JavaScript 拖放在 iPad 上不起作用
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JavaScript Drag and Drop not working on iPad
提问by tim.baker
I have this drag and drop code, which works well except on iPads, can anyone give any reason why?
我有这个拖放代码，除了在 iPad 上运行良好，谁能给出任何理由？
It seams as though it can't recognise the fact it can be dragged as opposed to anything else
它看起来好像无法识别它可以被拖动而不是其他任何东西的事实
<span class="draggable" id="drag1" draggable="true" ondragstart="drag(event)">drag</span>
<span class="draggable" id="drag2" draggable="true" ondragstart="drag(event)">drop</span>
<br />
This is a sample
<div id="div1" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
and
<div id="div2" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
sentence.
JavaScript:
JavaScript：
function allowDrop(ev){
ev.preventDefault();
}
function drag(ev){
ev.dataTransfer.setData("Text",ev.target.id);
}
function drop(ev){
ev.preventDefault();
var data=ev.dataTransfer.getData("Text");
ev.target.parentNode.replaceChild(document.getElementById(data), ev.target);
document.getElementById(data).className = "";
}
回答by Nate Kibler
Your problem is that the "drag n' drop" feature native in HTML5 (with a bit of JavaScript) is not supported by most mobile browsers. Click herefor a list of what is supported.
您的问题是大多数移动浏览器不支持 HTML5 原生的“拖放”功能（带有一些 JavaScript）。单击此处获取支持的列表。
I suggest using an alternative approach that supports all mobile browsers. See this comment with more explanation: https://stackoverflow.com/a/9547931/2482557
我建议使用支持所有移动浏览器的替代方法。请参阅此评论更多解释：https: //stackoverflow.com/a/9547931/2482557
This might be something you want to look into: jQuery UI Touch Punch
这可能是您想要研究的内容：jQuery UI Touch Punch
回答by Roben
iOS 11 will finally support draggable="true"properly (http://caniuse.com/#feat=dragndrop). Until then and for all other devices you can use a polyfill such as
https://www.npmjs.com/package/drag-drop-polyfillor
https://github.com/Bernardo-Castilho/dragdroptouchto plug in the functionality without having to adapt your code.
iOS 11 最终将得到draggable="true"正确支持（http://caniuse.com/#feat=dragndrop）。在此之前，对于所有其他设备，您可以使用 polyfill，例如
https://www.npmjs.com/package/drag-drop-polyfill或
https://github.com/Bernardo-Castilho/dragdroptouch来插入功能无需调整您的代码。
