alertsviewcontroller.m

GLPaint example code from the iphone SDK

/*

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

Version: 1.7

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*/

#import "AlertsViewController.h"
#import "SourceCell.h"
#import "Constants.h"

@implementation AlertsViewController

NSString *kAlertCell_ID = @"AlertCell_ID";

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

@synthesize myTableView;

- (id)init
{
	self = [super init];
	if (self)
	{
		// this title will appear in the navigation bar
		self.title = NSLocalizedString(@"AlertTitle", @"");
	}
	return self;
}

- (void)loadView
{
	// create and configure the table view
	myTableView = [[UITableView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame] style:UITableViewStyleGrouped];	
	myTableView.delegate = self;
	myTableView.dataSource = self;
	myTableView.autoresizesSubviews = YES;
	
	self.view = myTableView;
}

#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 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 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 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];
}


#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");
	}
	
	[myTableView deselectRowAtIndexPath:[myTableView indexPathForSelectedRow] animated:NO];
}

#pragma mark - UIAlertViewDelegate

- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
	// use "buttonIndex" to decide your action
	//
	
	[myTableView deselectRowAtIndexPath:[myTableView indexPathForSelectedRow] animated:NO];
}

#pragma mark - UITableView delegates

// if you want the entire table to just be re-orderable then just return UITableViewCellEditingStyleNone
//
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
	return UITableViewCellEditingStyleNone;
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
	return 6;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
	NSString *title;
	switch (section)
	{
		case kUIAction_Simple_Section:
		{
			title = @"UIActionSheet";
			break;
		}
		case kUIAction_OKCancel_Section:
		{
			title = @"UIActionSheet";
			break;
		}
		case kUIAction_Custom_Section:
		{
			title = @"UIActionSheet";
			break;
		}
		case kUIAlert_Simple_Section:
		{
			title = @"UIAlertView";
			break;
		}
		case kUIAlert_OKCancel_Section:
		{
			title = @"UIAlertView";
			break;
		}
		case kUIAlert_Custom_Section:
		{
			title = @"UIAlertView";
			break;
		}

	}
	return title;
}

- (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
// buy the its subviews that are embedded.
//
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
	CGFloat result;
	
	switch ([indexPath row])
	{
		case 0:
		{
			result = kUIRowHeight;
			break;
		}
		case 1:
		{
			result = kUIRowLabelHeight;
			break;
		}
	}

	return result;
}

// utility routine leveraged by 'cellForRowAtIndexPath' to determine which UITableViewCell to be used on a given row.
//
- (UITableViewCell *)obtainTableCellForRow:(NSInteger)row
{
	UITableViewCell *cell = nil;
	
	if (row == 0)
		cell = [myTableView dequeueReusableCellWithIdentifier:kAlertCell_ID];
	else if (row == 1)
		cell = [myTableView dequeueReusableCellWithIdentifier:kSourceCell_ID];

	if (cell == nil)
	{
		if (row == 0)
		{
			cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:kAlertCell_ID] autorelease];
		}
		else if (row == 1)
		{
			cell = [[[SourceCell alloc] initWithFrame:CGRectZero reuseIdentifier:kSourceCell_ID] autorelease];
			cell.selectionStyle = UITableViewCellSelectionStyleNone;
		}
	}
	
	return cell;
}

// the table's selection has changed, show the alert or action sheet
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
	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;
			}
		}
	}
}

// to determine which UITableViewCell to be used on a given row.
//
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
	NSInteger row = [indexPath row];
	UITableViewCell *cell = [self obtainTableCellForRow:row];
	
	switch (indexPath.section)
	{
		case kUIAction_Simple_Section:
		{
			if (row == 0)
			{
				cell.text = @"Show Simple";
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"AlertsViewController.m - dialogSimpleAction";
			}
			break;
		}
		
		case kUIAction_OKCancel_Section:
		{
			if (row == 0)
			{
				cell.text = @"Show OK-Cancel";
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"AlertsViewController.m - dialogOKCancelAction";
			}
			break;
		}
		
		case kUIAction_Custom_Section:
		{
			if (row == 0)
			{
				cell.text = @"Show Customized";
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"AlertsViewController.m - dialogOtherAction";
			}
			break;
		}
		
		case kUIAlert_Simple_Section:
		{
			if (row == 0)
			{
				cell.text = @"Show Simple";
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"AlertsViewController.m - alertSimpleAction";
			}
			break;
		}
		
		case kUIAlert_OKCancel_Section:
		{
			if (row == 0)
			{
				cell.text = @"Show OK-Cancel";
			}						
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"AlertsViewController.m - alertOKCancelAction";
			}
			break;
		}
		
		case kUIAlert_Custom_Section:
		{
			if (row == 0)
			{
				cell.text = @"Show Custom";
			}						
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"AlertsViewController.m - alertOtherAction";
			}
			break;
		}
	}
	
	return cell;
}

@end