self.view.layer.shouldRasterize = YES; self.view.layer.rasterizationScale = UIScreen.mainScreen.scale; I was recently having some issues with slow CALayer shadows, and that simple line of code fixed up everything for me!
Apple has introduced new classes UIVisualEffectView and more to add translucency and blur effect on views from iOS 8.0 release. Here how you can use it to add a blur effect to navigation bar or any other UIView: Swift 5 func addBlurEffect() { let bounds = self.navigationController?.navigationBar.bounds let visualEffectView = UIVisualEffectView(effect: UIBlurEffect(style: .light)) visualEffectView.frame = … Read more
Example code: [[UIBarItem appearance] setTitleTextAttributes: [NSDictionary dictionaryWithObjectsAndKeys: [UIColor colorWithRed:220.0/255.0 green:104.0/255.0 blue:1.0/255.0 alpha:1.0], UITextAttributeTextColor, [UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0], UITextAttributeTextShadowColor, [NSValue valueWithUIOffset:UIOffsetMake(0, 1)], UITextAttributeTextShadowOffset, [UIFont fontWithName:@”AmericanTypewriter” size:0.0], UITextAttributeFont, nil] forState:UIControlStateNormal];
The view debugger reveals what’s going on with this bug. The contents of the navigation bar are being copied. Here’s what the navigation bar looks like before you show the search: And here’s what it looks like afterwards: The two replicant views and the extra UILabel are the problem. I don’t know what they’re doing … Read more
I managed to workaround the new transition type by creating a category for UINavigationController. In my case I needed to revert it to the old transition style because I have transparent viewControllers that slide over a static background. UINavigationController+Retro.h @interface UINavigationController (Retro) – (void)pushViewControllerRetro:(UIViewController *)viewController; – (void)popViewControllerRetro; @end UINavigationController+Retro.m #import “UINavigationController+Retro.h” @implementation UINavigationController (Retro) – … Read more
You can create a NSMutableArray from the navigationController’s array of viewcontrollers and insert new viewController before the current one. Then set the viewControllers array without animation and pop back. UIViewController *newVC = …; NSMutableArray *vcs = [NSMutableArray arrayWithArray:self.navigationController.viewControllers]; [vcs insertObject:newVC atIndex:[vcs count]-1]; [self.navigationController setViewControllers:vcs animated:NO]; [self.navigationController popViewControllerAnimated:YES];
You need to use: [self.navigationController popToRootViewControllerAnimated:YES]; This will bring you back to the root view controller. If you want to navigate back to previous view controller, you should implement: [self.navigationController popViewControllerAnimated:YES];
I have found that when using custom back buttons, the interactive pop gesture stops working (my take is that Apple cannot foresee how your custom back button will behave, so they disable the gesture). To fix this, as other mentioned before, you can set the interactivePopGestureRecognizer.delegate property to nil. In Swift, this can easily be … Read more
TL;DR I made a category on UIViewController that hopefully fixes this issue for you. I can’t actually reproduce the navigation bar corruption on a device, but I can do it on the simulator pretty frequently, and this category solves the problem for me. Hopefully it also solves it for you on the device. The Problem, … Read more
I don’t mean to be rude, but this is really well documented. A google search or even an Apple documentation search on UINavigationController will turn up exactly what you need. To programmatically pop the current view controller you use: [[self navigationController] popViewControllerAnimated:YES]; To pop to a specific view controller, you use: [[self navigationController] popToViewController:controller animated:YES]; … Read more