tmro

Today I created a UIView subclass that belongs to my own UIViewController.

In my UIView drawRect method I create a few components:  a UILabel, a UITextField and a UIButton and then I add them all via [self addSubview: component]. 

The application built and ran successfully but I then discovered that with the exception of the UILabel the other components only had their shape "drawn" on the screen but the default labels where not actually displayed.

After a bit of unsuccessful googling and forum digging I decided to move all the code from drawRect to the constructor since nothing really made sense. To my surprise that fixed it. Fortunately I then decided that I cannot allow for all that code to be in the init method so I did some API digging and found three methods that looked promising. I then tried them all and one actually solved my problem.

So behold the scientifically discovered solution to all programmatically defined GUIs: the  UIView's layoutIfNeeded method! Append all your subviews and once you're done just call it.

Cheers…