iOS what causes a view to not show when added as a subview?

[Chirone]

i have a scroll view and on that scroll view i can add uibuttons and uiimageviews fine using the addSubview method

then when i create an instance of a subclass of UIViewController and add that view to it the view loads but it doesn't show
the viewWillAppear: method doesn't even get called but the viewDidLoad: method does

how is it possible for a view to be added to another view and not show up?

 

[ghayenga]

i have a scroll view and on that scroll view i can add uibuttons and uiimageviews fine using the addSubview method

then when i create an instance of a subclass of UIViewController and add that view to it the view loads but it doesn't show
the viewWillAppear: method doesn't even get called but the viewDidLoad: method does

how is it possible for a view to be added to another view and not show up?

It's hidden, it's off the screen, it's nil.

Without a code sample all we could do is guess wildly.

 

[Chirone]

well, wild guesses are better than none

turns out the frame rectangle was a zero rect

such faults take up so much time to figure out and then you find out that you just needed to insert one line of code... *sigh*

 

[KoolStar]

It will also not show if the frame has not been set.