Search Results Visibly Scrolling Underneath the Status Bar - ios

When performing a search on a dataset via a UISearchBar, the search results successfully display in the UITableViewController's UITableView. However, when scrolling down through the results, the UITableView's rows visibly appear underneath the UINavigationBar and the simulator's status bar.
This obviously is not the look that I'm going for. Ideally, I would like the UISearchBar to act as the UITableView's header with all search results being contained below the UISearchBar's scope buttons, but my attempts have been unsuccessful.
Below is the Storyboard setup of the relevant UITableViewController and its UITableView's properties.
Below is the relevant code that I am using to setup the UISearchController and its UISearchBar.
BallotTunesSearchTableViewController.h
#interface BallotTunesSearchTableViewController : UITableViewController <UISearchControllerDelegate, UISearchResultsUpdating, UISearchBarDelegate>
BallotTunesSearchTableViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
self.appDelegate = [[UIApplication sharedApplication] delegate];
// Initialize the search controller
self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
self.searchController.dimsBackgroundDuringPresentation = NO;
// Setup the search bar
self.searchController.searchBar.delegate = self;
self.searchController.searchBar.scopeButtonTitles = [NSMutableArray arrayWithObjects:SongScopeName, ArtistScopeName, AlbumScopeName, nil];
self.tableView.tableHeaderView = self.searchController.searchBar;
}
Update: Note that the UITableViewController is embedded in a UINavigationController, and when setting the translucence of the UINavigationBar to NO, the UISearchBar slides off the view along with the UINavigationBar.
Also note that I am not implementing the UISearchBar in Storyboard (however, I may take that route if I can't get my current setup to work).

After several face palms, it all came down to the lack of this line of code:
self.definesPresentationContext = YES;
Setting the presentation context to YES indicates that the view controller's view should be covered when the view controller presents the UISearchController.

Related

How to prevent the UISearchController from showing the navigation bar?

My use case is kind of strange. I'm using my own navigation bar, so I hide the default one with
[self.navigationController setNavigationBarHidden:YES animated:NO];
on viewWillAppear.
Everything works great, but if I have the keyboard open on an active search, and then I go back to a previous UIViewController, then the native navigation bar shows up again, and I end up with 2 navigation bars (my own and the default).
This is how I'm setting up my UISearchController in viewDidLoad:
- (void)viewDidLoad {
[super viewDidLoad];
self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
self.searchController.obscuresBackgroundDuringPresentation = NO;
self.searchController.searchBar.delegate = self;
[self.searchController.searchBar sizeToFit];
self.definesPresentationContext = YES;
self.searchController.hidesNavigationBarDuringPresentation = YES;
self.searchController.searchBar.searchBarStyle = UISearchBarStyleMinimal;
}
I already tried removing the self.definesPresentationContext = YES; (or turning it to NO), but that creates a different issue, which is that when I go back to the previous UIViewController the search bar stays on top of everything else! Until I tap on Cancel. I also tried calling the Cancel button programatically on viewWillDissappear, but that didn't work either...
So I'm running out of options, and that's why I'm here.
Any thoughts?
Using a navigation bar that is not the standard maybe it's not the best idea. (I know customers can sometimes be stubborn, but we should teach them that sometimes standard solutions have a lot of good points, like low maintenance for example, which turns in lower bills for them).
Having said that, as a last resort I may suggest you a quite "strong" approach.
You could subclass the UINavigationController with a custom class, and inside this class you could override the setNavigationBarHidden method like this
- (void)setNavigationBarHidden:(BOOL)hidden animated:(BOOL)animated{
[super setNavigationBarHidden:YES animated:NO];
}
method. This should make the bar hidden all the time.
Still, i'm not a big supported of this kind of solutions, but it may work in your case.

How do I make a navigation bar stay visible with UISearchController?

So I have a navigation controller hooked up to a view controller. That obviously provides the default navigation bar. Below that, I have another navigation bar with two buttons. In code I am manually adding the search bar that the UISearchController provides to that navigation bar. Below that, there is another filter view (custom), then a UITableView. Everything seems to work, but when I click search and start typing, the result view covers up the second navigation bar and the search bar, making it sort of useless. I tried playing around with self.searchController.hidesNavigationBarDuringPresentation = NO; but that just hides the main navigation bar. The even more infuriating part is the result view controller is actually leaving space for the second navigation bar, but it's just hidden behind this. It is even possible to see this in the debug view heirachy menu. Here’s the code I'm using for the search controller:
CUSearchResultsTableViewController *results = [self.storyboard instantiateViewControllerWithIdentifier:#"searchResults"];
self.searchController = [[UISearchController alloc] initWithSearchResultsController:results];
self.searchController.searchResultsUpdater = self;
self.searchBarNavItem.titleView = self.searchController.searchBar;
self.searchController.hidesNavigationBarDuringPresentation = NO;
self.searchController.obscuresBackgroundDuringPresentation = NO;
self.searchController.dimsBackgroundDuringPresentation = NO;
self.definesPresentationContext = YES;
self.searchController.delegate = self;
self.searchController.searchBar.delegate = self;
Here is how you can do it:
objective-c
[self.navigationItem setHidesSearchBarWhenScrolling:NO];
Swift
self.navigationItem.hidesSearchBarWhenScrolling = false;

