AlertsViewController.m

/*
     File: AlertsViewController.m 
 Abstract: The view controller for hosting various kinds of alerts and action sheets 
  Version: 2.10 
  
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 */

#import "AlertsViewController.h"

static NSString *kSectionTitleKey = @"sectionTitleKey";
static NSString *kLabelKey = @"labelKey";
static NSString *kSourceKey = @"sourceKey";

enum AlertTableSections
{
	kUIAction_Simple_Section = 0,
	kUIAction_OKCancel_Section,
	kUIAction_Custom_Section,
	kUIAlert_Simple_Section,
	kUIAlert_OKCancel_Section,
	kUIAlert_Custom_Section,
    kUIAlert_SecureText_Section
};

@implementation AlertsViewController

@synthesize dataSourceArray;

- (void)dealloc
{	
	[dataSourceArray release];
	
	[super dealloc];
}

- (void)viewDidLoad
{
	[super viewDidLoad];
	
	self.title = NSLocalizedString(@"AlertTitle", @"");

	self.dataSourceArray = [NSMutableArray arrayWithObjects:
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UIActionSheet", kSectionTitleKey,
								 @"Show Simple", kLabelKey,
								 @"AlertsViewController.m - dialogSimpleAction", kSourceKey,
							 nil],
							
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UIActionSheet", kSectionTitleKey,
								 @"Show OK-Cancel", kLabelKey,
								 @"AlertsViewController.m - dialogOKCancelAction", kSourceKey,
							 nil],
							
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UIActionSheet", kSectionTitleKey,
								 @"Show Customized", kLabelKey,
								 @"AlertsViewController.m - dialogOtherAction", kSourceKey,
							 nil],
							
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UIAlertView", kSectionTitleKey,
								 @"Show Simple", kLabelKey,
								 @"AlertsViewController.m - alertSimpleAction", kSourceKey,
							 nil],
							
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UIAlertView", kSectionTitleKey,
								 @"Show OK-Cancel", kLabelKey,
								 @"AlertsViewController.m - alertOKCancelAction", kSourceKey,
							 nil],
							
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UIAlertView", kSectionTitleKey,
								 @"Show Custom", kLabelKey,
								 @"AlertsViewController.m - alertOtherAction", kSourceKey,
							 nil],
                            nil];
    
    // create a temporary alert to test it's feature availability
    UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:nil
                                                     message:nil
                                                    delegate:self
                                           cancelButtonTitle:nil
                                           otherButtonTitles: nil] autorelease];
    // only add this part to the table if secure alerts are available
    if ([alert respondsToSelector:@selector(alertViewStyle)])
    {
        [dataSourceArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:
                                        @"UIAlertView", kSectionTitleKey,
                                        @"Secure Text Input", kLabelKey,
                                        @"AlertsViewController.m - alertSecureTextAction", kSourceKey,
                                    nil]];
    }
}

// called after the view controller's view is released and set to nil.
// For example, a memory warning which causes the view to be purged. Not invoked as a result of -dealloc.
// So release any properties that are loaded in viewDidLoad or can be recreated lazily.
//
- (void)viewDidUnload 
{
	[super viewDidUnload];
	
	self.dataSourceArray = nil;	// this will release and set to nil
}


#pragma mark -
#pragma mark UIActionSheet

- (void)dialogSimpleAction
{
	// open a dialog with just an OK button
	UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"UIActionSheet <title>"
									delegate:self cancelButtonTitle:nil destructiveButtonTitle:@"OK" otherButtonTitles:nil];
	actionSheet.actionSheetStyle = UIActionSheetStyleDefault;
	[actionSheet showInView:self.view];	// show from our table view (pops up in the middle of the table)
	[actionSheet release];
}

- (void)dialogOKCancelAction
{
	// open a dialog with an OK and cancel button
	UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"UIActionSheet <title>"
									delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"OK" otherButtonTitles:nil];
	actionSheet.actionSheetStyle = UIActionSheetStyleDefault;
	[actionSheet showInView:self.view]; // show from our table view (pops up in the middle of the table)
	[actionSheet release];
}

- (void)dialogOtherAction
{
	// open a dialog with two custom buttons
	UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"UIActionSheet <title>"
									delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil
									otherButtonTitles:@"Button1", @"Button2", nil];
	actionSheet.actionSheetStyle = UIActionSheetStyleDefault;
	actionSheet.destructiveButtonIndex = 1;	// make the second button red (destructive)
	[actionSheet showInView:self.view]; // show from our table view (pops up in the middle of the table)
	[actionSheet release];
}


