Question

I created a UIButton programatically and I want to add constraint
so that it will stay at the same length from the bottom so it
will look right on both the iPhone 4 and 5.

I know how to do it in Interface Builder but don’t know how to do it programatically.

Answer 1

Put Following line in .pch file

#define IS_IPHONE_5 ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - ( double )568 ) < DBL_EPSILON )

and write code for iPhone 5 as Below

if( IS_IPHONE_5 )
      // Set Fram/ code for iPhone 5
else
     // Set Fram/ code for iPhone 4