I'm currently trying to place a table view and search bar inside a popover but I'm getting a really weird bug. Whenever I click on the search bar, the cancel button animates in and the bar promptly lowers about the size of a status bar.
I've tried playing around with the UIBarPosition delegate, but that doesn't do anything either. I've tried just about everything I can think of so I thought I'd ask your help. Here's the code I use in the UITableViewController to add the search bar to the table header:
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self)
{
searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, popoverWidth, singleRowHeight)];
searchBar.delegate = self;
searchBar.showsScopeBar= YES;
searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self];
searchDisplayController.delegate = self;
searchDisplayController.searchResultsDataSource = self;
searchDisplayController.searchResultsDelegate = self;
searchDisplayController.searchResultsTableView.rowHeight = singleRowHeight;
self.automaticallyAdjustsScrollViewInsets = NO;
self.tableView.tableHeaderView = searchBar;
return self;
}
- (UIBarPosition)positionForBar:(id<UIBarPositioning>)bar
{
return UIBarPositionTop;
}
Thanks!
according to Extra space above search bar when UISearchDisplayController is active
- (void)viewDidLoad {
[super viewDidLoad];
if ([self respondsToSelector:#selector(edgesForExtendedLayout:)]) { /// iOS 7 or above
self.edgesForExtendedLayout = UIRectEdgeNone;
}
}
I have an iOS 7 app where I am setting a custom back button like this:
UIImage *backButtonImage = [UIImage imageNamed:#"back-button"];
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
[backButton setImage:backButtonImage forState:UIControlStateNormal];
backButton.frame = CGRectMake(0, 0, 20, 20);
[backButton addTarget:self
action:#selector(popViewController)
forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
viewController.navigationItem.leftBarButtonItem = backBarButtonItem;
But this disables the iOS 7 "swipe left to right" gesture to navigate to the previous controller. Does anyone know how I can set a custom button and still keep this gesture enabled?
EDIT:
I tried to set the viewController.navigationItem.backBarButtonItem instead, but this doesn't seem to show my custom image.
IMPORTANT:
This is a hack. I would recommend taking a look at this answer.
Calling the following line after assigning the leftBarButtonItem worked for me:
self.navigationController.interactivePopGestureRecognizer.delegate = self;
Edit:
This does not work if called in init methods. It should be called in viewDidLoad or similar methods.
Use the backIndicatorImage and backIndicatorTransitionMaskImage properties of the UINavigationBar if at all possible. Setting these on an a UIAppearanceProxy can easily modify behavior across your application. The wrinkle is that you can only set those on ios 7, but that works out because you can only use the pop gesture on ios 7 anyway. Your normal ios 6 styling can remain intact.
UINavigationBar* appearanceNavigationBar = [UINavigationBar appearance];
//the appearanceProxy returns NO, so ask the class directly
if ([[UINavigationBar class] instancesRespondToSelector:#selector(setBackIndicatorImage:)])
{
appearanceNavigationBar.backIndicatorImage = [UIImage imageNamed:#"back"];
appearanceNavigationBar.backIndicatorTransitionMaskImage = [UIImage imageNamed:#"back"];
//sets back button color
appearanceNavigationBar.tintColor = [UIColor whiteColor];
}else{
//do ios 6 customization
}
Trying to manipulate the interactivePopGestureRecognizer's delegate will lead to a lot of issues.
I saw this solution http://keighl.com/post/ios7-interactive-pop-gesture-custom-back-button/ which subclasses UINavigationController. Its a better solution as it handles the case where you swipe before the controller is in place - which causes a crash.
In addition to this I noticed if you do a swipe on the root view controller (after pushing on one, and back again) the UI becomes unresponsive (also same problem in answer above).
