如果您在容器区域中有许多 droppable，那么呢？？？？
你必须重新考虑这个问题。贪婪只适用于父子关系，而不适用于兄弟姐妹。所以你必须编辑 droppable js 或者为它添加你自己的逻辑。
因此，如果您有许多 droppable，那么您必须编写一些额外的代码来处理完美 droppable 上的删除，就像在这个示例中一样。
为了使完美的兄弟姐妹可放置，请修改您的droppbale，如下所示
var topElement = undefined;
var topElementArray = Array();
$( "#draggable" ).draggable();
$( ".droppableBox" ).droppable({
activeClass: "active-droppable",
tolerance:'pointer',
over: function( event, ui ) {
// This is for only show a message that z-index must be required for proppable
// you can remove it after testing or after development
if ($(this).css("z-index") == 'auto') {
alert("Please provide z-index for every droppable.");
return;
}
//
topElement = undefined;
topElementArray = Array();
// Change it as you want to write in your code
// For Container id or for your specific class for droppable or for both
$('#demo > .droppableBox').each(function(){
_left = $(this).offset().left, _right = $(this).offset().left + $(this).width();
_top = $(this).offset().top, _bottom = $(this).offset().top + $(this).height();
if (event.pageX >= _left && event.pageX <= _right && event.pageY >= _top && event.pageY <= _bottom) {
topElementArray.push($(this).attr('id'));
}
});
},
drop: function( event, ui ) {
if (!topElement) {
topElement = determineTopElement(topElementArray);
}
if ($(this).attr('id') == $(topElement).attr('id')) {
$( this ).addClass( "ui-state-highlight" ).find( "p" ).html( "Dropped!" );
// Your code after successful dropped element on specific siblings
// Start writing code for dropped element & perfect droppable
}
}
});
determineTopElement = function(_array) {
var topElement;
var zIndexHighest = 0;
for (i = 0; i < _array.length; i++){
var element = $("#"+ _array[i]);
var z_index = $(element).css("z-index");
if( z_index > zIndexHighest){
zIndexHighest = z_index;
topElement = element;
}
}
return topElement;
}