UIView Background Gradient With Interface Builder View
ios, ios6
Solution
I faced the same problem, but finally figured out that the UIView hasn't been created at the point in the code where you're trying to set background gradient which I guess in your case might be one of the following -viewDidLoad or -viewWillAppear because of which
self.containerView.bounds will be {{0, 0}, {0, 0}}
Instead, you should set the gradient layer inside
viewDidAppear
at which point the views have been created.
Problem
I want to use a gradient as the background for a UIView. I know this is typically done with images and the `backgroundColor` property. However, I want to learn how to do this in code. Using https://stackoverflow.com/a/1931498/99683 I can create a `UIView` programmatically and give it a gradient layer. This works great. ``` UIView *view = [[UIView alloc] initWithFrame:CGRectMake(20, 340, 280, 100)]; CAGradientLayer *gradient = [CAGradientLayer layer]; gradient.frame = view.bounds; gradient.colors = [NSArray arrayWithObjects:(id)[[UIColor redColor] CGColor], (id)[[UIColor yellowColor] CGColor], nil]; [view.layer insertSublayer:gradient atIndex:0]; [self.view addSubview:view]; ``` However, if I place a view in Interface Builder (with background set to clear) and try the same thing the gradient never shows up. ``` CAGradientLayer *gradient2 = [CAGradientLayer layer]; gradient2.frame = self.containerView.bounds; gradient2.colors = [NSArray arrayWithObjects:(id)[[UIColor blueColor] CGColor], (id)[[UIColor greenColor] CGColor], nil]; [self.containerView.layer insertSublayer:gradient2 atIndex:0]; ``` Is there something else I need to do in IB or code to make this work?