按下btn后PFQueryTableViewController重新加载表

Using Parse, after I'm logged in I am presented PFQueryTableViewController that displays a list of tasks and another detail view controller that allows me to edit the task detail and segue back. The issue right now is that the PFQueryTableViewController does not reflect the new changes after I finished editing and popping the task detail view off the stack. However the table view list does get updated when I go back to the login screen(view before the PFQueryTableViewController) and re-enter the table view again. I've tried the following:Using Parse, after I'm logged in I am presented