setContent of an textarea with tinyMCE

Question

I have some textareas and all of them are with tinyMCE.

I would like to set the content of the specific textarea, but I can\'t find how.

I have tryed this:

Answer 1

The following works with tinymce version 4, and doesn't show the editor as a textarea while it's being dragged:

function initializeEditors() {
    var editorContent = {};
    $("#photo-list").sortable({
        start: function (e, ui) {
            $('.attachment-info').each(function () {
                var id = $(this).attr('id');
                editorContent[id] = tinyMCE.get(id).getContent();
            });
        },
        stop: function (e, ui) {
            $('.attachment-info').each(function () {
                var id = $(this).attr('id');
                tinymce.execCommand('mceRemoveEditor', false, id);
                tinymce.execCommand('mceAddEditor', true, id);
                tinyMCE.get(id).setContent(editorContent[id]);
            });
        }
    });
}