Create a Date Picker for iPhone(Hide Past Date's)

         //Create a Date Picker

theDatePicker1 = [[UIDatePicker alloc] initWithFrame:CGRectMake(0.0,140.0, 320.0, 120.0)];
theDatePicker1.transform = CGAffineTransformMakeScale(1.0, 0.8); theDatePicker1.datePickerMode = UIDatePickerModeDate;
self.datePicker = theDatePicker1;
[theDatePicker1 release];
[datePicker addTarget:self 

                           action:@selector(dateChanged1)    

                           forControlEvents:UIControlEventValueChanged];

[self.view addSubview:datePicker];

       //Date Picker Hide the Past Dates Coding

        NSDate *now = [[NSDate alloc] init];
now = [now addTimeInterval:60*60];
NSLog(@"%@",now);
theDatePicker1.minimumDate = now;

        // Date Format Coding

-(void)dateChanged1
{
NSDateFormatter *df=[[NSDateFormatter alloc]init];
[df setFormatterBehavior:NSDateFormatterBehavior10_4];
[df setDateFormat:@"MM/dd/yyyy"];
txt1.text = [NSString stringWithFormat:@"%@",
[df stringFromDate:datePicker.date]];
[df release];
}

Add a UIPickerView in UIActionSheet for iOS

.h File

@interface ViewController : UIViewController<UIPickerViewDataSource, UIPickerViewDelegate, UITextFieldDelegate>

{

    

    IBOutlet UITextField *txtText;

  NSArray *arrState;

    UIPickerView *pktStatePicker;

    UIToolbar *mypickerToolbar;

    UIActionSheet *sheet;

}

-(IBAction)open:(id)sender;

@end

.m File

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad

{

    

    [super viewDidLoad];

    

    arrState=[[NSArray alloc]initWithObjects:@"NewYork",@"NewJercy",@"Carlifornia",@"Florida",@"Fremont",@"SantaClara",@"San Diego",@"San Fransisco",@"San Jose", nil];

   

    

    pktStatePicker = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 43 , 320, 480)];

    

    pktStatePicker.delegate = self;

    pktStatePicker.dataSource = self;

    

    [pktStatePicker  setShowsSelectionIndicator:YES];

    

    

    

    // Create done button in UIPickerView

    

    

    mypickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 56)];

    

    mypickerToolbar.barStyle = UIBarStyleBlackOpaque;

    

    [mypickerToolbar sizeToFit];

    

    

    NSMutableArray *barItems = [[NSMutableArray alloc] init];

    

    

    UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];

    

    [barItems addObject:flexSpace];

    

    

    UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(pickerDoneClicked)];

    

    [barItems addObject:doneBtn];

    

    

    [mypickerToolbar setItems:barItems animated:YES];

    

}

-(IBAction)open:(id)sender

{

    sheet = [[UIActionSheet alloc] initWithTitle:nil

                                                      delegate:self

                                             cancelButtonTitle:@"Done"

                                        destructiveButtonTitle:nil

                                             otherButtonTitles:nil];

    [sheet addSubview:pktStatePicker];

    [sheet showInView:self.view.superview];

    [sheet addSubview:mypickerToolbar];

    [sheet showInView:self.view.superview];

    

    [sheet setBounds:CGRectMake(0, 20, 320, 430)];

    

    [pktStatePicker release];

    [mypickerToolbar release];

    [sheet release];

}

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView

{

    

    return 1;

    

}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component

{

    

    return [arrState count];

    

}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component

{

    

    return [arrState objectAtIndex:row];

    

}

- (void) pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component

{

    NSLog(@"You selected this: %@", [arrState objectAtIndex: row]);

    txtText.text = [arrState objectAtIndex:row];

    

}

- (void)pickerDoneClicked

{

    NSLog(@"Done Clicked");

    

    [txtText resignFirstResponder];

    

    [sheet dismissWithClickedButtonIndex:0 animated:YES];

