clear uitextfield

- (void)textFieldDidBeginEditing:(UITextField *)textField{

    if ([textField.text isEqualToString:@""] || [[textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length] == 0)

    {

        [textField setText:@""];

        

    }    

}

Detect backspace in UITextField

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
    if (range.length > 0 && [text isEqualToString:@""]) {
        NSLog(@"press Backspace.");
    }
    return YES;
}

(OR)

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

if ([string isEqualToString:@""]) {

        return YES;

    }
}

UIDatePicker

.h file

@interface ViewController : UIViewController

{

    IBOutlet UIDatePicker *datePicker;

    IBOutlet UILabel *lblResult;

}

.m file

- (void)viewDidLoad

{

    [super viewDidLoad];

      datePicker.date = [NSDate date];    

    [datePicker addTarget:self

              action:@selector(datechange:)

    forControlEvents:UIControlEventValueChanged];

}

- (void)datechange:(id)sender{

NSDateFormatter *df = [[NSDateFormatter alloc] init];

//[df setDateFormat:@"yyyy-MM-dd"];

   df.dateStyle = NSDateFormatterMediumStyle;

lblResult.text = [NSString stringWithFormat:@"%@",

                      [df stringFromDate:datePicker.date]];

}

Removing the image on the left of an UISearchbar

.h file

@interface Search : UIViewController<UISearchBarDelegate>

{

IBOutlet UISearchBar *searchBar;

}

.m file


@interface Search (Private)

- (void)setSearchIconToFavicon;

@end





@implementation Search

- (void)viewDidLoad {

[self setSearchIconToFavicon];

[super viewDidLoad];

}

#pragma mark Private

- (void)setSearchIconToFavicon {

// Really a UISearchBarTextField, but the header is private.

UITextField *searchField = nil;

for (UIView *subview in searchBar.subviews) {

if ([subview isKindOfClass:[UITextField class]]) {

searchField = (UITextField *)subview;

break;

}

}

if (searchField) {  

UIImage *image = [UIImage imageNamed: @"favicon.png"];

UIImageView *iView = [[UIImageView alloc] initWithImage:image];

searchField.leftView = iView;

[iView release];

}  

} 

@end

change UISearchBar from round to rectangle

  for (UIView *searchBarSubview in [MySearchbarName subviews]) {

        if ([searchBarSubview conformsToProtocol:@protocol(UITextInputTraits)]) {

            @try {

                

                [(UITextField *)searchBarSubview setBorderStyle:UITextBorderStyleRoundedRect];

                [(UITextField *)searchBarSubview setBackgroundColor:[UIColor blackColor]];

                [(UITextField *)searchBarSubview setTextColor:[UIColor whiteColor]];

            }

            @catch (NSException * e) {

                // ignore exception

            }

        }

    }