iPhone

开发平台：

MultiPlatform

SingleComponentPickerViewController.m：源码内容

							//
//  SingleComponentPickerViewController.m
//  Pickers
//
//  Created by Jeff LaMarche on 7/7/08.
//  Copyright 2008 __MyCompanyName__. All rights reserved.
//
#import "SingleComponentPickerViewController.h"
@implementation SingleComponentPickerViewController
@synthesize singlePicker;
@synthesize pickerData;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
	if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
		// Initialization code
	}
	return self;
}
- (IBAction)buttonPressed:(id)sender
{
	NSInteger row = [singlePicker selectedRowInComponent:0];
	NSString *selected = [pickerData objectAtIndex:row];
	NSString *title = [[NSString alloc] initWithFormat:@"You selected %@!", selected];
	UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:@"Thank you for choosing." delegate:nil cancelButtonTitle:@"You're Welcome" otherButtonTitles:nil];
	[alert show];
	[alert release];
	[title release];
}
- (void)viewDidLoad {
	NSArray *array = [[NSArray alloc] initWithObjects:@"Luke", @"Leia", @"Han", @"Chewbacca", @"Artoo", @"Threepio", @"Lando", nil];
	self.pickerData = array;
	[array release];
	 
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
	// Return YES for supported orientations
	return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (void)didReceiveMemoryWarning {
	[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview
	// Release anything that's not essential, such as cached data
}
- (void)dealloc {
	[singlePicker release];
	[pickerData release];
	[super dealloc];
}
#pragma mark -
#pragma mark Picker Data Source Methods
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
	return 1;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
	return [pickerData count];
}
#pragma mark Picker Delegate Methods
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
	return [pickerData objectAtIndex:row];
}
@end

						