/*File: PickerViewController.mAbstract: The view controller for hosting the UIPickerView of this sample.Version: 1.7Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Inc.("Apple") in consideration of your agreement to the following terms, and youruse, installation, modification or redistribution of this Apple softwareconstitutes acceptance of these terms.  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All Rights Reserved.*/#import "PickerViewController.h"#import "CustomPicker.h"#import "Constants.h"@implementation PickerViewController- (id)init{	self = [super init];	if (self)	{		// this title will appear in the navigation bar		self.title = NSLocalizedString(@"PickerTitle", @"");	}		return self;}// return the picker frame based on its size, positioned at the bottom of the page- (CGRect)pickerFrameWithSize:(CGSize)size{	CGRect screenRect = [[UIScreen mainScreen] applicationFrame];	CGRect pickerRect = CGRectMake(	0.0,									screenRect.size.height - kToolbarHeight - 44.0 - size.height,									size.width,									size.height);	return pickerRect;}#pragma mark #pragma mark UIPickerView#pragma mark- (void)createPicker{	pickerViewArray = [[NSArray arrayWithObjects:							@"John Appleseed", @"Chris Armstrong", @"Serena Auroux",							@"Susan Bean", @"Luis Becerra", @"Kate Bell", @"Alain Briere",							nil] retain];	// note we are using CGRectZero for the dimensions of our picker view,	// this is because picker views have a built in optimum size,	// you just need to set the correct origin in your view.	//	// position the picker at the bottom	myPickerView = [[UIPickerView alloc] initWithFrame:CGRectZero];	CGSize pickerSize = [myPickerView sizeThatFits:CGSizeZero];	myPickerView.frame = [self pickerFrameWithSize:pickerSize];	myPickerView.autoresizingMask = UIViewAutoresizingFlexibleWidth;	myPickerView.delegate = self;	myPickerView.showsSelectionIndicator = YES;	// note this is default to NO		// add this picker to our view controller, initially hidden	myPickerView.hidden = YES;	[self.view addSubview:myPickerView];}#pragma mark #pragma mark UIPickerView - Date/Time#pragma mark- (void)createDatePicker{	datePickerView = [[UIDatePicker alloc] initWithFrame:CGRectZero];	datePickerView.autoresizingMask = UIViewAutoresizingFlexibleWidth;	datePickerView.datePickerMode = UIDatePickerModeTime;		// note we are using CGRectZero for the dimensions of our picker view,	// this is because picker views have a built in optimum size,	// you just need to set the correct origin in your view.	//	// position the picker at the bottom	CGSize pickerSize = [myPickerView sizeThatFits:CGSizeZero];	datePickerView.frame = [self pickerFrameWithSize:pickerSize];		// add this picker to our view controller, initially hidden	datePickerView.hidden = YES;	[self.view addSubview:datePickerView];}#pragma mark #pragma mark UIPickerView - Custom Picker#pragma mark- (void)createCustomPicker{	customPickerView = [[CustomPicker alloc] initWithFrame:CGRectZero];	customPickerView.autoresizingMask = UIViewAutoresizingFlexibleWidth;		// note we are using CGRectZero for the dimensions of our picker view,	// this is because picker views have a built in optimum size,	// you just need to set the correct origin in your view.	//	// position the picker at the bottom	CGSize pickerSize = [myPickerView sizeThatFits:CGSizeZero];	customPickerView.frame = [self pickerFrameWithSize:pickerSize];		customPickerView.showsSelectionIndicator = YES;		// add this picker to our view controller, initially hidden	customPickerView.hidden = YES;	[self.view addSubview:customPickerView];}- (void)showPicker:(UIView *)picker{	// hide the current picker and show the new one	if (currentPicker)	{		currentPicker.hidden = YES;		label.text = @"";	}	picker.hidden = NO;		currentPicker = picker;	// remember the current picker so we can remove it later when another one is chosen}- (void)createButtonBar{	// create the button bar	buttonBar = [UIToolbar new];	buttonBar.barStyle = UIBarStyleBlackOpaque;		// position the button bar's frame	CGFloat toolbarHeight = kToolbarHeight + 4.0;	CGRect mainViewBounds = self.view.bounds;	[buttonBar setFrame:CGRectMake(CGRectGetMinX(mainViewBounds),								   CGRectGetMinY(mainViewBounds) + CGRectGetHeight(mainViewBounds) - (toolbarHeight * 2.0),								   CGRectGetWidth(mainViewBounds),								   toolbarHeight)];		// add a segmented control to the button bar	buttonBarSegmentedControl = [[UISegmentedControl alloc] initWithItems:									[NSArray arrayWithObjects:@"UIPicker", @"UIDatePicker", @"Custom", nil]];	[buttonBarSegmentedControl addTarget:self action:@selector(togglePickers:) forControlEvents:UIControlEventValueChanged];	buttonBarSegmentedControl.selectedSegmentIndex = 0.0;	// start by showing the normal picker	buttonBarSegmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;    buttonBarSegmentedControl.tintColor = [UIColor darkGrayColor];	buttonBarSegmentedControl.backgroundColor = [UIColor clearColor];	UIBarButtonItem *segItem = [[UIBarButtonItem alloc] initWithCustomView:buttonBarSegmentedControl];		buttonBar.items = [NSArray arrayWithObject:segItem];	[segItem release];		[self.view addSubview:buttonBar];		CGRect buttonBarFrame = [buttonBar frame];	CGRect segmentedControlFrame = CGRectMake(kLeftMargin,											  kTopMargin,											  buttonBarFrame.size.width - kLeftMargin,											  30.0);    buttonBarSegmentedControl.frame = segmentedControlFrame;		// start by showing the normal picker	buttonBarSegmentedControl.selectedSegmentIndex = 0.0;}	- (void)loadView{			CGRect screenRect = [[UIScreen mainScreen] applicationFrame];		// setup our parent content view and embed it to your view controller	UIView *contentView = [[UIView alloc] initWithFrame:screenRect];	contentView.backgroundColor = [UIColor blackColor];	contentView.autoresizesSubviews = YES;	contentView.autoresizingMask = UIViewAutoresizingFlexibleWidth;		self.view = contentView;	[contentView release];		[self createPicker];		[self createDatePicker];	[self createCustomPicker];		[self createButtonBar];		// label for picker selection output, place it right above the picker	CGRect labelFrame = CGRectMake(	kLeftMargin,									myPickerView.frame.origin.y - kTextFieldHeight,									self.view.bounds.size.width - (kRightMargin * 2.0),									kTextFieldHeight);	label = [[UILabel alloc] initWithFrame:labelFrame];    label.font = [UIFont systemFontOfSize: 14];	label.textAlignment = UITextAlignmentCenter;	label.textColor = [UIColor whiteColor];	label.backgroundColor = [UIColor clearColor];	[self.view addSubview:label];		// create the segmented control to control the UIDatePicker's style (date/time/datetime)	pickerStyleSegmentedControl = [[UISegmentedControl alloc] initWithItems:										[NSArray arrayWithObjects:@"1", @"2", @"3", @"4", nil]];	[pickerStyleSegmentedControl addTarget:self action:@selector(togglePickerStyle:) forControlEvents:UIControlEventValueChanged];	pickerStyleSegmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;	pickerStyleSegmentedControl.tintColor = [UIColor darkGrayColor];    pickerStyleSegmentedControl.backgroundColor = [UIColor clearColor];	[pickerStyleSegmentedControl sizeToFit];	pickerStyleSegmentedControl.hidden = YES;		CGRect segmentedControlFrame = CGRectMake(kRightMargin,											  kTopMargin + kTextFieldHeight + 5,											  screenRect.size.width - (kRightMargin * 2.0),											  kSegmentedControlHeight);    pickerStyleSegmentedControl.frame = segmentedControlFrame;	[self.view addSubview:pickerStyleSegmentedControl];		// create the selection label for our UIDatePicker segmented control	labelFrame = CGRectMake(0,							kTopMargin,							self.view.bounds.size.width,							kTextFieldHeight);	segmentLabel = [[UILabel alloc] initWithFrame:labelFrame];    segmentLabel.font = [UIFont systemFontOfSize: 14];	segmentLabel.textAlignment = UITextAlignmentCenter;	segmentLabel.textColor = [UIColor whiteColor];	segmentLabel.backgroundColor = [UIColor clearColor];	segmentLabel.hidden = YES;	[self.view addSubview:segmentLabel];		// start by showing the normal picker	buttonBarSegmentedControl.selectedSegmentIndex = 0.0;}- (void)dealloc{	[pickerViewArray release];	[myPickerView release];	[datePickerView release];	[label release];	[customPickerView release];		[pickerStyleSegmentedControl release];	[segmentLabel release];		[buttonBarSegmentedControl release];	[buttonBar release];		[super dealloc];}- (void)togglePickerStyle:(id)sender{	UISegmentedControl *segControl = sender;	switch (segControl.selectedSegmentIndex)	{		case 0:	// Time		{			datePickerView.datePickerMode = UIDatePickerModeTime;			segmentLabel.text = @"UIDatePickerModeTime";			break;		}		case 1: // Date		{				datePickerView.datePickerMode = UIDatePickerModeDate;			segmentLabel.text = @"UIDatePickerModeDate";			break;		}		case 2:	// Date & Time		{			datePickerView.datePickerMode = UIDatePickerModeDateAndTime;			segmentLabel.text = @"UIDatePickerModeDateAndTime";			break;		}		case 3:	// Counter		{			datePickerView.datePickerMode = UIDatePickerModeCountDownTimer;			segmentLabel.text = @"UIDatePickerModeCountDownTimer";			break;		}	}		// in case we previously chose the Counter style picker, make sure	// the current date is restored	NSDate *today = [NSDate date];	datePickerView.date = today;}- (void)togglePickers:(id)sender{	UISegmentedControl *segControl = sender;	switch (segControl.selectedSegmentIndex)	{		case 0:	// UIPickerView		{			pickerStyleSegmentedControl.hidden = YES;			segmentLabel.hidden = YES;			[self showPicker:myPickerView];			break;		}		case 1: // UIDatePicker		{				// start by showing the time picker						// initially set the picker style to "time" format			pickerStyleSegmentedControl.selectedSegmentIndex = 0.0;			pickerStyleSegmentedControl.hidden = NO;			segmentLabel.hidden = NO;			[self showPicker:datePickerView];			break;		}			case 2:	// Custom		{			pickerStyleSegmentedControl.hidden = YES;			segmentLabel.hidden = YES;			[self showPicker:customPickerView];				break;		}	}}- (void)pickerAction:(id)sender{	if (myPickerView != currentPicker)		[self showPicker:myPickerView];}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{	// if you want to only support portrait mode, do this	//return (interfaceOrientation == UIInterfaceOrientationPortrait);		return YES;}#pragma mark -#pragma mark PickerView delegate methods- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{	// report the selection to the UI label	label.text = [NSString stringWithFormat:@"%@ - %d",		[pickerViewArray objectAtIndex:[pickerView selectedRowInComponent:0]], [pickerView selectedRowInComponent:1]];}- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{	NSString *returnStr;	if (component == 0)	{		returnStr = [pickerViewArray objectAtIndex:row];	}	else	{		returnStr = [[NSNumber numberWithInt:row] stringValue];	}	return returnStr;}- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{	CGFloat componentWidth;	if (component == 0)		componentWidth = 240.0;	// first column size is wider to hold names	else		componentWidth = 40.0;	// second column is narrower to show numbers	return componentWidth;}- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{	return 40.0;}- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{	return [pickerViewArray count];}- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{	return 2;}#pragma mark UIViewController delegate methods// called after this controller's view was dismissed, covered or otherwise hidden- (void)viewWillDisappear:(BOOL)animated{	currentPicker.hidden = YES;		// restore the nav bar and status bar color to default	self.navigationController.navigationBar.barStyle = UIBarStyleDefault;	[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleDefault;}// called after this controller's view will appear- (void)viewWillAppear:(BOOL)animated{	[self togglePickers:buttonBarSegmentedControl];	// make sure the last picker is still showing		// for aesthetic reasons (the background is black), make the nav bar black for this particular page	self.navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;		// match the status bar with the nav bar	[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleBlackOpaque;}@end