stacking two UITableViews in a single view programmatically?

i'd like to stack two UITableViews in a single view. i can do this in interface builder, however, i would like to do this programmatically in code.

in my main UIViewController, i create two UITableViewControllers in my viewDidLoad method. i thought at first i could do this b开发者_开发知识库y:

[self.view addSubView:controller1.view];
[self.view addSubView:controller2.view];

but this only shows the 2nd view. i've also tried:

[self.view addSubview:controller1.view];
[controller1.view addSubview:controller2.view];

but it still doesn't do what interface builder did above.

UPDATE

i want to accomplish this:

two table views

which i did in interface builder:

xib

but in code.

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What is the reason to create two UITableViewControllers? Simply create two UITableView objects and manipulate them.

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Overlapped? Did you set their frame different, in order to see them?

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controller1.view.frame = CGRectMake(0,0,320,75);
controller2.view.frame = CGRectMake(0,75,320,385);

In a rectangle the values are measured from the upper left corner: x,y,w,h.