View table size and positioning won't change

I have a xib tableview controller and i can't get the size of the table view to shrink so that i may add additional things before the view(I would like to add some buttons). I try changing the frame in viewdidload and viewwillappear but nothing seams so work. I am using

self.tableView.frame = CGRectMake(0, 100, 开发者_开发问答320, 200);

but the view remains in place(just under the navigation bar). What am I doing wrong?

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Why dont you resize in the xib tableView itself? What's preventing you to do that?

EDIT: Why cant you change the height in xib or x and y coordinates? Attaches image should help you do this easily in IB - (make sure to select your tableView and open the right hand sidebar to get this menu. Once right sidebar opens goto - Size Inspector & here you can do this.

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I had the same problem and i realized that my tableView was inside another TableView with its own x and y (so probably i was not able to change it). So you have to make sure that your TableView is a subview of your view or is your main view

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Use a UIViewController, drag and drop a UITableView in it, resize as per your wish and there you've got what you were looking for.