#pragma mark -
#pragma mark UIAlertView

- (void)alertSimpleAction
{
	// open an alert with just an OK button
	UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"UIAlertView" message:@"<Alert message>"
							delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
    alert.accessibilityLabel = @"Alert Simple";
	[alert show];	
	[alert release];
}

- (void)alertOKCancelAction
{
	// open a alert with an OK and cancel button
	UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"UIAlertView" message:@"<Alert message>"
							delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
    alert.accessibilityLabel = @"Alert OK-Cancel";
	[alert show];
	[alert release];
}

- (void)alertOtherAction
{
	// open an alert with two custom buttons
	UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"UIAlertView" message:@"<Alert message>"
							delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Button1", @"Button2", nil];
	[alert show];
	[alert release];
}

- (void)alertSecureTextAction
{
	// open an alert with two custom buttons
	UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"UIAlertView" message:@"Enter a password:"
                                                   delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
	alert.alertViewStyle = UIAlertViewStyleSecureTextInput;
    [alert show];
	[alert release];
}


#pragma mark -
#pragma mark - UIActionSheetDelegate

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
	// the user clicked one of the OK/Cancel buttons
	if (buttonIndex == 0)
	{
		//NSLog(@"ok");
	}
	else
	{
		//NSLog(@"cancel");
	}
}


#pragma mark -
#pragma mark - UIAlertViewDelegate

- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
	// use "buttonIndex" to decide your action
	//
}


#pragma mark -
#pragma mark - UITableView delegates

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
	return [self.dataSourceArray count];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
	return [[self.dataSourceArray objectAtIndex: section] valueForKey:kSectionTitleKey];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
	return 2;
}

// to determine specific row height for each cell, override this.
// In this example, each row is determined by its subviews that are embedded.
//
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
	return ([indexPath row] == 0) ? 50.0 : 22.0;
}

// the table's selection has changed, show the alert or action sheet
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
	// deselect the current row (don't keep the table selection persistent)
	[tableView deselectRowAtIndexPath:[tableView indexPathForSelectedRow] animated:YES];
	
	if (indexPath.row == 0)
	{
		switch (indexPath.section)
		{
			case kUIAction_Simple_Section:
			{
				[self dialogSimpleAction];
                break;
			}
				
			case kUIAction_OKCancel_Section:
			{
				[self dialogOKCancelAction];
				break;
			}
				
			case kUIAction_Custom_Section:
			{
				[self dialogOtherAction];
				break;
			}
				
			case kUIAlert_Simple_Section:
			{
				[self alertSimpleAction];
				break;
			}
				
			case kUIAlert_OKCancel_Section:
			{
				[self alertOKCancelAction];	
				break;
			}
				
			case kUIAlert_Custom_Section:
			{
				[self alertOtherAction];	
				break;
			}
                
            case kUIAlert_SecureText_Section:
			{
				[self alertSecureTextAction];	
				break;
			}
		}
	}
}

// to determine which UITableViewCell to be used on a given row.
//
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
	UITableViewCell *cell = nil;
	
	if ([indexPath row] == 0)
	{
		static NSString *kAlertCell_ID = @"AlertCell_ID";
		cell = [self.tableView dequeueReusableCellWithIdentifier:kAlertCell_ID];
		if (cell == nil)
		{
			cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kAlertCell_ID] autorelease];
		}
		
		cell.textLabel.text = [[self.dataSourceArray objectAtIndex: indexPath.section] valueForKey:kLabelKey];
        cell.accessibilityLabel = [NSString stringWithFormat:@"%@ %@", [[self.dataSourceArray objectAtIndex: indexPath.section] valueForKey:kSectionTitleKey],cell.textLabel.text];
	}	
	else
	{
		static NSString *kSourceCell_ID = @"SourceCell_ID";
		cell = [self.tableView dequeueReusableCellWithIdentifier:kSourceCell_ID];
		if (cell == nil)
		{
			cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kSourceCell_ID] autorelease];
			cell.selectionStyle = UITableViewCellSelectionStyleNone;
			
			cell.textLabel.opaque = NO;
            cell.textLabel.textAlignment = UITextAlignmentCenter;
            cell.textLabel.textColor = [UIColor grayColor];
			cell.textLabel.numberOfLines = 2;
            cell.textLabel.font = [UIFont systemFontOfSize:12];
		}
		
		cell.textLabel.text = [[self.dataSourceArray objectAtIndex: indexPath.section] valueForKey:kSourceKey];
	}
	
	return cell;
}

@end