Grabbing UISearchBar data - Objective C - ios

Question

I've created a UISearchBar in one of my ViewControllers that contain different containers that link to other ViewControllers. This UISearchBar is in the parent ViewController. I am trying to grab the text that was entered in the search bar to be used to send to another ViewController The UISearchBar was created in StoryBoard. I am using the following methods to try and receive information from the Search Bar:
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
NSLog(#"searching");
}
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
NSLog(#"Text change");
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
NSLog(#"Cancel clicked");
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
NSLog(#"Search Clicked");
}
Non of these functions above seem to run, I am not sure why. Suggestions or thoughts?
UPDATE:
Here is what I am using to initiate the Search Bar now:
_aSearchBar = [[UISearchBar alloc] initWithFrame:CGRectZero];
[_aSearchBar sizeToFit];
_aSearchBar.delegate = self;
_aSearchBar.placeholder = #"Search YouTube...";
_searchDC = [[UISearchDisplayController alloc] initWithSearchBar:_aSearchBar contentsController:self];
[self performSelector:#selector(setSearchDisplayController:) withObject:_searchDC];
_searchDC.delegate = self;
_searchDC.searchResultsDataSource = self;
_searchDC.searchResultsDelegate = self;
[_aSearchBar release];
NSLog(#"%#",[_searchDC.delegate class]); <------ this prints home which is the correct class
Now the only issue is, I can't see the search bar anymore?

Answer 1

If the delegate methods are not being called it means that the UISearchBar doesn't know where to delegate the optional methods in UISearchBarDelegate protocol.
So the ViewController that implements these methods
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
NSLog(#"searching");
}
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
NSLog(#"Text change");
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
NSLog(#"Cancel clicked");
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
NSLog(#"Search Clicked");
}
must be set as the delegate of the UISearchBar. To make sure that the correct ViewController is set as the delegate of the UISearchBar I would print the
[searchBar.delegate class]
If this returns nil or some other class name then the one you expect, you will know where the problems comes from.
Hope this helps.
UPDATE
Ok, I just created a Single View Application and dragged a UISearchBar on the storyboard. Then I added an outlet for the UISearchBar called searchBar. Then I made the ViewController implement the UISearchBarDelegate protocol. Then in ViewDidLoad I set the searchBar.delegate = self. After I added all the delegate methods listed above everything worked... So the only thing that I can think of now is that the ViewController is not implementing the protocol
#interface ViewController () <UISearchBarDelegate>
Here's the ViewController source code:
#import "ViewController.h"
#interface ViewController () <UISearchBarDelegate>
#property (weak, nonatomic) IBOutlet UISearchBar *searchBar;
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.searchBar.delegate = self;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - UISearchBarDelegate
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
NSLog(#"searching");
}
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
NSLog(#"Text change");
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
NSLog(#"Cancel clicked");
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
NSLog(#"Search Clicked");
}