IPhone : setting vertical spacing to dynamically changing element in iOS xcode 6

I made the orange UIView square according to the width of a device screen. something like this :

CGRect squareFrame = CGRectMake(0, 0, screenWidth, screenWidth);
_uiview = [[DrawSchedule alloc]initWithFrame:squareFrame];
[self.view addSubview: _uiview];

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  I want the yellow UILabel to always stick to the orange UIView.

  
  


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  I didn't put any size constraints on the orange UIView because it's resized programatically..

  
  


• So here is where I am having trouble setting the position of the yellow UILabel.

How can I accomplish this? Does this have to be done programatically only?

Because.. I have multiple UILabels that should be positioned below the yellow UILabel later on.. Will i have to position all of them programatically?