Can't edit UISearchController UISearchBar in navigationItem titleView

When setting a UISearchController search bar in the navigationItem titleView, the search bar can't be edited.
In my viewDidLoad I am configuring a UISearchController.
self.searchViewController = [self.storyboard instantiateViewControllerWithIdentifier:NSStringFromClass([SearchViewController class])];
self.searchViewController.delegate = self;
self.searchController = [[UISearchController alloc] initWithSearchResultsController:self.searchViewController];
self.searchController.delegate = self;
self.searchController.searchResultsUpdater = self;
self.searchController.searchBar.delegate = self;
self.navigationItem.titleView = self.searchController.searchBar;
I can't tap the search bar. The cursor does not appear and there is no user interaction.
Oddly, if I initialize the UISearchController locally without setting it to a property, then I can edit the search bar, just no delegate callbacks.
self.searchViewController = [self.storyboard instantiateViewControllerWithIdentifier:NSStringFromClass([SearchViewController class])];
self.searchViewController.delegate = self;
UISearchController *searchController = [[UISearchController alloc] initWithSearchResultsController:self.searchViewController];
searchController.delegate = self;
searchController.searchResultsUpdater = self;
searchController.searchBar.delegate = self;
self.navigationItem.titleView = searchController.searchBar;
Another interesting behavior is that the clear button works (if some text is set in the search bar while initializing).
I had the same issue.
Imagine you have FirstViewController and SecondViewController, and booth have a UISearchBar on the titleView.
To fix the problem I had this code to booth UIViewController's.
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.definesPresentationContext = true
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
self.definesPresentationContext = false
}
I am setting self.definesPresentationContext = YES; in the view controller that presents the view controller in question.
This must be set to self.definesPresentationContext = NO; in viewWillAppear:.
Now the search bar in the presented view controller can be edited.
Set your search bar to navigation title view :
self.navigationItem.titleView = self.searchBarTop;
then just set this view either left/right button of Navigation Bar
UIBarButtonItem *searchBarItem = [[UIBarButtonItem alloc] initWithCustomView:searchBar];
self.navigationItem.rightBarButtonItem = searchBarItem;
I hope this will work for You!!
I have just solved a very similar problem in my app, and thought I'd share the solution in case the existing solutions don't fix it for you.
In my case I had a tab bar application, with my custom controllers in the tabs, embedded in the navigation controllers. The symptoms were exactly the same, the search bar showed in the title area of the navigation bar, but was not interactive.
I have discovered that the problem was that I used my custom subclass of the UITabBarController and I have overriden the viewWillAppear(animated:) method, but forgot to call super.viewWillAppear(animated:) in the implementation. The additional symptom was that when I switched the tabs, the search bar suddenly became interactive and everything worked fine, just the interaction on the initial tab was disabled.
I hope this helps someone.
In your first block of code, you're instantiating with a SearchViewController identifier. In the second, you're using HBSearchViewController. This suggests that there might be another difference in your code besides using / not using an outlet.

