Problems encountered today, solve the UITableView page above the content is first covered by the navigation bar, and then move down the problem (lazy loading sometimes not good!)

Today we need to connect the interface to the colleague's code, but find a problem, the coordinate system has changed. In general, we will now create the UITableView in the viewdidload, but this time I was viewdidload to send an HTTP request to create, and then caused the request back UITableView the content of the page is first moved up by the navigation bar overlay, Then I moved to the position I specified, I have been unable to, tried and tried again, the reason is that I did not create UITableView in the Viewdidload the first time, in the request back to create, which led to UITableView on the page content Y coordinate value from 0 to 64, This causes the navigation bar to be overwritten first and then offset downward.   (More ridiculous is, I actually still on the tableview with lazy loading, haha, embarrassed ~) can, sleep. Hao elder brother to resign, wish him to find a better job, together refueling ~

Problems encountered today, solve the UITableView page above the content is first covered by the navigation bar, and then move down the problem (lazy loading sometimes not good!)