好吧,从技术上讲,你不能这样做。但是,如果您劫持 iframe 中的事件,您可以在主窗口中重新创建上下文菜单,并使用 div 在 iframe 中的相对位置 + iframe 本身的绝对位置。
因此,总而言之,上下文菜单可以在 iframe 之外,并由 iframe 内的事件进行操作。
让我告诉你如何做到这一点。我没有你的代码,所以我只是在做一个非常粗略的概念证明。:)
示例| 代码
HTML
<iframe id='my_frame'></iframe>
<div id='copy_to_frame'>
<ul id='files_list'>
<li>data.dat</li>
<li>manual.html</li>
<li>readme.txt</li>
<li>model1.obj</li>
<li>human_model.obj</li>
</ul>
</div>
<div class='context_menu'>
<ul>
<li>Delete</li><li>Open</li><li>Move</li><li>Copy</li>
</ul>
</div>
Javascript
//Declare the necessary variables, good practice
var frame = $("#my_frame"),
frame_contents = frame.contents(),
frame_body = frame_contents .find("body"),
copy_list = $("#copy_to_frame"),
context_menu = $(".context_menu");
var bInside = false;
//Fill the iframe with a list
frame_body.html(copy_list.html());
copy_list.hide();
paint();
//Attach event handler for context menu popup etc.
$("#files_list li", frame_body).click(function(e){
var $this = $(this);
var rel_x = $this.position().left + $this.outerWidth() + 5,
rel_y = $this.position().top + $this.outerHeight()/2 - context_menu.outerHeight()/2 - frame_body.scrollTop(),
abs_x = frame.offset().left,
abs_y = frame.offset().top;
e.stopPropagation();
context_menu.css({
top: rel_y + abs_y,
left: rel_x + abs_x
});
//Show the context menu in this window
context_menu.show();
paint($this);
});
//Hide when clicking outside the context menu
$(document).add(frame_body).click(function(){
if(!bInside){
context_menu.hide();
paint();
}
});
//Determine if mouse is inside context menu
context_menu.mouseenter(function(){
bInside = true;
}).mouseleave(function(){
bInside = false;
});
function paint(el){
$("#files_list li", frame_body).css({
"background-color": "white",
"border": "1px solid transparent"
});
if(el){
el.css({
"background-color": "#ddecfd",
"border": "1px solid #7da2ce"
});
}
}
CSS
#my_frame{
position: absolute;
border: 1px solid gray;
width: 200px;
height: 100px;
top: 50%; left: 50%;
margin-top: -62.5px;
margin-left: -100px;
z-index: 1;
}
.context_menu{
display: none;
position: absolute;
top: 0;
left: 0;
background-color: white;
z-index: 2;
}
.context_menu ul{
border: 1px solid black;
border-right: 0;
display: inline-block;
}
.context_menu li{
display: inline-block;
border-right: 1px solid black;
padding: 2px;
text-align: center;
margin: 0px;
cursor: default;
}
.context_menu li:hover{
background-color: lightgray;
}