So the code in the subclassed UINavigationController should look like so:
#implementation NavigationController
- (void)viewDidLoad {
[super viewDidLoad];
__weak NavigationController *weakSelf = self;
if ([self respondsToSelector:#selector(interactivePopGestureRecognizer)]) {
self.interactivePopGestureRecognizer.delegate = weakSelf;
self.delegate = weakSelf;
}
}
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {
// Hijack the push method to disable the gesture
if ([self respondsToSelector:#selector(interactivePopGestureRecognizer)]) {
self.interactivePopGestureRecognizer.enabled = NO;
}
[super pushViewController:viewController animated:animated];
}
#pragma mark - UINavigationControllerDelegate
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animate {
// Enable the gesture again once the new controller is shown
self.interactivePopGestureRecognizer.enabled = ([self respondsToSelector:#selector(interactivePopGestureRecognizer)] && [self.viewControllers count] > 1);
}
#end
I use
[[UINavigationBar appearance] setBackIndicatorImage:[UIImage imageNamed:#"nav_back.png"]];
[[UINavigationBar appearance] setBackIndicatorTransitionMaskImage:[UIImage imageNamed:#"nav_back.png"]];
[UIBarButtonItem.appearance setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -64) forBarMetrics:UIBarMetricsDefault];
Here is swift3 version of Nick H247's answer
class NavigationController: UINavigationController {
override func viewDidLoad() {
super.viewDidLoad()
if responds(to: #selector(getter: interactivePopGestureRecognizer)) {
interactivePopGestureRecognizer?.delegate = self
delegate = self
}
}
override func pushViewController(_ viewController: UIViewController, animated: Bool) {
if responds(to: #selector(getter: interactivePopGestureRecognizer)) {
interactivePopGestureRecognizer?.isEnabled = false
}
super.pushViewController(viewController, animated: animated)
}
}
extension NavigationController: UINavigationControllerDelegate {
func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
interactivePopGestureRecognizer?.isEnabled = (responds(to: #selector(getter: interactivePopGestureRecognizer)) && viewControllers.count > 1)
}
}
extension NavigationController: UIGestureRecognizerDelegate {}
I also hide the back button, replacing it with a custom leftBarItem.
Removing interactivePopGestureRecognizer delegate after push action worked for me:
[self.navigationController pushViewController:vcToPush animated:YES];
// Enabling iOS 7 screen-edge-pan-gesture for pop action
if ([self.navigationController respondsToSelector:#selector(interactivePopGestureRecognizer)]) {
self.navigationController.interactivePopGestureRecognizer.delegate = nil;
}
navigationController.interactivePopGestureRecognizer.delegate = (id<UIGestureRecognizerDelegate>)self;
This is from http://stuartkhall.com/posts/ios-7-development-tips-tricks-hacks, but it causes several bugs:
Push another viewController into the navigationController when swiping in from the left edge of the screen;
Or, swipe in from the left edge of the screen when the topViewController is popping up from the navigationController;
e.g. When the rootViewController of navigationController is showing, swipe in from the left edge of the screen, and tap something(QUICKLY) to push anotherViewController into the navigationController, then
The rootViewController does not respond any touch event;
The anotherViewController will not be shown;
Swipe from the edge of the screen again, the anotherViewController will be shown;
Tap the custom back button to pop the anotherViewController, crash!
So you must implement UIGestureRecognizerDelegate method in self.navigationController.interactivePopGestureRecognizer.delegate like this:
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
if (gestureRecognizer == navigationController.interactivePopGestureRecognizer) {
return !navigationController.<#TODO: isPushAnimating#> && [navigationController.viewControllers count] > 1;
}
return YES;
}
Try self.navigationController.interactivePopGestureRecognizer.enabled = YES;
I did not write this, but the following blog helped a lot and solved my issues with custom navigation button:
http://keighl.com/post/ios7-interactive-pop-gesture-custom-back-button/
In summary, he implements a custom UINavigationController that uses the pop gesture delegate. Very clean and portable!
