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Sep 6, 2011

Search In Table View




#import <UIKit/UIKit.h>

#define COOKBOOK_PURPLE_COLOR    [UIColor colorWithRed:0.20392f green:0.19607f blue:0.61176f alpha:1.0f]

#define CRAYON_NAME(CRAYON)           [[CRAYON componentsSeparatedByString:@"#"] objectAtIndex:0]
#define CRAYON_COLOR(CRAYON) [self getColor:[[CRAYON componentsSeparatedByString:@"#"] lastObject]]

#define DEFAULTKEYS [self.crayonColors.allKeys sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)]
#define FILTEREDKEYS [self.filteredArray sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)]

@interface TableListViewController : UITableViewController
{
         NSMutableDictionary *crayonColors;
         NSArray *filteredArray;
         UISearchBar *searchBar;
         UISearchDisplayController *searchDC;
}
@property (retain) NSMutableDictionary *crayonColors;
@property (retain) NSArray *filteredArray;
@property (retain) UISearchBar *searchBar;
@property (retain) UISearchDisplayController *searchDC;
@end

@implementation TableListViewController
@synthesize crayonColors;
@synthesize filteredArray;
@synthesize searchBar;
@synthesize searchDC;

- (NSInteger)numberOfSectionsInTableView:(UITableView *)aTableView
{
         return 1;
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
         [self.searchBar setText:@""];
}

- (NSInteger)tableView:(UITableView *)aTableView numberOfRowsInSection:(NSInteger)section
{
         // Normal table
         if (aTableView == self.tableView) return self.crayonColors.allKeys.count;
        
         // Search table
         NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF contains[cd] %@", self.searchBar.text];
         self.filteredArray = [self.crayonColors.allKeys filteredArrayUsingPredicate:predicate];
         return self.filteredArray.count;
}

// Convert a 6-character hex color to a UIColor object
- (UIColor *) getColor: (NSString *) hexColor
{
         unsigned int red, green, blue;
         NSRange range;
         range.length = 2;
        
         range.location = 0;
         [[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&red];
         range.location = 2;
         [[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&green];
         range.location = 4;
         [[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&blue];
        
         return [UIColor colorWithRed:(float)(red/255.0f) green:(float)(green/255.0f) blue:(float)(blue/255.0f) alpha:1.0f];
}

- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
         // Dequeue or create a cell
         UITableViewCellStyle style =  UITableViewCellStyleDefault;
         UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:@"BaseCell"];
         if (!cell) cell = [[[UITableViewCell alloc] initWithStyle:style reuseIdentifier:@"BaseCell"] autorelease];
        
         // Retrieve the crayon and its color
         NSArray *keyCollection = (aTableView == self.tableView) ? DEFAULTKEYS : FILTEREDKEYS;
         NSString *crayon = [keyCollection objectAtIndex:indexPath.row];
         cell.textLabel.text = crayon;
         if (![crayon hasPrefix:@"White"])
            cell.textLabel.textColor = [self.crayonColors objectForKey:crayon];
         else
            cell.textLabel.textColor = [UIColor blackColor];
         return cell;
}

// Respond to user selections by updating tint colors
- (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
         NSArray *keyCollection = (aTableView == self.tableView) ? DEFAULTKEYS : FILTEREDKEYS;
         NSString *crayon = [keyCollection objectAtIndex:indexPath.row];
         self.navigationController.navigationBar.tintColor = [self.crayonColors objectForKey:crayon];
         self.searchBar.tintColor = [self.crayonColors objectForKey:crayon];
}

- (void) viewDidLoad
{
         // Prepare the crayon color dictionary
         NSString *pathname = [[NSBundle mainBundle]  pathForResource:@"crayons" ofType:@"txt" inDirectory:@"/"];
         NSArray *rawCrayons = [[NSString stringWithContentsOfFile:pathname encoding:NSUTF8StringEncoding error:nil] componentsSeparatedByString:@"\n"];
         self.crayonColors = [NSMutableDictionary dictionary];
         for (NSString *string in rawCrayons)
            [self.crayonColors setObject:CRAYON_COLOR(string) forKey:CRAYON_NAME(string)];
        
         // Create a search bar
         self.searchBar = [[[UISearchBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 44.0f)] autorelease];
         self.searchBar.tintColor = COOKBOOK_PURPLE_COLOR;
         self.searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
         self.searchBar.autocapitalizationType = UITextAutocapitalizationTypeNone;
         self.searchBar.keyboardType = UIKeyboardTypeAlphabet;
         self.tableView.tableHeaderView = self.searchBar;
        
         // Create the search display controller
         self.searchDC = [[[UISearchDisplayController alloc] initWithSearchBar:self.searchBar contentsController:self] autorelease];
         self.searchDC.searchResultsDataSource = self;
         self.searchDC.searchResultsDelegate = self;
}
@end

@interface TestBedAppDelegate : NSObject <UIApplicationDelegate>
@end

@implementation TestBedAppDelegate
- (void)applicationDidFinishLaunching:(UIApplication *)application
{       
        
         TableListViewController *tlvc = [[TableListViewController alloc] init];
         UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:tlvc];
         nav.navigationBar.tintColor = COOKBOOK_PURPLE_COLOR;
        
         UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
         [window addSubview:nav.view];
         [window makeKeyAndVisible];
}
@end

int main(int argc, char *argv[])
{
         NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
         int retVal = UIApplicationMain(argc, argv, nil, @"TestBedAppDelegate");
         [pool release];
         return retVal;
}

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