Adjusting Views for iPhone 4/5

Be sure to check the boxes for Autoresize Subviews and change the mode to "Scale to Fill"

Dynamic Keyboards and Views ObjC

Create a view to hold all the text fields and buttons:

Absolute Value ObjC

abs(int), labs(long), llabs(long long),imaxabs(intmax_t), fabsf(float), fabs(double), or fabsl(long double).