Code:
#interface CBNavigationController : UINavigationController <UINavigationControllerDelegate, UIGestureRecognizerDelegate>
#end
#implementation CBNavigationController
- (void)viewDidLoad
{
__weak CBNavigationController *weakSelf = self;
if ([self respondsToSelector:#selector(interactivePopGestureRecognizer)])
{
self.interactivePopGestureRecognizer.delegate = weakSelf;
self.delegate = weakSelf;
}
}
// Hijack the push method to disable the gesture
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if ([self respondsToSelector:#selector(interactivePopGestureRecognizer)])
self.interactivePopGestureRecognizer.enabled = NO;
[super pushViewController:viewController animated:animated];
}
#pragma mark UINavigationControllerDelegate
- (void)navigationController:(UINavigationController *)navigationController
didShowViewController:(UIViewController *)viewController
animated:(BOOL)animate
{
// Enable the gesture again once the new controller is shown
if ([self respondsToSelector:#selector(interactivePopGestureRecognizer)])
self.interactivePopGestureRecognizer.enabled = YES;
}
Edit. Added fix for problems when a user tries to swipe left on a root view controller:
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
if ([self respondsToSelector:#selector(interactivePopGestureRecognizer)] &&
self.topViewController == [self.viewControllers firstObject] &&
gestureRecognizer == self.interactivePopGestureRecognizer) {
return NO;
}
return YES;
}
RootView
override func viewDidAppear(_ animated: Bool) {
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false
}
ChildView
override func viewDidLoad() {
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = true
self.navigationController?.interactivePopGestureRecognizer?.delegate = self
}
extension ChildViewController: UIGestureRecognizerDelegate {}
Use this logic to keep enable or disable the swipe gesture..
- (void)navigationController:(UINavigationController *)navigationController
didShowViewController:(UIViewController *)viewController
animated:(BOOL)animate
{
if ([self.navigationController respondsToSelector:#selector(interactivePopGestureRecognizer)])
{
if (self.navigationController.viewControllers.count > 1)
{
self.navigationController.interactivePopGestureRecognizer.enabled = YES;
}
else
{
self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}
}
}
I had a similar problem where I was assigning the current view controller as the delegate for the interactive pop gesture, but would break the gesture on any views pushed, or views underneath the view in the nav stack. The way I solved this was to set the delegate in -viewDidAppear, then set it to nil in -viewWillDisappear. That allowed my other views to work correctly.
Imagine we are using Apple's default master/detail project template, where master is a table view controller and tapping on it will show the detail view controller.
We want to customize the back button that appears in the detail view controller. This is how to customize the image, image color, text, text color, and font of the back button.
To change the image, image color, text color, or font globally, place the following in a location that is called before any of your view controllers are created (e.g. application:didFinishLaunchingWithOptions: is a good place).
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UINavigationBar* navigationBarAppearance = [UINavigationBar appearance];
// change the back button, using default tint color
navigationBarAppearance.backIndicatorImage = [UIImage imageNamed:#"back"];
navigationBarAppearance.backIndicatorTransitionMaskImage = [UIImage imageNamed:#"back"];
// change the back button, using the color inside the original image
navigationBarAppearance.backIndicatorImage = [[UIImage imageNamed:#"back"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
navigationBarAppearance.backIndicatorTransitionMaskImage = [UIImage imageNamed:#"back"];
// change the tint color of everything in a navigation bar
navigationBarAppearance.tintColor = [UIColor greenColor];
// change the font in all toolbar buttons
NSDictionary *barButtonTitleTextAttributes =
#{
NSFontAttributeName: [UIFont fontWithName:#"HelveticaNeue-Light" size:12.0],
NSForegroundColorAttributeName: [UIColor purpleColor]
};
[[UIBarButtonItem appearance] setTitleTextAttributes:barButtonTitleTextAttributes forState:UIControlStateNormal];
return YES;
}
Note, you can use appearanceWhenContainedIn: to have more control over which view controllers are affected by these changes, but keep in mind that you can't pass [DetailViewController class], because it is contained inside a UINavigationController, not your DetailViewController. This means you will need to subclass UINavigationController if you want more control over what is affected.
