I have a UISearchBar with some customizations and I create a UISearchDisplayController like this
self.searchController = [[UISearchDisplayController alloc]initWithSearchBar:self.searchBar contentsController:self];
I want the search bar to appear on navigation bar so I also set
self.searchDisplayController.displaysSearchBarInNavigationBar = true;
Now the search bar shows in the Navigation Bar, but I want to show the search bar of my UISearchDisplayController only when I tap on a Navigation Bar Button Item. I want to have a behaviour like:
Hide the search bar initially
Show search bar when a navigation bar button is clicked
Hide the search bar when I tap "Cancel" button of
the search bar
I tried to hide/unhide it like:
self.searchDisplayController.searchBar.hidden = YES;
but the code doesn't seem working. I've spent a lot time searching the solution to have the behaviour I want and still no luck. Thanks.
Try this out:
CGRect searchFrame = self.searchDisplayController.searchBar.frame;
searchFrame.size.height = 0;
self.searchDisplayController.searchBar.frame = searchFrame;
self.searchDisplayController.searchBar.hidden = YES;
EDIT: I just tried with below code and it worked. See if this helps you!
- (void)viewDidLoad {
[super viewDidLoad];
[self.searchDisplayController.searchContentsController.navigationController setNavigationBarHidden:YES animated:YES];
[self performSelector:#selector(test) withObject:nil afterDelay:2.0];
}
- (void)test {
[self.searchDisplayController.searchContentsController.navigationController setNavigationBarHidden:NO animated:YES];
}
Maybe this is a suitable solution?
To complete task 1, in your TVC lifecycle method viewDidLoad, insert a non-animated scroll that places the search bar beneath the Nav bar...
- (void)viewDidLoad {
[super viewDidLoad];
// Scroll off screen the search bar (44 points)
[[self tableView] setContentOffset:CGPointMake(0, 44)];
// other code for method
}
To complete task 2, in your TVC create a custom action method associated with a UIBarButtonItem, that effectively hides the Nav bar, at the same time revealing the search bar...
- (IBAction)hideNavBar:(UIBarButtonItem *)sender {
[[self navigationController] setNavigationBarHidden:YES animated:YES]
}
To complete task 3, in your TVC use the UISearchDisplayController Delegate method to effectively display the Nav bar and at the same time hide the search bar...
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
[[self navigationController] setNavigationBarHidden:NO animated:YES];
[[self tableView] setContentOffset:CGPointMake(0, 44)];
// You might also like to...
[self setSearchBarText:nil]; // if you are using a property to hold the search bar text
[self setSearchResults:nil]; // if you are using a property to hold the search results
}
When I push my UIViewController to the screen from my previous controller it animates the change. But when it finishes loading it resizes my navigation bar and the jumpy transition makes it look bad. How can I fix this? All I'm doing is hiding the navigation bar in Controller A in viewWillAppear and showing it in Controller B in viewDidLoad.
Ok solved it. In viewDidLoad of Controller B (the view controller I'm pushing) add the following:
UINavigationBar *navigationBar = self.navigationController.navigationBar;
[navigationBar setBackgroundImage:[UIImage new]
forBarPosition:UIBarPositionAny
barMetrics:UIBarMetricsDefault];
[navigationBar setShadowImage:[UIImage new]];
Then in your UIViewController's XIB make a height constraint on the navigation bar and set it to 68 (from testing the actual line seems to fall in between 68 and 69). Smooth as silk.
edit: If anyone has any better ideas please add them. I'll have to modify this solution for screen rotation so its not perfect.
You can do all in your controller A like this:
- (void)viewWillAppear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:NO animated:animated];
[super viewWillDisappear:animated];
}
in my UITableViewControllers I have added navigation bars but the problem is that the Title of the navigation bar intersects with the status bar. Normally I would do "positionForBar" and return UIBarPositioningTopAttached but that only works with UIViewControllers. Thus, I used the "prefersStatusBarHidden" method an return YES. Obviously, this bears a cost to the user since they can't view the time and battery life while they're on those screens while using the app. So is there a way to keep the title navigation bar and the status bar from not overlapping, kinda like in iOS 6?
Here's what i'm talking about:
it doesn't look very clean and i'm trying to fix it
In storyboard click on your UITableViewController then simply click on edit -> embed -> navigation controller. You don't need to use it to navigate anywhere but it will setup your title bar correctly for you.
