How do I set a centered or stretched background image?

Question

I have universal app. In that app I need the background image to be centered or stretched. That way when I rotate the device or switch it the image displays correctly.

Here is my code in viewDidLoad:

self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"tux.png"]]

Can anyone tell me how to accomplish this?

Answer 1

I think you can't easily make it centered with backgroundColor. You may:

• Stretch it before setting the image as backgroundColor, see How to fill background image of an UIView.

• Create a customized UIView subclass and draw the background image yourself by overriding drawRect: method;

• Or add a UIImageView to you view as the background. See "UIView Class Reference: Alternatives to Subclassing":

  Image-based backgrounds - For views that display relatively static content, consider using a UIImageView object with gesture recognizers instead of subclassing and drawing the image yourself. Alternatively, you can also use a generic UIView object and assign your image as the content of the view’s CALayer object.