拖放后再次放下元素

Question

我正在尝试使用 jQuery UI拖放功能构建UI，但卡在实例中。基本上，我正在做的是使内容框可以拖动并放在区域中。

我正在制作一个可拖动的盒子并放入该区域。这个问题是当一个元素掉落在任何区域时，它应该拖动并且可以在任何相应的区域再次被删除。

我一直在寻找它的解决方案，但没有找到任何帮助。

由于

以下是我正在处理的代码。

import React from 'react';
import Facebook from './svg/Facebook';
import LinkedIn from './svg/LinkedIn';
import Twitter from './svg/Twitter';
import Pinterest from './svg/Pinterest';

class SocialMediaBox extends React.Component {

    renderElement(item) {
        const Components = {
            'Facebook': Facebook,
            'Twitter': Twitter,
            'Pinterest': Pinterest,
            'LinkedIn': LinkedIn 
        }
        return React.createElement(Components[item], item);
    }

    render() {

        const Element = this.renderElement(this.props.id)

        return 
        (
            <div>
                {Element}
            </div>
        )
    }
}

export default SocialMediaBox;

/**/
	
	var blockBoxEle = $('.block-box');
	var blockBoxWd = blockBoxEle.width();
	blockBoxEle.css({'width': blockBoxWd});
	var blockBoxLen = blockBoxEle.length;
	for(var x=0; x<blockBoxLen; x++) {
			blockBoxEle.eq(x).addClass('block-count'+(x+1));
	}
	
	blockBoxEle.draggable({
	  revert: "invalid",
	  stack: blockBoxEle,
	  helper: 'clone',
	  stop: function(e, ui) {
		  
	  }
	});
	console.log('blockBoxElements Loaded!!!!!!!');
	
	
	/**/
	var areaBoxEle = $('.area-box');
	var areaBoxLen = areaBoxEle.length;
    for(var y=0; y<areaBoxLen; y++) {
        areaBoxEle.eq(y).prop('id', 'areaBox'+(y+1));
    }
	areaBoxEle.droppable({
	  accept: blockBoxEle,
	  tolerance: "pointer",
	  //greedy: true,
	  drop: function(event, ui) {
		var droppable = $(this);
		var draggable = ui.draggable;
		 if (droppable.find('.ui-draggable').length) return; 
		var dragClass = draggable.attr("class").split(' ')[1];
		
		var drag = areaBoxEle.has(ui.draggable).length ? draggable : draggable.clone().draggable({
		  revert: "invalid",
		  stack: blockBoxEle,
		  helper: 'clone'
		});
		
		droppable.empty();
		droppable.after(drag).hide();
		console.log('Dropped block class:'+dragClass+' on area id:'+this.id);
	  }
	});
	console.log('areaBoxElements Loaded!!!!!!!');

.block-box,
.area-box { margin: 0 0 10px; text-align: center; position: relative; }
.block-box { padding: 10px 5px; border: 2px solid #000; background: red; color: #fff; max-width: 100%; min-width: 100%; z-index: 2; }
.area-box { padding: 30px 5px; border: 2px dashed #333; background: #eee; z-index: 1; }
.block-box h3,
.area-box h3 { margin: 0; font-size: 14px; font-weight: 700; }
#block-fields .block-box { padding-top: 30px; padding-bottom: 30px; }

Answer 1

小修改解决了这个问题。设置@objc protocol MyProtocol { //older method 1 //older method 2 //... //older method X @objc optional func newMethod() } 允许drop接受任何可拖动的。

accept: ".block-box"

$(function() {
  function makeFirstDrag($el, $s) {
    $el.draggable({
      revert: "invalid",
      stack: $s,
      helper: 'clone'
    });
  }

  function makeSecondDrag($el, $s) {
    $el.draggable({
      revert: "invalid",
      stack: $s,
      helper: 'clone',
      start: function(e, ui) {
        $(this).css("opacity", ".25");
      },
      stop: function(e, ui) {
        $(this).prev().show();
        $(this).remove();
      }
    });
  }
  var blockBoxEle = $('.block-box');
  var blockBoxWd = blockBoxEle.width();
  blockBoxEle.css({
    'width': blockBoxWd
  });
  var blockBoxLen = blockBoxEle.length;
  for (var x = 0; x < blockBoxLen; x++) {
    blockBoxEle.eq(x).addClass('block-count' + (x + 1));
  }

  makeFirstDrag(blockBoxEle, blockBoxEle);
  console.log('blockBoxElements Loaded!!!!!!!');

  var areaBoxEle = $('.area-box');
  var areaBoxLen = areaBoxEle.length;
  for (var y = 0; y < areaBoxLen; y++) {
    areaBoxEle.eq(y).prop('id', 'areaBox' + (y + 1));
  }
  areaBoxEle.droppable({
    accept: ".block-box",
    tolerance: "pointer",
    drop: function(event, ui) {
      var droppable = $(this);
      var draggable = ui.draggable;
      if (droppable.find('.ui-draggable').length) return;
      var dragClass = draggable.attr("class").split(' ')[1];


      var drag = areaBoxEle.has(ui.draggable).length ? draggable : draggable.clone().draggable({
        revert: "invalid",
        stack: blockBoxEle,
        helper: 'clone'
      });
      drag.css("opacity", "1");
      makeSecondDrag(drag, blockBoxEle);

      //droppable.empty();
      droppable.addClass("hiding").hide().after(drag);
      console.log('Dropped block class:' + dragClass + ' on area id:' + this.id);
    }
  });
  console.log('areaBoxElements Loaded!!!!!!!');
});

.block-box,
.area-box {
  margin: 0 0 10px;
  text-align: center;
  position: relative;
}

.block-box {
  padding: 10px 5px;
  border: 2px solid #000;
  background: red;
  color: #fff;
  max-width: 100%;
  min-width: 100%;
  z-index: 2;
}

.area-box {
  padding: 30px 5px;
  border: 2px dashed #333;
  background: #eee;
  z-index: 1;
}

.block-box h3,
.area-box h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
}

#block-fields .block-box {
  padding-top: 30px;
  padding-bottom: 30px;
}

<强>更新

为draggable添加了许多<link href="https://code.jquery.com/ui/1.12.1/jquery-ui.min.css" rel="stylesheet" /> <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script> <div class="panel panel-default"> <div class="panel-body"> <div class="row"> <div id="block-panel" class="col-xs-3"> <div class="row"> <div class="col-xs-6"> <div class="block-box"> <h3>Field 1</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 2</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 3</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 4</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 5</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 6</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 7</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 8</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 9</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 10</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 11</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 12</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 13</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 14</h3> </div> </div> <div class="col-xs-6"> <div class="block-box"> <h3>Field 15</h3> </div> </div> </div> </div> <div id="block-fields" class="col-xs-9"> <div class="row"> <div class="col-xs-3"> <div class="area-box"> <h3>Area 1</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 2</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 3</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 4</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 5</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 6</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 7</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 8</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 9</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 10</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 11</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 12</h3> </div> </div> <div class="col-xs-3"> <div class="area-box"> <h3>Area 13</h3> </div> </div> </div> </div> </div> </div> </div>和start个回调，以帮助模拟您想要的活动。我还将它们移到了自己的函数中，以便更容易操作。