Try with the code
self.edgesForExtendedLayout = UIRectEdgeNone;
I had the same issue. this fixed it:
credit to: malcolmhall
Its just pushing the nav down but works
// in the .h
#property (strong) UINavigationBar* navigationBar;
//in the .m
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.title = #"Title";
self.navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectZero];
[self.view addSubview:_navigationBar];
[self.navigationBar pushNavigationItem:self.navigationItem animated:NO];
}
-(void)layoutNavigationBar{
self.navigationBar.frame = CGRectMake(0, self.tableView.contentOffset.y, self.tableView.frame.size.width, self.topLayoutGuide.length + 44);
self.tableView.contentInset = UIEdgeInsetsMake(self.navigationBar.frame.size.height, 0, 0, 0);
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
//no need to call super
[self layoutNavigationBar];
}
-(void)viewDidLayoutSubviews{
[super viewDidLayoutSubviews];
[self layoutNavigationBar];
}
In my iOS app, my window's rootViewController is a tab bar controller with the a hierarchy like this:
UITabBarController
UINavigationController 1
FirstContentController
UINavigationController 2
...
UINavigationController 3
...
...
When the user taps a certain row on FirstContentController, an instance of SecondController will be pushed onto its navigation controller. SecondContentController sets hidesBottomBarWhenPushed to YES in its init method and sets self.navigationController.toolbarHidden to NO in viewWillAppear:.
In iOS 6, the user would tap the row in FirstController and SecondController would get pushed onto the nav controller. Because it has hidesBottomBarWhenPushed set, it would hide the tab bar and, by the time the transition animation was complete, SecondController would be on the screen with its toolbar visible.
However, when testing this under iOS 7, hidesBottomBarWhenPushed's behavior seems to have changed. What I see now is:
the tab bar hides, as expected
the toolbar appears, as expected
a gap of unusable space exactly 49 pixels tall (the height of the tab bar) appears between the toolbar and the content view
The gap is completely unusable - it doesn't respond to touches and if i set clipsToBounds to YES on the main view, nothing draws there. After a lot of debugging and examining subview hierarchies, it looks like iOS's autosizing mechanism resizes the view controller's view to a height of 411 (on the iPhone 5). It should be 460 to reach all the way down to the toolbar, but the layout system seems to be including a "ghost" 49-pixel-tall tab bar.
This problem only occurs if the view controller has a tab bar controller as one if its parent containers.
On iOS 7, how can I have the tab bar disappear and a toolbar seamlessly slide into place when a new controller is pushed, and still have the view take up the entire space between the navigation item and the toolbar?
UPDATE
After further investigation, this only happens if SecondController's edgesForExtendedLayout is set to UIRectEdgeNone. However, unless I set that property to UIRectEdgeNone, the view's frame is too long and extends under the toolbar, where it can't be seen or interacted with.
I found that adding the following 2 lines of code in viewDidLoad of SecondViewController (where you want to hide TabBar but show the tool bar) fixes the problem.
self.extendedLayoutIncludesOpaqueBars = YES;
self.edgesForExtendedLayout = UIRectEdgeBottom;
My viewDidLoad of SecondViewController is as follows:
- (void)viewDidLoad {
[super viewDidLoad];
// These 2 lines made the difference
self.extendedLayoutIncludesOpaqueBars = YES;
self.edgesForExtendedLayout = UIRectEdgeBottom;
// The usual configuration
self.navigationController.navigationBar.barStyle = UIBarStyleBlack;
self.navigationController.navigationBar.translucent = NO;
self.navigationController.toolbarHidden = NO;
self.navigationController.toolbar.barStyle = UIBarStyleBlack;
self.navigationController.toolbar.translucent = NO;
.
.
}
But you need to fix the frame of the view manually as this causes the size to be (320x504). Which means it extends even behind the tool bar. If this is not a concern for you then this solution should work.
You will not like this answer This is not the answer you want, but after some research on hiding the tab bar in iOS7, my conclusion is: don't!
Tab bars have never been meant to be hidden - after all why have a UITabBarController if you want to hide the tab bar. The hidesBottomBarWhenPushed on view controllers is for hiding the bottom bar of a navigation controller, not tab bars. From the documentation:
A view controller added as a child of a navigation controller can display an optional toolbar at the bottom of the screen. The value of this property on the topmost view controller determines whether the toolbar is visible. If the value of this property is YES, the toolbar is hidden. If the value of this property is NO, the bar is visible.
Moreover, you are warned not to modify the tab bar object directly. Again, from the documentation:
You should never attempt to manipulate the UITabBar object itself stored in this property.
This is exactly what you are doing when setting it to hidden.
In iOS6 this has worked, but now in iOS7, it doesn't. And it seems very error prone to hide it. When you finally manage to hide it, if the app goes to the background and returns, Apple's layout logic overrides your changes.
My suggestion is to display your data modally. In iOS7 you can create custom transitions, so if it is important to you to have a push transition, you can recreate it yourself, although this is a bit over the top. Normal modal transition is something users are familiar, and actually fits this case better than push which hides the tab bar.
