uiview-hierarchy

Is there a way to use [self.view recursiveDescription] in Swift? I am trying to use this method but I am getting the following error: 'UIView' does not have a member named 'recursiveDescription' Any suggestions? In order to access private / undocumented Objective-C API (like the -recursiveDescription method on UIView ) from Swift you can do the following: Create a new Objective-C category on the class the private method is defined in (e.g. UIView ). Hit Yes if Xcode asks you about configuring an bridging header. (If you have already an bridging header in your project this step will be skipped)

I am getting following warning when I try to present a ActivityController on navigation controller, Attempt to present <UIActivityViewController: 0x15be1d60> on <UINavigationController: 0x14608e80> whose view is not in the window hierarchy! I have tried to present view controller by following code, UIActivityViewController * activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:applicationActivities]; activityController.excludedActivityTypes = excludeActivities; UIViewController *vc = self.view.window.rootViewController; [vc

I have a custom UIView subclass which is being initialized via a nib. In -awakeFromNib , I'm creating a subview and attempting to center it in its superview. [self setInteralView: [[UIView alloc] init]]; [[self internalView] addConstraint: [NSLayoutConstraint constraintWithItem: [self internalView] attribute: NSLayoutAttributeCenterX relatedBy: NSLayoutRelationEqual toItem: self attribute: NSLayoutAttributeCenterX multiplier: 1 constant: 0]]; This breaks, and causes the following output: 2013-08-11 17:58:29.628 MyApp[32414:a0b] The view hierarchy is not prepared for the constraint:

I want to list out all the subviews in a UIViewController . I tried self.view.subviews , but not all of the subviews are listed out, for instance, the subviews in the UITableViewCell are not found. Any idea? You have to recursively iterate the sub views. - (void)listSubviewsOfView:(UIView *)view { // Get the subviews of the view NSArray *subviews = [view subviews]; // Return if there are no subviews if ([subviews count] == 0) return; // COUNT CHECK LINE for (UIView *subview in subviews) { // Do what you want to do with the subview NSLog(@"%@", subview); // List the subviews of subview [self