在UIViewController中添加搜索显示控制器

Question

我想在UIViewController中实现UISearchDisplayController，因此没有实现UITableView。我创建了UISearchBar和UISearchDisplayController并实现了相应的委托方法。

当我运行该应用程序并尝试搜索时，不应显示应与搜索结果一起显示的表视图。为了解释更多我的应用UI，UIViewController有一张地图，搜索栏放置在导航控制器中。

我现在所理解的，似乎我应该实现一个表视图，以便重新用于搜索结果。但是，没有地方/需要放置表格视图。我能做些什么来解决这个问题？任何提示？

这里是我是如何实现的一切代码：

- (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