userContext = workerID;
WorkerService.Delete(workerID, onDeleteSuccceed, onDeleteError, userContext );
function onDeleteSuccceed(userContext )
{
alert(userContext ); // null
}
原因: 尽管WorkerService.Delete, 没有返回值, 也要在回调函数中添加result 参数.
function onDeleteSuccceed(result, userContext )
{
alert(userContext ); // OK
}