UISearchController changing status bar color on invocation

I have the following code in my app, specifically in viewDidLoad: that sets up my UISearchController.
self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
self.searchController.hidesNavigationBarDuringPresentation = NO;
self.searchController.dimsBackgroundDuringPresentation = NO;
self.definesPresentationContext = NO;
self.searchController.searchBar.scopeButtonTitles = #[];
self.searchController.searchBar.searchBarStyle = UISearchBarStyleProminent;
[_tableView setTableHeaderView:_searchController.searchBar];
Whenever the search bar (which is added to the tableView) is invoked, the UIStatusBar color changes from UIStatusBarStyleLightContent to dark (white to black). Now, I figured out if I set,
self.definesPresentationContext = NO;
to the following:
self.definesPresentationContext = YES;
the issue is solved and the UIStatusBar color is preserved. However, another issue arises. When self.definesPresentationContext is set to YES
, upon invocation the search bar shifts down for some reason, coincidently (or rightfully so) right under where the bottom of the UIRefreshControl displays on the tableView.
Setting View-controller based status bar appearance to No is not a solution if you want the view controllers to define how the status bar looks.
My solution consisted of two things:
Make sure the presenting view controller has definesPresentationContext set to YES
Make sure both the view controller that is pushed and the pushing view controller are laid out beneath the navigation bar (set extendedLayoutIncludesOpaqueBars to YES)
As of iOS 10 (maybe earlier?), if you have "View controller-based status bar appearance" set to YES in your Info.plist, simply set the preferredStatusBarStyle in the UIViewController that the UISearchController is included in.
- (UIStatusBarStyle)preferredStatusBarStyle {
return UIStatusBarStyleLightContent;
}
(you don't need to subclass or create a category/extension of UISearchController to override preferredStatusBarStyle... it uses the preferredStatusBarStyle that you set in your UIViewController)
I needed full control over my status bar colour. I use the extensions found here to ensure that the visible view controller is setting the preferred status bar colour.
For me it was therefore necessary to override UISearchController and override preferredStatusBarStyle and return the style I wanted.
If you ViewController is inside a TabBarController then -
Instead of
self.definesPresentationContext = YES;
Use self.tabBarController.definesPresentationContext = YES;
This worked for me in above scenario.
The status bar that is displayed when the search controller is presented (is active) belongs to the search controller. To set the preferred status bar style you must add a category to UISearchController and then override the preferredStatusBarStyle method.
Below is an example of the implementation file of the category:
#implementation UISearchController (Customization)
-(UIStatusBarStyle)preferredStatusBarStyle {
return UIStatusBarStyleLightContent;
}
#end
Or we can write an extension on Swift (version 2, but you can translate it to 3 easily):
extension UISearchController {
override public func preferredStatusBarStyle() -> UIStatusBarStyle{
if Theme.lightTheme() {
return UIStatusBarStyle.Default
}
else {
return UIStatusBarStyle.LightContent
}
}
}
Where Theme is a class that regulate app colour theme.

