在不触及屏幕的情况下无法查看表格视图项目

There is some problem in my tableView class I have got the data from my server and can show in table View but problem is that when I have completely got the data from server it never shown in table view until I touched down my screen.. when I touched my screen down I can see my data but I want to see my data when I have got the data.. here is my class ..There is some problem in my tableView class I h