Another solution is to use a toolbar instead of a tab bar. If you use the navigation controller's toolbar for your tabs, you can then use hidesBottomBarWhenPushed as you require and it would give you the behavior you expect.
Uncheck "Hide bottoms bars on push" and set your autoconstraints as if there is a tab bar. Then in "ViewDidLoad" of the controller you want to hide the system tab bar, put the following code.
[self.tabBarController.tabBar setFrame:CGRectZero];
This makes sure the tab bar still accepts user interaction yet not visible to users. (other alternatives such as setting it 0 alpha or hidden will render tab bar useless) Now the autoconstaraints will make sure your view displays correctly with the tab bar height as zero.
It's a bug in iOS 7 UIKit due to this particular combination of:
UITabBarController
hidesBottomBarWhenPushed = YES
edgesForExtendedLayout = UIRectEdgeNone
UINavigationController toolbar
You should file a bug with Apple and include your sample code.
To work around the bug you need to remove one of those four conditions. Two likely options:
Fix the layout of your "second" view controller so that it works correctly when edgesForExtendedLayout is set to UIRectEdgeAll. This could be as simple as setting the contentInset on a scroll view.
Don't use UINavigationController's built-in toolbar. Instead, create a separate UIToolBar instance and manually add it to your second view controller's view.
You do have to set the tabBar of the TabBarController to hidden and your view should have autosizing set to flexible height.
With this code it's working:
#implementation SecondController
-(id)init
{
if( (self = [super init]) )
{
}
return self;
}
- (void)viewDidLoad;
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor redColor];
self.view.autoresizingMask = UIViewAutoresizingFlexibleHeight;
self.tabBarController.tabBar.hidden = YES;
}
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
// will log a height of 411, instead of the desired 460
NSLog(#"frame: %#", NSStringFromCGRect(self.view.frame));
}
#end
Or, if you do want to use the hidesBottomBarWhenPushed method, you have to do this before you push the view controller obviously:
-(void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
{
SecondController* controller = [[SecondController alloc] init];
controller.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:controller animated:YES];
}
If using the second method, your viewDidLoad method can get rid of flexible height method as well as tabBarHidden:
- (void)viewDidLoad;
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor redColor];
self.edgesForExtendedLayout = UIRectEdgeNone;
}
See the result:
The key to this conundrum is that the navigationcontroller.view.frame size doesn't change. Going of batkin's Gist here is a gist of my own.
FirstViewController.m
#import "FirstController.h"
#import "SecondController.h"
#implementation FirstController
-(id)init
{
if( (self = [super init]) )
{
self.tabBarItem.title = #"Foo";
self.tabBarItem.image = [UIImage imageNamed:#"Tab Icon.png"];
}
return self;
}
-(NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section
{
return 1;
}
-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
UITableViewCell* cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
cell.textLabel.text = #"Click";
return cell;
}
-(void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
{
SecondController* controller = [[SecondController alloc] init];
self.tabBarController.tabBar.hidden = YES;
[self.navigationController pushViewController:controller animated:YES];
}
#end
SecondViewController.m
#import "SecondController.h"
#implementation SecondController
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.view.backgroundColor = [UIColor redColor];
self.view.clipsToBounds = YES;
/* ENTER VORTEX OF DESPAIR */
// without this, there's no gap, but the view continues under the tool
// bar; with it, I get the 49-pixel gap thats making my life miserable
self.edgesForExtendedLayout = UIRectEdgeNone;
//this resizes the navigation controller to fill the void left by the tab bar.
CGRect newFrame = self.navigationController.view.frame;
newFrame.size.height = newFrame.size.height + 49;
self.navigationController.view.frame = newFrame;
/* EXIT VORTEX OF DESPAIR */
self.navigationController.toolbarItems = #[
[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSave target:nil action:nil]
];
}
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
self.navigationController.toolbarHidden = NO;
// will log a height of 411, instead of the desired 460
NSLog(#"frame: %#", NSStringFromCGRect(self.view.frame));
NSLog(#"frame: %#", NSStringFromCGRect(self.navigationController.view.frame));
}
-(void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
self.tabBarController.tabBar.hidden = NO;
self.navigationController.toolbarHidden = YES;
//this resizes the navigation controller back to normal.
CGRect newFrame = self.navigationController.view.frame;
newFrame.size.height = newFrame.size.height - 49;
self.navigationController.view.frame = newFrame;
//this is optional and resizes the view to fill the void left by the missing toolbar.
CGRect newViewFrame = self.view.frame;
newViewFrame.size.height = newViewFrame.size.height + 49;
self.view.frame = newViewFrame;
}
#end
If you are using Auto Layout,make sure you pin the view to its superview instead of Top Layout Guide or Bottom Layout Guide.
Have you tried to move your call hidesBottomBarWhenPushed in the viewDidLoad or before the secondViewController is pushed?
