Make Background of UIView a Gradient Without Sub Classing

Is there a way to make the background of a UIView a gradient without subclassing it? I'd rather not use an image file to accomplish this either. It just seems obtuse to have to subclass UIView just to draw a gradient for the background.

What is the relationship between UIView"s setNeedsLayout, layoutIfNeeded and layoutSubviews?

Can anyone give a definitive explanation on the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews methods? And an example implementation where all three would be used. Thanks.

What happens to my subView when changing navigation controllers?

Lets say that I add a subView to my view, like this:

insertSubview:belowSubview: in UITableViews

I have a UITableView with UITableViewCell s that are swipable. When a cell is swiped, I want a view to be visible (revealed) underneath that cell. Here's the code that I have:

add uiview at row selection

I want when tab on row a uiview containing two button appear at the center of the cell, so I did the following code

Adding UIView subclass programmatically not drawing itself

I don't understand how this works. If I draw a UIView object to my UIViewController .xib file, then my UIView redraws itself. If I add it to the subView like

Program a "No Photos In Albums” screen

Is there a way to access this screen and edit it for your own program?

iPhone autoresizingmasks

I've been experiencing problems with designing views so that the subviews behave the way I want when using autoresizingmasks (for example, if the status bar size changes, when using the phone as a hotspot etc.). Is there any good documentation that I should definitely read? Apple documents don't seem to help me at least not without some heavy testing of my own.

water effect in a view based application

I'm using a view based application in xcode and I would like to do an effect: water effect like this video .In this video the guy use opengl es And I don't know it it's possible without.