To customize the text or the font/color of a specific back button item, you must do so in the MasterViewController (not the DetailViewController!). This seems unintuitive because the button appears on the DetailViewController. However once you understand that the way to customize it is by setting a property on a navigationItem, it begins to make more sense.
- (void)viewDidLoad { // MASTER view controller
[super viewDidLoad];
UIBarButtonItem *buttonItem = [[UIBarButtonItem alloc] initWithTitle:#"Testing"
style:UIBarButtonItemStylePlain
target:nil
action:nil];
NSDictionary *barButtonTitleTextAttributes =
#{
NSFontAttributeName: [UIFont fontWithName:#"HelveticaNeue-Light" size:12.0],
NSForegroundColorAttributeName: [UIColor purpleColor]
};
[buttonItem setTitleTextAttributes:barButtonTitleTextAttributes forState:UIControlStateNormal];
self.navigationItem.backBarButtonItem = buttonItem;
}
Note: attempting to set the titleTextAttributes after setting self.navigationItem.backBarButtonItem doesn't seem to work, so they must be set before you assign the value to this property.
Create a class 'TTNavigationViewController' which is subclass of 'UINavigationController' and make your existing navigation controller of this class either in storyboard/class, Example code in class -
class TTNavigationViewController: UINavigationController, UIGestureRecognizerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.setNavigationBarHidden(true, animated: false)
// enable slide-back
if self.responds(to: #selector(getter: UINavigationController.interactivePopGestureRecognizer)) {
self.interactivePopGestureRecognizer?.isEnabled = true
self.interactivePopGestureRecognizer?.delegate = self
}
}
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}}
I currently have a table view controller and have placed a UISearchDisplayController on top or above the my table view controller inside the interface builder. Inside the viewDidLoad of my implementation file I go ahead and assign the searchbar to the navigationItem.titleView. The problem that I now have is that there is a bit more space in the first table view cell because it still thinks that the searchdisplaycontroller is there. You can see it here: http://imgur.com/u6cQew2
Here is code:
.h file
#interface searchTableViewController : UITableViewController <UISearchBarDelegate>
{
UISearchBar *searchDrugBar;
}
#property (nonatomic, strong) IBOutlet UISearchBar *searchDrugBar;
.m file
- (void)viewDidLoad
{
[super viewDidLoad];
searchDrugBar.placeholder = #"Search for info";
self.navigationItem.titleView = self.searchDisplayController.searchBar;
[self.searchDisplayController setActive: YES animated: YES];
[self.searchDisplayController.searchBar becomeFirstResponder];
}
Any suggestions or ideas? Thanks in advance!
Try to create the searchBar programatically, I don't see any added value from creating it in the storyboard unless you have your own reason.
First remove it from the storyboard then:
- (void)viewDidLoad
{
[super viewDidLoad];
searchDrugBar = [[UISearchBar alloc] init];
searchDrugBar.frame = CGRectMake(0, 0, 200,44); // it could be unnecessary
searchDrugBar.delegate = self;
searchDrugBar.placeholder = #"Search for info";
self.navigationItem.titleView = self.searchDisplayController.searchBar;
[self.searchDisplayController setActive: YES animated: YES];
[self.searchDisplayController.searchBar becomeFirstResponder];
}
self.navigationItem.titleView = self.searchBarTop;
=> to pur searchbar left/right :-
UIBarButtonItem *searchBarItem = [[UIBarButtonItem alloc] initWithCustomView:searchBar];
self.navigationItem.rightBarButtonItem = searchBarItem;
- (void)viewDidLoad
{
...
self.searchDisplayController.displaysSearchBarInNavigationBar = true;
self.navigationItem.leftBarButtonItem = [UIBarButtonItem new];
...
}
==> Here Given more Reference It might be Useful I hope it work for You..
How to animate add UISearchBar on top of UINavigationBar
I wish to add a UIToolbar programmatically to a view when a user clicks on a button (in my case when they zoom in on a photo).