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

}

@end

Xib File:

Output:

Reference Sites - Download Samples & Reference Sites using iPhone/iPad Codings

Download Samples:

http://code4app.net/

Reference Sites:

http://santhoshrajs.blogspot.in/
http://iphonesoul.blogspot.in/
http://jainmarket.blogspot.in/
http://calnissi.blogspot.in/
http://soulwithmobiletechnology.blogspot.in/
http://iphonesdkdev.blogspot.in/
http://angelolloqui.blogspot.in/
http://kurrytran.blogspot.in/

http://www.techotopia.com/index.php/Main_Page
http://www.iphonesdkarticles.com/
http://theiphonewiki.com/wiki/index.php?title=Main_Page
http://www.edumobile.org/iphone/iphone-programming-tutorials/mapkit-example-in-iphone/
http://www.theappcodeblog.com/2011/03/06/maps-app-tutorial-part-1-create-an-app-to-display-a-map/

Click on UITextField to show a UIPickerView

Some time it is required in iPhone to add UIPickerView in UIActionSheet. Here are the steps to do that

In ViewController.h

@interface ViewController : UIViewController<UIPickerViewDataSource, UIPickerViewDelegate, UITextFieldDelegate>

{

IBOutlet UITextField *txtText;

NSArray *arrState;

   UIPickerView *pktStatePicker ;

   UIToolbar *mypickerToolbar;

}

In ViewController.m

@implementation ViewController

- (void)viewDidLoad

{

[super viewDidLoad];

arrState= [NSArray    initWithObjects:@"NewYork",@"NewJercy",@"Carlifornia",@"Florida",@"Fremont",@"SantaClara",@"San Diego",@"San Fransisco",@"San Jose", nil];

pktStatePicker = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 43, 320, 480)];

pktStatePicker.delegate = self;

pktStatePicker.dataSource = self;

[pktStatePicker  setShowsSelectionIndicator:YES];

txtText.inputView =  pktStatePicker  ;

// Create done button in UIPickerView

mypickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 56)];

mypickerToolbar.barStyle = UIBarStyleBlackOpaque;

[mypickerToolbar sizeToFit];

NSMutableArray *barItems = [[NSMutableArray alloc] init];

UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];

[barItems addObject:flexSpace];

UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:selfaction:@selector(pickerDoneClicked)];

[barItems addObject:doneBtn];

[mypickerToolbar setItems:barItems animated:YES];

txtText.inputAccessoryView = mypickerToolbar;

}

-(void)pickerDoneClicked

{

NSLog(@"Done Clicked");

[txtText resignFirstResponder];

  mypickerToolbar.hidden=YES;

  pktStatePicker.hidden=YES;

}

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView

{

return 1;

}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component

{

return [arrState count];

}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component

{

return [arrState objectAtIndex:row];

}

- (void) pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component

{

txtText.text = [arrState objectAtIndex:row];

}

Code for Text Field & UITextView Not Allowed Special Characters and Spaces in iPhone & iPad

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

{

    if(textField == aText)

   {

         if ([string isEqualToString:@"&"] || [string isEqualToString:@" "] ) 

        {

               return NO;

        }

   }

}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

{

if(textField == TextField)

{

        

        if ([string length] == 0 && range.length > 0)

        {

            TextField.text = [TextField.text stringByReplacingCharactersInRange:range withString:string];

            return NO;

        }

        

        NSCharacterSet *nonNumberSet = [[NSCharacterSet characterSetWithCharactersInString:@"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"] invertedSet];

        if ([string stringByTrimmingCharactersInSet:nonNumberSet].length > 0)

        {

            return YES;

        }

        else

        {

            return NO;

        }

}

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text

{

    if(textView == YourReview1)

    {

        if ([text isEqualToString:@"&"]||[text isEqualToString:@" "])

        {

            return NO;

        }

        return YES;

    }

}