Classes/SamplesController.m

 
/*
     File: SamplesController.m
 Abstract: A table view controller to manage and display a list file names of sample layouts to draw.
 The view controller manages one array:
 * samplesForDisplay is the array that corresponds to the full set samples the app can show.
 
 The table view displays the contents of the samplesForDisplay array.
 
 The view controller has a delegate that it notifies if row in the table view is selected.
 
  Version: 1.1
 
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*/
 
#import "SamplesController.h"
 
@implementation SamplesController
 
@synthesize delegate, samplesForDisplay, selectedSample;
 
// Utility helper method to extract list of sample document filenames from bundle
// used to present list of samples for user selection in UI.
- (NSArray*)copySamplesInBundle {
    
    NSMutableArray* result = [[NSMutableArray alloc] init];
    NSArray* filesInBundle = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:[[NSBundle mainBundle] bundlePath] error:NULL];  
    for (NSString* fileName in filesInBundle) {
        if ([fileName hasSuffix:@".xml"]) {
            // remove file extension for UI
            [result addObject:[fileName stringByDeletingPathExtension]];
        }
    }
    return result;
}
 
#pragma mark -
#pragma mark View lifecycle
 
- (void)viewDidLoad {
    [super viewDidLoad];
 
    self.title = @"Samples";
    self.contentSizeForViewInPopover = CGSizeMake(300.0, 280.0);
 
    // Get list of samples to show in UI 
    samplesForDisplay = [self copySamplesInBundle]; 
    // Initially, there is no active sample (RootViewController will specify this)
    selectedSample = @"";
}
 
- (BOOL)shouldAutorotate {
    return YES;
}
 
#pragma mark -
#pragma mark Table view methods
 
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [samplesForDisplay count];
}
 
 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    static NSString *CellIdentifier = @"Cell";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }
    
    // Set the tableview cell text to the name of the sample at the given index
    NSString *cellSampleName = [samplesForDisplay objectAtIndex:indexPath.row];
    cell.textLabel.text = cellSampleName; 
    if ([selectedSample isEqual:cellSampleName]) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    } else {
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
    return cell;
}
 
 
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    NSString *cellSampleName = [samplesForDisplay objectAtIndex:indexPath.row];
    // Notify the delegate if a row is selected (adding back file extension for delegate)
    if (delegate && [delegate respondsToSelector:@selector(samplesController:didSelectString:)]) {
        [delegate samplesController:self didSelectString:[cellSampleName stringByAppendingPathExtension:@"xml"]];
    }
    self.selectedSample = cellSampleName;
    [self.tableView reloadData]; // refresh tableView cells for selection state change
}
 
#pragma mark -
#pragma mark Memory management
 
- (void)dealloc {
    [samplesForDisplay release];
    [super dealloc];
}
 
 
@end