2 回答
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TA贡献1851条经验 获得超3个赞
我从评论中看到您可能已经改变了您在申请中的方法,但为了它的学术价值 - 回答书面问题:
您可以使用.on()
代替.bind()
(自 jQuery 1.7 起已弃用)和.off()
添加/删除事件处理程序。
这将允许您根据需要打开/关闭该事件处理程序。
$("body").on('keyup', function(event) {
if (event.which == 83) {
$('#mdl').show();
$('body').off('keyup'); //the "s" will only work once
}
});
$('#mdl_closeX').click(function(){
$('#mdl').hide();
});
#mdl {
position: fixed;
top: 10%;
left: 25%;
background: wheat;
display:none;
}
#mdl_inner {padding:50px;}
#mdl_closeX{padding:5px;text-align:right;cursor:pointer;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<div id="mdl">
<div id="mdl_closeX"> X </div>
<div id="mdl_inner">My Modal</div>
</div>
<h3>Click on the page body, then press the letter [ s ] </h3>
<p>The [s] binding will work only once. After closing the modal, pressing [s] will not open it again. </p>
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<p>Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet. </p>
这是一个修改后的示例,显示了当用户在输入字段中时如何关闭事件处理程序:
$("body").on('keyup', function(event) {
if (event.which == 83) {
$('#mdl').show();
}
});
$('#mdl_closeX').click(function(){
$('#mdl').hide();
});
$('input').focus(function(){
$('body').off('keyup'); //the "s" will only work once
});
$('input').blur(function(){
$("body").on('keyup', function(event) {
if (event.which == 83) {
$('#mdl').show();
$('body').off('keyup'); //the "s" will only work once
}
});
});
#mdl {
position: fixed;
top: 10%;
left: 25%;
background: wheat;
display:none;
}
#mdl_inner {padding:50px;}
#mdl_closeX{padding:5px;text-align:right;cursor:pointer;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<div id="mdl">
<div id="mdl_closeX"> X </div>
<div id="mdl_inner">My Modal</div>
</div>
<h3>Click on the page body, then press the letter [ s ] </h3>
<p>The [s] binding will work any time the user is NOT inside an input field. </p>
<div>
When click in the input field, the "s" will be normalized. Next, click anywhere else on the body and the "s" will once again open the modal.
<input type="text" />
</div>
这是一个示例,显示如何分配Ctrl s以打开搜索模式,而不仅仅是字母s。
因为“Ctrl+S”没有成对的键码,我们必须分别跟踪每个键。所以我们使用一个全局变量来跟踪 CTRL 键是否被按下,然后仅当 Ctrl 键被标记为按下时才观察“s”。
var ctrldn = false;
$("body").on('keydown', function(event) {
if (event.which == 17){
ctrldn = true;
}
});
$("body").on('keyup', function(event) {
if (event.which == 17){
ctrldn = false;
}
});
$("body").on('keydown', function(event) {
if (ctrldn && event.which == 83){
$('#mdl, #olay').show();
return false;
}
});
$('#mdl_closeX').click(function(){
$('#mdl, #olay').hide();
});
$('input').focus(function(){
ctrldn = false;
$('body').off('keyup'); //the "s" will only work once
});
$('input').blur(function(){
$("body").on('keyup', function(event) {
if (ctrldn && event.which == 83) {
$('#mdl').show();
$('body').off('keyup'); //the "s" will only work once
}
});
});
#olay{
position: fixed;
top: 0;
left: 0;
width: 100vw;
height: 100vh;
background:black;
opacity: 0.6;
z-index:9998;
display:none;
}
#mdl {
position: fixed;
top: 10%;
left: 25%;
background: wheat;
z-index:9999;
display:none;
}
#mdl_inner {padding:50px;}
#mdl_closeX{padding:5px;text-align:right;cursor:pointer;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<div id="olay"></div>
<div id="mdl">
<div id="mdl_closeX"> X </div>
<div id="mdl_inner">My Modal</div>
</div>
<h3>Click on the page body, then press [ Ctrl ] [ s ] </h3>
<p>[Ctrl] [s] will open the modal no matter where the user is, and will not interfere with the letter [s] by itself. </p>
<p><b>Note that it was necessary to use `return false` to suppress the default action of [Ctrl][s] within the browser</b></p>
<div>
When click in the input field, the "s" works like the letter "s", and [Ctrl] [s] will open the modal (even in the input field)
<input type="text" />
</div>
更新:
我还稍微调整了第三个演示,向您展示如何将其转换为真正的模态——因此不需要 jQueryUI 或任何其他预制模态。你可以看看它们是如何在引擎盖下工作的。基本上,您需要一个覆盖(只是一个覆盖整个屏幕的 div),其 z-index 高于页面上除模态对话框之外的任何其他内容。然后你需要模态对话框结构(只是一个普通的 div,里面有东西),它被定位(使用 z-index)以坐在叠加层的顶部。是的,就是这么简单。
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