Adding Search Display Controller in UIViewController - ios

Question

I want to implement a UISearchDisplayController in a UIViewController, hence there is no UITableView implemented. I created the UISearchBar and UISearchDisplayController and implemented the corresponding delegate methods.
When I run the app and try searching, the table view that should be shown with the search results do not appear. To explain more my app UI, the UIViewController has a map and the search bar is placed in the navigation controller.
What I understood for now, it seems like I should implement a table view in order to be reused for the search results. However, there is no place/need to place a table view. What can I do to fix this? Any hints?
Here is the code how I implemented everything:
- (void)viewDidLoad{
[super viewDidLoad];
// Do any additional setup after loading the view.
_search = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 100, 30)];
[_search setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
[_search setPlaceholder:#"Search"];
self.navigationItem.titleView = _search;
_searchArray = [[NSMutableArray alloc] initWithObjects:#"Hi", nil];
_searchDisplay = [[UISearchDisplayController alloc] initWithSearchBar:_search contentsController:self];
_searchDisplay.delegate = self;
_searchDisplay.searchResultsDataSource = self;
_searchDisplay.searchResultsDelegate = self;
[_searchDisplay setActive:YES animated:YES];
filteredResults = [[NSMutableArray alloc] init];}
-(void) filterForSearchText:(NSString *) text scope:(NSString *) scope
{
[filteredResults removeAllObjects]; // clearing filter array
NSPredicate *filterPredicate = [NSPredicate predicateWithFormat:#"SELF contains[c] %#",text]; // Creating filter condition
filteredResults = [NSMutableArray arrayWithArray:[_searchArray filteredArrayUsingPredicate:filterPredicate]]; // filtering result
NSLog(#"search %#", filteredResults);
}
#pragma mark - UISearchDisplayDelegate Methods
-(BOOL) searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterForSearchText:searchString scope:[[[[self searchDisplayController] searchBar] scopeButtonTitles] objectAtIndex:[[[self searchDisplayController] searchBar] selectedScopeButtonIndex] ]];
return YES;
}
-(BOOL) searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption
{
[self filterForSearchText:self.searchDisplayController.searchBar.text scope:
[[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:searchOption]];
return YES;
}