UISearchController in a UIViewController

I'm looking to create similar functionality to Apple's maps application in Swift. Is there anyway to integrate a UISearchController in to a regular view (i.e.: not a UITableView). Dropping one in through Storyboard results in a crash after clicking inside the connected searchbar. Or is there some way I can achieve this outcome with a UITableView?
If you want to use UISearchController with a non UITableView, here is how I did it.
Since the UISearchController is not (yet!) supported by IB, you do not need to add anything in it, like a UISearchBar.
#interface UIViewControllerSubclass () <UITableViewDelegate, UITableViewDataSource, UISearchBarDelegate, UISearchControllerDelegate, UISearchResultsUpdating>
#property (strong, nonatomic) UISearchController *searchController;
#end
#implementation UIViewControllerSubclass
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any custom init from here...
// Create a UITableViewController to present search results since the actual view controller is not a subclass of UITableViewController in this case
UITableViewController *searchResultsController = [[UITableViewController alloc] init];
// Init UISearchController with the search results controller
self.searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
// Link the search controller
self.searchController.searchResultsUpdater = self;
// This is obviously needed because the search bar will be contained in the navigation bar
self.searchController.hidesNavigationBarDuringPresentation = NO;
// Required (?) to set place a search bar in a navigation bar
self.searchController.searchBar.searchBarStyle = UISearchBarStyleMinimal;
// This is where you set the search bar in the navigation bar, instead of using table view's header ...
self.navigationItem.titleView = self.searchController.searchBar;
// To ensure search results controller is presented in the current view controller
self.definesPresentationContext = YES;
// Setting delegates and other stuff
searchResultsController.tableView.dataSource = self;
searchResultsController.tableView.delegate = self;
self.searchController.delegate = self;
self.searchController.dimsBackgroundDuringPresentation = NO;
self.searchController.searchBar.delegate = self;
}
#end
I hope it is enough to work :-)
Then of course you need at least to implement UITableViewDelegate, UITableViewDataSource, UISearchResultsUpdater methods.
Enjoy!
Trying to figure out UISearchController myself. Setting it to the titleView is convenient, but on one of my pages, I had to put the searchBar near the top of the UIViewController:
// Add a normal View into the Storyboard.
// Set constraints:
// - height: 44
// - leading and trailing so that it spans the width of the page
// - vertical position can be anywhere based on your requirements, like near the top
#IBOutlet weak var searchContainerView: UIView!
var searchResultsController = UISearchController()
override func viewDidLoad() {
// TODO: set the searchResultsController to something
let controller = UISearchController(searchResultsController: nil)
// have the search bar span the width of the screen
controller.searchBar.sizeToFit()
// add search bar to empty View
searchContainerView.addSubview(controller.searchBar)
searchResultsController = controller
}
UPDATE:
After implementing UISearchController in a project or two, I found myself gravitating toward #adauguet's approach of embedding the search bar into the Navigation Bar.
Here's the code in Swift. One difference though is that it doesn't set the searchBar delegate, since searchResultsUpdater already listens for text changes.
override func viewDidLoad() {
super.viewDidLoad()
// locationManager.delegate = self
// locationManager.desiredAccuracy = kCLLocationAccuracyBest
// locationManager.requestWhenInUseAuthorization()
// locationManager.requestLocation()
let locationSearchTable = storyboard!.instantiateViewControllerWithIdentifier("LocationSearchTable") as! LocationSearchTable
resultSearchController = UISearchController(searchResultsController: locationSearchTable)
resultSearchController?.searchResultsUpdater = locationSearchTable
let searchBar = resultSearchController!.searchBar
searchBar.sizeToFit()
searchBar.placeholder = "Search for places"
navigationItem.titleView = resultSearchController?.searchBar
resultSearchController?.hidesNavigationBarDuringPresentation = false
resultSearchController?.dimsBackgroundDuringPresentation = true
definesPresentationContext = true
}
Also, I wrote a blog post that creates a project from scratch that uses UISearchController to display map search results. It also does other things that you might want in a map project, like get the user location, drop pins, parse placemarks into a one-line address, and create callout buttons that take you to Apple Maps for driving directions.
http://www.thorntech.com/2016/01/how-to-search-for-location-using-apples-mapkit/
The blog post is quite long, so here's the associated git repo if you just want to skip to the code:
https://github.com/ThornTechPublic/MapKitTutorial
I added a Search Bar and Search Display Controller in my View Controller in the storyboard. The view controller contains only the search bar and search display controller and does not have it's own TableView. When you add the search bar in your view controller, it sets your view controller as it's delegate automatically.
Now the Search Bar and Search Display Controller has a table view of itself which it uses to display the search results when you click inside the box and start typing. This table view expects your view controller to provide the implementations of the numberOfRowsInSection and cellForRowAtIndexPath functions for it to display the data properly.
When you run your project without these and tap inside the search bar, you will get the following error:-
tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x7fbf63449660
*** Terminating app due to uncaught exception 'NSInvalidArgumentException'
If you see, the error is at the numberOfRowsInSection method.
Change your view controller definition from
class ViewController: UIViewController
to
class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource
and implement the required methods which are:-
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
return UITableViewCell()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 0
}
I have just added default return values in the above methods.
Now if you filter out your data source in your searchviewdelegate methods and set up your number of rows and cell info in the above two methods properly, it should work.
Hope this helps!
I had some trouble converting from SearchDisplayController in UIViewController to SearchController in ViewController because SearchController implementation isn't so intuitive. But you can just add in searcher from SearchController itself into any view. You cannot set constraint though because the search bar would move up when you focus/select it (if you know how to set the constraint to seachController.searchbar after adding it to any view, LET ME KNOW!). Below I am sharing a checklist that I found very important/valuable when implementing SearchController in ViewController.
//you can just add searcher to any view. It would automatically move up to show the tableView like magic. But for this reason, you cannot set constraint to the search bar to the placeholder view that you are adding it to.
[self.searchBarPlaceHolderView addSubview:self.searchController.searchBar];
//you need this to prevent search bar to drop down when you focus/select it. You would want to set this to NO if you are adding searchBar to the navigation bar's titleview.
self.searchController.hidesNavigationBarDuringPresentation = YES;
//make sure you set this in your viewController
self.extendedLayoutIncludesOpaqueBars = true;
self.definesPresentationContext = YES;
// you also need to give the search controller a tableViewController that can be displayed. You can also do just self.searchResultsController = [[UITableView alloc] init] for a generic one.
self.searchResultsController = (UITableViewController *)[ [UIStoryboard storyboardWithName:#"Main" bundle:nil] instantiateViewControllerWithIdentifier:#"searchResultsTableViewController"];
self.searchResultsController.tableView.dataSource = self;
self.searchResultsController.tableView.delegate = self;
self.searchResultsController.definesPresentationContext = NO;
self.searchController = [[UISearchController alloc] initWithSearchResultsController:self.searchResultsController];

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