It seems to work fine when I create the toolbar in the click method and add to the subview but if I create the toolbar in the viewDidLoad method, assign it to an instance variable,and add that instance variable later to the subview on click, nothing appears. The debugger shows that the instance variable is a UIToolbar and is not null. I didn't want to create and destroy the same toolbar on every click so I thought it was better just to keep it as an instance variable that I add and remove from the view as needed. Is this the right approach?
Why is it visible in the one case and not the other.
Setup
#synthesize toolBar;
- (UIToolbar*)createToolbar
{
UIToolbar* toolbar = [[UIToolbar alloc] init];
toolbar.frame = CGRectMake(0, self.view.frame.size.height - 44, self.view.frame.size.width, 44);
UIBarButtonItem *shareButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:#selector(sharePhoto:)];
NSArray *buttonItems = [NSArray arrayWithObjects:shareButton,nil];
[toolbar setItems:buttonItems];
return toolbar;
}
This works
- (void) clickMyButton {
toolBar = [self createToolbar];
[self.view addSubview:toolBar];
}
This doesn't show anything
- (void)viewDidLoad
{
[super viewDidLoad];
toolBar = [self createToolbar];
}
- (void) clickMyButton {
[self.view addSubview:toolBar];
}
Why doesn't it work in the latter case
The problem is that when viewDidLoad gets called, it is not guaranteed that the frames for your view and subviews are set. Try calling [self createToolbar] from viewWillAppear or viewDidAppear instead.
I have a rootViewController, in it's viewDidLoad method， I initialized another two ViewController2* object and their views as subview of rootViewController.view, then I set first ViewController2* controller.view.hidden = YES.
Then, on v1 has a button handler, when touch it, it present a UINavigationController, after that touch 'dismiss' button call dismissViewControllerAnimated on v1.
The question is: when dismiss complete, the two of ViewController2* fire viewWillAppear. How to make it only fire the viewWillAppear on the visible one, but not on the hidden one?
the rootViewController's implementation:
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.v1 = [[ViewController2 alloc] init];
self.v1.title = #"v1";
[self.view addSubview:self.v1.view];
self.v1.view.hidden = YES;
self.v2 = [[ViewController2 alloc] init];
self.v2.title = #"v2";
[self.view addSubview:self.v2.view];
UIButton * btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[btn setTitle:#"POP" forState:UIControlStateNormal];
[btn sizeToFit];
[btn addTarget:self action:#selector(touchHandler:) forControlEvents:UIControlEventTouchDown];
[self.view addSubview:btn];
}
- (void)touchHandler:(id)sender {
UINavigationController * nc= [[UINavigationController alloc] initWithRootViewController:[[UIViewController alloc] initWithNibName:nil bundle:nil]];
((UIViewController *)[nc.viewControllers objectAtIndex:0]).navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"dismiss" style:UIBarButtonItemStyleBordered target:self action:#selector(dismissHandler:)];
[self presentViewController:nc animated:YES completion:nil];
}
- (void) dismissHandler:(id)sender
{
[self dismissViewControllerAnimated:YES completion:nil];
}
#end
ViewController2:
#implementation ViewController2
- (void)viewWillAppear:(BOOL)animated
{
NSLog(#"%#",self.title);
}
#end
viewWillAppear will fire on your UIViewController's, even if the view controllers view is set hidden=YES.
You can surely test if (self.view.hidden == YES) in your viewWillAppear delegate method if you want to prevent some expensive operation from occurring, but beware that if you later make that view un-hidden, that viewWillAppear won't fire then.
Simple, the reason why those methods are called is because the viewController's view is part of the main window's view hierarchy. This means that it has a superview that has a superview that has a superview and so on until that superview is the main window.
Instead of hiding and unhiding the viewController views, you should instead add and remove them from their superview. Also, to make sure that viewWillAppear and viewDidAppear are called correctly at the correct times, take a look at ViewController Containment:
http://www.cocoanetics.com/2012/04/containing-viewcontrollers/