我正在尝试创建一个搜索模式,当用户按下 s 时,它将运行一个搜索框。它有效,但是有两个问题:
$("body").bind('keyup', function(event) {
if (event.which == 83) {
$('#search-modal').show();
}
});
答案 0 :(得分:2)
我从评论中看到,您可能已更改了应用程序中的方法,但出于学术上的价值-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()
来添加/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>
<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>
<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>
<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,显示了当用户位于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>
这里是一个示例,显示了如何分配 Ctrl s 来打开搜索模式,而不仅仅是字母 s 。
因为没有成对的“ Ctrl + S”键码,所以我们必须分别跟踪每个键。因此,我们使用全局变量来跟踪是否已按下CTRL键,然后仅在将Ctrl键标记为按下时才监视“ 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();
$('body').off('keyup'); //the "s" will only work once
}
});
});
#olay{
position: fixed;
top: 0;
left: 0;
width: 100vw;
height: 100vh;
background:black;
opacity: 0.6;
z-index:9998;
display:none;
}
#mdl {
position: fixed;
top: 10%;
left: 25%;
background: wheat;
z-index:9999;
display:none;
}
#mdl_inner {padding:50px;}
#mdl_closeX{padding:5px;text-align:right;cursor:pointer;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<div id="olay"></div>
<div id="mdl">
<div id="mdl_closeX"> X </div>
<div id="mdl_inner">My Modal</div>
</div>
<h3>Click on the page body, then press [ Ctrl ] [ s ] </h3>
<p>[Ctrl] [s] will open the modal no matter where the user is, and will not interfere with the letter [s] by itself. </p>
<p><b>Note that it was necessary to use `return false` to suppress the default action of [Ctrl][s] within the browser</b></p>
<div>
When click in the input field, the "s" works like the letter "s", and [Ctrl] [s] will open the modal (even in the input field)
<input type="text" />
</div>
我还对第3个演示进行了一些微调,以向您展示如何将其转变为真正的模态-因此不需要jQueryUI或任何其他预制模态。您可以在后台看到它们的工作方式。基本上,您需要一个叠加层(只是一个覆盖整个屏幕的div),其z-index高于模式对话框页面 上的其他任何元素。然后,您需要模态对话框结构(只是一个普通的div,里面有东西),该结构位于(使用z-index)位于叠加层的顶部。是的,就是这么简单。
答案 1 :(得分:0)
您是否尝试过这种情况?
if($('#search-modal').is(':visible')){
//do other things
}