I am working on a UI which has transparent navigation bar. I used this
[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:[UIImage new]];
[self.navigationController.navigationBar setTranslucent:YES];
Now I want the UITableView should start from top instead of offset like 64.
How to achieve that?
You can set it in storyboard or xib property panel.
Or you can do as below:
[self setAutomaticallyAdjustsScrollViewInsets:YES];
[self setEdgesForExtendedLayout:UIRectEdgeAll];
This should be done before viewWillAppear is invoked.
Related
I have a UINavigationController with 3 viewControllers. We know the three viewControllers share a common navigationBar.If I want to set the navigationBar totally transparent. I can put the code in viewWillAppear:
[self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationBar setShadowImage:[UIImage new]];
[self.navigationBar setBarTintColor:[UIColor clearColor]];
self.navigationBar.translucent = YES;
and set it back in viewWillDisappear:
[self setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
[self setShadowImage:nil];
[self setBarTintColor:THEME_COLOR];
self.translucent = NO;
I want to set the UINavigationBar translucent only in viewControllerB, so I put the code in viewControllerB. However, when I popToViewController B, I can see a black bar in the top right of the screen. Since the viewWillAppear is invocated. It seems can not be solved in my case.
I come out with some methods:
use different UINavigationBar.
use different UINavigationController. But UINavigationController can not push a new UINavigationController
Custom UIView like UINavigationBar.
I think above methos is more complicated。
Any ideas thanks!
That black color you see is the background color of main window. You can set background image or color to your main window from AppDelegate didFinishLaunchingWithOptions method (That's totally depends with your design of the view controller B) so that you won't see any difference.
Or else
Simply you can use viewDidAppear instead of using viewWillAppear, but that will have little flick though.
I want remove border of navigation bar. I am using this code in AppDelegate.m
[[UINavigationBar appearance] setBackgroundImage:[[UIImage alloc] init]
forBarPosition:UIBarPositionAny
barMetrics:UIBarMetricsDefault];
[[UINavigationBar appearance] setShadowImage:[[UIImage alloc] init]];
and it works well. It removes border of navigation bar in every view controller.
But i have to remove it for few view controllers.
By placing this code in viewWillAppear of particular view controller, its not working.
Does anyone knows how to do it?
You should set the background image and shadow image of the navigation bar in your select navigations bars and not to use the appearance method. e.g.:
[self.navigationController.navigationBar setBackgroundImage:[UIImage new]
forBarMetrics:UIBarMetricsDefault];
I want to have a translucent navigation bar and display view or controller under it. Through the navigation bar, user can see the content display on the controller.But it always display from y=64 in iOS8. Do you know how to do it?
Put this code in applicationDidFinishLaunchingWithOption
//visible viewcontroller
[[UINavigationBar appearance] setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
//status bar
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
//One line pixel
[[UINavigationBar appearance] setShadowImage:[UIImage new]];
Now I am trying to change UINavigationController background image with my custom Image.
I can change with following codes.
[navigation.navigationBar insertSubview:[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"navController.png"]] atIndex:1];
So I got following pic. That pic is right and show the BarButton.
But when I go to the detailViewController , there is no BackButton. However I can tap without seeing it.
After I back to MainViewController , my UINavigationController Background is happening like following pic.
They are hiding my button. I'm thinking atIndex:1 is making this problem because Index 1 is above 0 and All button Index must be 0.
That's why all buttons are disappearing.
So how can I solve that problem? Please help.
Thanks for your help.
// not supported on iOS4
UINavigationBar *navBar = [purchaseNavController navigationBar];
if ([navBar respondsToSelector:#selector(setBackgroundImage:forBarMetrics:)])
{
[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:#"brnlthr_nav.jpg"] forBarMetrics:UIBarMetricsDefault];
}
Try using the appearance proxy provided by apple
[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:#"your_image"] forBarMetrics:UIBarMetricsDefault];
that will set it for the entire application or you can use
[[self.navigationController.navigationBar appearance] setBackgroundImage:[UIImage imageNamed:#"your_image"]];
i have made a simple design in photoshop
when i tried to put it in Xcode i had some problems with NavigationBar
i used this code to change the UINavigationBar background image (a PNG transparent image):
UINavigationBar *navBar = [[self navigationController]navigationBar];
[navBar setBackgroundImage[UIImageimageNamed:#"navBar2.png"]forBarMetrics:UIBarMetricsDefault]
everything works fine but the problem is that the image appears in the navigationBar without transparency.
please someone help me to fix the transparency issue i search everywhere without any satisfied answer
NB! Im using IOS 5
You might try setting the navigation bar to translucent.
[navBar setTranslucent: YES];
Do you have it in your Storyboard? Try change the style of your navigation bar into black translucent.
What you can do is set the background color of the view of the navigationController the same as the backgrouond color of the main view.
//Set your view's background color
[self.view setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"view_background"]]];
//Set your custom image for the navigationController
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed: #"navigation_bar_image"] forBarMetrics:UIBarMetricsDefault];
//And then set the background color of the navigationController the same as the one of the view
[self.navigationController.view setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"view_background"]]];
[self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationBar setShadowImage:[UIImage new]];
[self.navigationBar setTranslucent:YES];
And make sure you set up tint color to default.