With ios7, a lot of timing issues appear if you don't do the calls at teh good moment.
You mention that you can fix this by not touching the edgesForExtendedLayout. Is there a necessary reason that the content/controls of the view controller are contained in the root view of the pushed view controller? You might consider wrapping everything in a view that is the first and only child of the main view. Then adjust that view's frame in the viewDidLayoutSubviews of the pushed view controller to avoid having content permanently beneath the toolbar using the top/bottomLayoutGuide of the view controller.
I built a new project using your Gist, and I encased the UITabBarController in a UINavigationController:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
UITabBarController* tabController = [[UITabBarController alloc] init];
tabController.viewControllers = #[
[[UINavigationController alloc] initWithRootViewController:[[FirstViewController alloc] init]],
[[UINavigationController alloc] initWithRootViewController:[[FirstViewController alloc] init]]
];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:tabController];
[navController setNavigationBarHidden:YES];
self.window.rootViewController = navController;
return YES;
}
And to show the SecondViewController, here is what I did:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
SecondViewController* controller = [[SecondViewController alloc] init];
// Reaching the UITabBarViewController's parent navigationController
[self.parentViewController.navigationController pushViewController:controller animated:YES];
}
Finally, in the secondViewController:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.view.backgroundColor = [UIColor redColor];
self.view.clipsToBounds = YES;
// The following line only works in iOS7
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
self.edgesForExtendedLayout = UIRectEdgeNone;
}
[self.navigationItem setRightBarButtonItem:[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSave target:nil action:nil]];
UIBarButtonItem * logoutButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemReply target:nil action:nil];
NSMutableArray * arr = [NSMutableArray arrayWithObjects:logoutButton, nil];
[self setToolbarItems:arr animated:YES];
[self.navigationController setNavigationBarHidden:NO animated:YES];
[self.navigationController setToolbarHidden:NO animated:YES];
}
- (void)viewWillDisappear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES animated:YES];
[self.navigationController setToolbarHidden:YES animated:YES];
}
Here's what it does look:
EDIT: Changed the example and changed the screenshot. Made the example iOS6 compatible.
I manually manage hide/unhide of bottom-tab-bar along with fade animation by
...
[self.tabBarController.tabBar setHidden:NO];
[self.tabBarController.tabBar setAlpha:0.1];
[UIView animateWithDuration:0.2 animations:^{
[self.tabBarController.tabBar setAlpha:1.0];
}];
...
Bottom Toolbar on SecondVC was added in IB. No problem so far. Using Storyboard.
I think you can set SecondController's edgesForExtendedLayout to UIRectEdgeBottom.
This helps me:
Choose you view controller in storyboard -> Go to properties -> Uncheck "Adjust Scroll View Insets"
As #Leo Natan is pointing out, it seems as if hiding the tab bar and showing a toolbar is discouraged.
Nevertheless, there is a very easy solution that is working:
Just check "Under Opaque Bars" in the view controller properties in the storyboard as shown below:
I'm currently customising the navigation bar background image of my iOS app using the UIAppearance proxy. There is a button for switching between two different modes which triggers a notification. This notification will change the background to a different image using again the proxy. My problem is that this change becomes visible only when I go to a different controller and I come back to it. I'm not able to force the update of the navigation bar within the controller.
I've tried this in my MainTabBarController:
- (void) onAppChangedMode: (NSNotification*)notif {
APP_MODE mode = (APP_MODE) [[notif object] integerValue];
// change navigation bar appearance
[[UILabel appearance] setHighlightedTextColor:[UIColor redColor]];
[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:(mode == 0 ? #"navbar.png" : #"navbar2.png")] forBarMetrics:UIBarMetricsDefault];
// trying to update
for (UIViewController* vc in self.viewControllers) {
[vc.navigationController.navigationBar setNeedsDisplay];
}
}
but nothing...it's not working. Any idea how to achieve it?
Thanks!
Just remove views from windows and add they again:
for (UIWindow *window in [UIApplication sharedApplication].windows) {
for (UIView *view in window.subviews) {
[view removeFromSuperview];
[window addSubview:view];
}
}
I just have the same problem, this code will help you:
- (IBAction)btnTouched:(id)sender {
[[UADSwitch appearance]setOnTintColor:[UIColor redColor]];
// Present a temp UIViewController
UIViewController *vc = [[UIViewController alloc]init];
[self presentViewController:vc animated:NO completion:nil];//"self" is an instance of UIViewController
[vc dismissViewControllerAnimated:NO completion:nil];
}
Try this code to change the background image for the current nav bar only:
[self.navigationController.navigationBar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];
Use the above code after changing the UIAppearance. This will force a change in the nav bar of the current controller. The nav bars for the other controllers will be handled by the change in UIAppearance.