des,callback){    if(!title || !des){        top.alert('请为confirm函数输入正确的参数!');        return;            }else if(!callback){        callback = des;        des = title;        title = '信息提示';    }    $('.xgalert .modal-header').removeClass('warning')    $('.xgalert').addClass('active')    $('#alert_title').html(title);    $('#alert_des').html(des);    $('.btn.btn-warning').html('取消').show();    $('.btn.btn-primary').html('确定').show();    confirmCallbacks = callback;    $('.xgalert').addClass('active')    setTimeout(function(){$('.btn.btn-warning')[0].focus()},100);}$(function(){    $(document).on('click','.xgalert .btn.btn-warning',function(){        //必须要先关闭弹出框,然后在执行回调(防止回调中有对弹出框的处理导致显示错误)        $('.xgalert').removeClass('active');        if(alertCallbacks){            alertCallbacks();        }        alertCallbacks = '';                   }).on('click','.xgalert .close',function(){         $('.xgalert').removeClass('active');    }).on('click','.xgalert .btn.btn-primary',function(){        //必须要先关闭弹出框,然后在执行回调(防止回调中有对弹出框的处理导致显示错误)        $('.xgalert').removeClass('active');        if(confirmCallbacks){            confirmCallbacks();        }else{            alert('没有回调函数!')        }        confirmCallbacks = '';           });})window.alert = alert;window.confirm = confirm;

  html与css代码如下,后面有一个例子,不过需要注意一点是alert、confirm是函数,连续调用最终只会呈现最后一次调用的结果。

<!DOCTYPE html><html lang="ch-cn">  <head>  <meta charset="utf-8">  <script type="text/javascript" src='jquery-1.9.1.js'></script>    <script type="text/javascript" src='alert.js'></script>    <style type="text/css">    html,body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, button, textarea, p, blockquote, th, td{      margin: 0;      padding:0;    }    *{      -webkit-box-sizing: border-box;      -moz-box-sizing: border-box;      box-sizing: border-box;    }    body{      font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;    }    .xgalert{        height: 100%;        width: 100%;        position: fixed;        top: 0px;        display: none;        z-index: 10000 !important;    }    .xgalert.active{      display: block;    }    .xgalert .modal-preview{        position: fixed;        height: 100%;        width: 100%;        background: #000;        background: rgba(0,0,0,0.5);        filter: alpha(opacity=50);        /*z-index: 100000;使用这种方式实现ie8半透明用了position: fixed/absolute/relative;就不能使用z-index*/    }    .xgalert .modal-preview .modal{        top: 50%;        position: relative;        margin-top: -114px;        margin-left: auto;        margin-right: auto;        width: 450px;        display: block;        overflow: hidden;    }    .modal-preview .modal .modal-dialog {        width: 90%;        margin: 30px auto;        position: relative;    }    .modal-content {        -webkit-border-radius: 0;        -webkit-background-clip: padding-box;        -moz-border-radius: 0;        -moz-background-clip: padding;        border-radius: 0;        background-clip: padding-box;        -webkit-box-shadow: 0 0 40px rgba(0,0,0,.5);        -moz-box-shadow: 0 0 40px rgba(0,0,0,.5);        box-shadow: 0 0 40px rgba(0,0,0,.5);        color: #000;        background-color: #fff;        border: rgba(0,0,0,0);    }    .modal-header {        min-height: 16.43px;        padding: 10px 15px 10px 20px;        background-color: #f5f5f5;    }    .modal-primary .modal-header {        border-bottom: 3px solid #4374e0;    }    .warning {        border-bottom: 3px solid #c2002d!important;        color: #f4b400!important;    }    .close {        float: right;        font-size: 26px;        font-weight: 700;        line-height: 1;        color: #000;        text-shadow: 0 1px 0 #fff;        filter: alpha(opacity=20);        opacity: .2;        font-family: inherit;    }    button.close {        -webkit-appearance: none;        padding: 0;        cursor: pointer;        background: 0 0;        border: 0;    }    .modal-title {        margin: 0;        line-height: 1.42857143;        font-family: inherit;        font-weight: 500;    }    .modal-body {        position: relative;        padding: 15px;    }    p {        line-height: 22px;        margin: 0 0 10px;    }    .modal-footer {        padding-top: 12px;        padding-bottom: 14px;        border-top: 0;        background-color: #f5f5f5;        padding: 15px;        text-align: right;    }    .btn {        cursor: pointer;        vertical-align: middle;        margin: 0;        position: relative;        display: inline-block;        color: #fff;        -webkit-box-shadow: 0 1px 0 rgba(0,0,0,.05);        -moz-box-shadow: 0 1px 0 rgba(0,0,0,.05);        box-shadow: 0 1px 0 rgba(0,0,0,.05);        -webkit-transition: all .15s ease;        -moz-transition: all .15s ease;        -o-transition: all .15s ease;        transition: all .15s ease;        -webkit-border-radius: 2px;        -webkit-background-clip: padding-box;        -moz-border-radius: 2px;        -moz-background-clip: padding;        border-radius: 2px;        background-clip: padding-box;        font-size: 13px;        font-family: inherit;        font-weight: 400;        line-height: 1.42857143;        text-align: center;        white-space: nowrap;        -webkit-user-select: none;        -moz-user-select: none;        -ms-user-select: none;        user-select: none;        background-image: none;        border: 1px solid transparent;        -webkit-appearance: button;        color: #444;        padding: 6px 12px;    }    .btn-primary, .btn-primary:focus {        background-color: #427fed!important;        border-color: #427fed;        color: #fff;    }    .btn-warning, .btn-warning:focus {        background-color: #f4b400!important;        border-color: #f4b400;        color: #fff;    }    .modal-footer .btn+.btn {        margin-bottom: 0;        margin-left: 5px;    }    </style>  </head>  <body >    <div class='xgalert'>        <div class="modal-preview">            <div class="modal modal-primary">                <div class="modal-dialog">                    <div class="modal-content">                        <div class="modal-header">                            <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>                            <h4 id='alert_title' class="modal-title"></h4>                        </div>                        <div class="modal-body">                            <p id='alert_des'></p>                        </div>                        <div class="modal-footer">                          <button type="button" class="btn btn-primary">确定</button>                            <button type="button" class="btn btn-warning" data-dismiss="modal">取消</button>                        </div>                    </div>                </div>            </div>        </div>    </div>  </body>  <script type="text/javascript">  alert("alert");  //alert("自定义标题","alert");  //alert("自定义标题","alert",function(){alert("这个是alert回调结果")});  //alert("alert",function(){alert("这个是alert回调结果")});  //confirm("confirm没有回调会提示错误");  //confirm("confirm没有回调会提示错误",function(){alert("这个是comfirm回调结果")});  //confirm("自定义标题","confirm没有回调会提示错误",function(){alert("这个是comfirm回调结果")});  </script>  </html>
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