复制和粘贴在Mobile Safari和CodeMirror上不起作用

Question

I have wrote the following code:

function copy() {
  if(window.clipboardData) {
    window.clipboardData.clearData();
    window.clipboardData.setData("Text", document.getElementById('txtacpy').value);
  } 
}

function paste() {
  if(window.clipboardData) {   
    document.getElementById('txtapaste').value = window.clipboardData.getData("Text");
  } 
}

When CodeMirror editor is focused I call:

paste();

But nothing happens! Browser is Mobile Safari. How to fix the issue?

Answer 1

This functionality is not supported in most browsers because of security issues without allowing a web page to have access to your clipboard. This is not only Mobile Safari. You won't find it supported in most browsers (like Chrome or Firefox).

Some people use a Flash work-around called zClip/ZeroClipboard that does allow copying to the clipboard, but only from a direct user click on the Flash object. This is obviously not an option in mobile safari.

If you are only trying to move data around within your page, then you don't have to use the system clipboard to do that - you can create your own holding area for the data (a javascript variable) and put the data there upon Copy and retrieve it from there upon Paste. Then, you use normal DOM functions (not copy/paste functions) to get the data from a field or to put the data into a field.