ckeditor设置内容不可编辑

var editor=CKEDITOR.instances.a_content;
try{
     editor.setReadOnly(true);
}catch (e) {}

// 2018-06-13 update opCommand是ID
// 1.从可编辑模式到只读
var editor = CKEDITOR.instances.opCommand;
if (editor) {
     editor.setReadOnly(true);
} else {
     CKEDITOR.on('instanceReady', function (e) {
          e.editor.setReadOnly(true);
     });
}
// 2.从只读模式到可编辑
var editor = CKEDITOR.instances.opCommand;
if (editor) {
     editor.setReadOnly(false);
} else {
     CKEDITOR.on('instanceReady', function (e) {
          e.editor.setReadOnly(false);
     });
}