Answer 1

#import <UIKit/UIKit.h>
#import "RoleDetailTVC.h" // so this class can be an RoleDetailTVCDelegate
#import "CoreDataTableViewController.h" // so we can fetch
#import "Role.h"
#interface RolesTVC : CoreDataTableViewController <RoleDetailTVCDelegate>
#property (strong, nonatomic) NSFetchedResultsController *fetchedResultsController;
#property (strong, nonatomic) NSManagedObjectContext *managedObjectContext;
#property (strong, nonatomic) Role *selectedRole;
#property (nonatomic, retain) NSMutableArray *searchResults;
#end
#import "RolesTVC.h"
#import "Role.h"
#import "ModelCell.h"
#import <QuartzCore/QuartzCore.h>
#interface RolesTVC ()
{
NSMutableArray *objects;
}
#end
#implementation RolesTVC
#synthesize fetchedResultsController = __fetchedResultsController;
#synthesize managedObjectContext = __managedObjectContext;
#synthesize selectedRole;
#synthesize searchResults;
-(id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
objects = [[NSMutableArray alloc]init];
if(self){
for (int i=1; i<100; i++) {
NSString *str = [NSString stringWithFormat:#"This is the fabulous Row %d",i];
[objects addObject:str];
}
}
return self;
}
//This function is where all the magic happens
-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
//1. Setup the CATransform3D structure
CATransform3D rotation;
rotation = CATransform3DMakeRotation( (90.0*M_PI)/180, 0.0, 0.7, 0.4);
rotation.m34 = 1.0/ -600;
//2. Define the initial state (Before the animation)
cell.layer.shadowColor = [[UIColor blackColor]CGColor];
cell.layer.shadowOffset = CGSizeMake(10, 10);
cell.alpha = 0;
cell.layer.transform = rotation;
cell.layer.anchorPoint = CGPointMake(0, 0.5);
//!!!FIX for issue #1 Cell position wrong------------
if(cell.layer.position.x != 0){
cell.layer.position = CGPointMake(0, cell.layer.position.y);
}
//4. Define the final state (After the animation) and commit the animation
[UIView beginAnimations:#"rotation" context:NULL];
[UIView setAnimationDuration:0.8];
cell.layer.transform = CATransform3DIdentity;
cell.alpha = 1;
cell.layer.shadowOffset = CGSizeMake(0, 0);
[UIView commitAnimations];
}
//Helper function to get a random float
- (float)randomFloatBetween:(float)smallNumber and:(float)bigNumber {
float diff = bigNumber - smallNumber;
return (((float) (arc4random() % ((unsigned)RAND_MAX + 1)) / RAND_MAX) * diff) + smallNumber;
}
- (UIColor*)colorFromIndex:(int)index{
UIColor *color;
//Purple
if(index % 3 == 0){
color = [UIColor colorWithRed:0.93 green:0.01 blue:0.55 alpha:1.0];
//Blue
}else if(index % 3 == 1){
color = [UIColor colorWithRed:0.00 green:0.68 blue:0.94 alpha:1.0];
//Blk
}else if(index % 3 == 2){
color = [UIColor blackColor];
}
else if(index % 3 == 3){
color = [UIColor colorWithRed:0.00 green:1.0 blue:0.00 alpha:1.0];
}
return color;
}
#pragma mark -
#pragma mark Fetched Results Controller section
- (void)setupFetchedResultsController
{
// 1 - Decide what Entity you want
NSString *entityName = #"Role"; // Put your entity name here
//NSLog(#"Setting up a Fetched Results Controller for the Entity named %#", entityName);
// 2 - Request that Entity
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:entityName];
[request setFetchLimit:100];
// 3 - Filter it if you want
//request.predicate = [NSPredicate predicateWithFormat:#"Role.name = Blah"];
// 4 - Sort it if you want
request.sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:#"name"
ascending:YES
selector:#selector(localizedCaseInsensitiveCompare:)]];
// 5 - Fetch it
self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request
managedObjectContext:self.managedObjectContext
sectionNameKeyPath:nil
cacheName:nil];
[self performFetch];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self setupFetchedResultsController];
}
/**
* iCloud
*
* #param note Check PersonTVC
*/
- (void)reloadFetchedResults:(NSNotification*)note {
//NSLog(#"Underlying data changed ... refreshing!");
[self performFetch];
}
- (void)viewDidLoad
{
[ADVThemeManager customizeTableView:self.tableView];
[self.tableView reloadData];
/*
* Refresh this view whenever data changes iCloud
*/
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(reloadFetchedResults:)
name:#"RolesTVCSomethingChanged"
object:[[UIApplication sharedApplication] delegate]];
}
- (void)viewDidUnload
{
/**
* iCloud
*
*/
[[NSNotificationCenter defaultCenter] removeObserver:self];
/**
* Search Function
*/
self.searchResults = nil;
}
#pragma mark -
#pragma mark - Table view delegate
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"RolesCell";
ModelCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"ModelCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
// Configure the cell...
Role *role = [self.fetchedResultsController objectAtIndexPath:indexPath];
cell.nameLbl.text = role.name;
cell.zoneLbl.text = role.zones;
cell.checkoutLbl.text = role.checkout;
//Set the accessory type.
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
//Configure the cell font
cell.zoneLbl.font = [UIFont fontWithName:#"eurostile-oblique" size:18.0];
cell.nameLbl.font = [UIFont fontWithName:#"eurostile-oblique" size:18.0];
cell.checkoutLbl.font = [UIFont fontWithName:#"eurostile-oblique" size:18.0];
return cell;
}
#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.searchDisplayController.searchResultsTableView)
{
return [self.searchResults count];
}
else
{
return [[[self.fetchedResultsController sections] objectAtIndex:section] numberOfObjects];
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 75.f;
}
#pragma mark -
#pragma mark Table view Methods
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[self.tableView beginUpdates]; // Avoid NSInternalInconsistencyException
// Delete the role object that was swiped
Role *roleToDelete = [self.fetchedResultsController objectAtIndexPath:indexPath];
//NSLog(#"Deleting (%#)", roleToDelete.name);
[self.managedObjectContext deleteObject:roleToDelete];
[self.managedObjectContext save:nil];
// Delete the (now empty) row on the table
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[self performFetch];
[self.tableView endUpdates];
NSError *error = nil;
if (![[self fetchedResultsController] performFetch:&error]) {
NSLog(#"Error! %#",error);
abort();
}
}
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"Add Role Segue"])
{
// NSLog(#"Setting RolesTVC as a delegate of RoleDetailTVC");
RoleDetailTVC *roleDetailTVC = segue.destinationViewController;
roleDetailTVC.delegate = self;
// NSLog(#"Creating a new role and passing it to RoleDetailTVC");
Role *newRole = [NSEntityDescription insertNewObjectForEntityForName:#"Role"
inManagedObjectContext:self.managedObjectContext];
roleDetailTVC.role = newRole;
// Hide bottom tab bar in the detail view
roleDetailTVC.hidesBottomBarWhenPushed = YES;
}
else if ([segue.identifier isEqualToString:#"Role Detail Segue"])
{
// NSLog(#"Setting RolesTVC as a delegate of RoleDetailTVC");
RoleDetailTVC *roleDetailTVC = segue.destinationViewController;
roleDetailTVC.delegate = self;
// Store selected Role in selectedRole property
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
self.selectedRole = [self.fetchedResultsController objectAtIndexPath:indexPath];
// NSLog(#"Passing selected role (%#) to RoleDetailTVC", self.selectedRole.name);
roleDetailTVC.role = self.selectedRole;
// Hide bottom tab bar in the detail view
roleDetailTVC.hidesBottomBarWhenPushed = YES;
}
else {
// NSLog(#"Unidentified Segue Attempted!");
}
}
- (void)theSaveButtonOnTheRoleDetailTVCWasTapped:(RoleDetailTVC *)controller
{
// do something here like refreshing the table or whatever
// close the delegated view
[controller.navigationController popViewControllerAnimated:YES];
}
// Override to support conditional rearranging of the table view.
-(BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath: (NSIndexPath *) indexPath {
return YES;
}
-(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath: (NSIndexPath *) indexPath {
return YES;
}
- (void)didReceiveMemoryWarning
{
UIAlertView *alertDialog;
alertDialog = [[UIAlertView alloc]
initWithTitle:NSLocalizedString(#"Memory Problem", #"Hafıza Problemi")
message: NSLocalizedString(#"Please Close Some Applications!", #"Hafıza Problemi")
delegate: nil
cancelButtonTitle: #"Ok"
otherButtonTitles: nil];
[alertDialog show];
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#end