Removing extra separator lines for empty rows in UITableView

- (void) viewDidLoad
{
  [super viewDidLoad];

  self.tableView.tableFooterView = [[[UIView alloc] init] autorelease];
}

iPhone - Create custom UITableViewCell top and bottom borders

tableView.separatorStyle = UITableViewCellSeparatorStyleNone;

// Draw top border only on first cell

if (indexPath.row == 0) {

    UIView *topLineView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 1)];

    topLineView.backgroundColor = [UIColor grayColor];

    [cell.contentView addSubview:topLineView];

}

UIView *bottomLineView = [[UIView alloc] initWithFrame:CGRectMake(0, cell.bounds.size.height, self.view.bounds.size.width, 1)];

bottomLineView.backgroundColor = [UIColor grayColor];

[cell.contentView addSubview:bottomLineView];

How to check document directory file your image is there or not

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder

    NSString *imagePath = [documentsDirectory stringByAppendingPathComponent:@"/progress/before.png"];

  if (![[NSFileManager defaultManager] fileExistsAtPath:imagePath])

    {

       //file not exits in Document Directories

        imageviewname.image = [UIImage imageNamed:@"add_photo_block_hires.png"];

    }

    else

    {

        //file exist in Document Directories

         imageviewname.image =[UIImage imageWithContentsOfFile:imagePath1];

    }

How to remove uiview from uiscrollview in iphone

      if([viewname superview]!=nil)

        {

            for(UIView *subview in [scrollviewname subviews]) {

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

                    [subview removeFromSuperview];

                }

            }

        }

Pop back to a specific viewcontroller in the navigationController

[self.navigationController popToViewController:[[self.navigationController viewControllers] objectAtIndex:2] animated:YES];

How to disable the scrollbar in scrollview

[scrollview setShowsHorizontalScrollIndicator:NO];
[scrollview setShowsVerticalScrollIndicator:NO];

UIScrollView getting the current page

int page = scrollView.contentOffset.x / scrollView.frame.size.width;

How to create folder and save multiple image for document directory in ios

.h file

@interface ViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate> {

    UIImagePickerController *picker;

    UIImage *image;

}

-(IBAction)ChooseExisting;

.m file

-(IBAction)ChooseExisting{

    picker = [[UIImagePickerController alloc]init];

    picker.delegate=self;

    [picker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];

    [self presentViewController:picker animated:YES completion:NULL];

    

}

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

    image = [info objectForKey:UIImagePickerControllerOriginalImage];

    [self dismissViewControllerAnimated:YES completion:NULL];    

    if (image != nil)

    {      

        NSError *error;

        NSString *aDocumentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

        NSString *dataPath = [aDocumentsDirectory stringByAppendingPathComponent:@"Image"];

        [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error];       

      

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

        [format setDateFormat:@"yyyyMMddHHmmss"];

        NSDate *now = [NSDate date];

        NSString *retStr = [format stringFromDate:now];        

                

            NSString *anImageName = [NSString stringWithFormat:@"%@.png", retStr];

             NSString *anImagePath = [NSString stringWithFormat:@"%@/%@", dataPath, anImageName];

            NSLog(@"the path is=%@",anImagePath);

            

            NSData *anImageData = UIImagePNGRepresentation(image);

            [anImageData writeToFile:anImagePath atomically:YES];      

       

    }

    

}

How to save image document directory in ios

.h file

@interface ViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate>

 {

    UIImagePickerController *picker;

    UIImage *image;

}

-(IBAction)ChooseExisting;

- (IBAction)btnSave:(id)sender;

.m file

-(IBAction)ChooseExisting{

    picker = [[UIImagePickerController alloc]init];

    picker.delegate=self;

    [picker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];

    [self presentViewController:picker animated:YES completion:NULL];

    

}

- (IBAction)btnSave:(id)sender {    

    if (image != nil)

    {

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,

                                                             NSUserDomainMask, YES);

        NSString *documentsDirectory = [paths objectAtIndex:0];

        NSString* path = [documentsDirectory stringByAppendingPathComponent:

                          [NSString stringWithFormat: @"imagename.png"]];

        NSData* data = UIImagePNGRepresentation(image);

        [data writeToFile:path atomically:YES];     

    }

}

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

    image = [info objectForKey:UIImagePickerControllerOriginalImage];

    [self dismissViewControllerAnimated:YES completion:NULL];

}

Validate length and restrict textfield to Numeric, alphanumeric, and alpha characters only

#define ALPHA @"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"

#define NUMERIC @"1234567890"

#define ALPHA_NUMERIC ALPHA NUMERIC

#define MAX_LENGTH 25

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

    if(textField== textfieldname)

    {           

        NSUInteger newLength = [textField.text length] + [string length] - range.length;

        

        NSCharacterSet *unacceptedInput =

        [[NSCharacterSet characterSetWithCharactersInString:ALPHA_NUMERIC] invertedSet];

        if ([[string componentsSeparatedByCharactersInSet:unacceptedInput] count] > 1)

            return NO;

        else

            return YES&&(newLength < MAX_LENGTH);

        return YES;

    }else{

        return NO;

    }

}

allow only alphanumeric characters for a UITextField

#define ALPHA                   @"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
#define NUMERIC                 @"1234567890"
#define ALPHA_NUMERIC           ALPHA NUMERIC

// Make sure you are the text fields 'delegate', then this will get called before text gets changed.
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

    // This will be the character set of characters I do not want in my text field.  Then if the replacement string contains any of the characters, return NO so that the text does not change.
    NSCharacterSet *unacceptedInput = nil;

    // I have 4 types of textFields in my view, each one needs to deny a specific set of characters:
    if (textField == emailField) {
        //  Validating an email address doesnt work 100% yet, but I am working on it....  The rest work great!
        if ([[textField.text componentsSeparatedByString:@"@"] count] > 1) {
            unacceptedInput = [[NSCharacterSet characterSetWithCharactersInString:[ALPHA_NUMERIC stringByAppendingString:@".-"]] invertedSet];
        } else {
            unacceptedInput = [[NSCharacterSet characterSetWithCharactersInString:[ALPHA_NUMERIC stringByAppendingString:@".!#$%&'*+-/=?^_`{|}~@"]] invertedSet];
        }
    } else if (textField == phoneField) {
        unacceptedInput = [[NSCharacterSet characterSetWithCharactersInString:NUMERIC] invertedSet];
    } else if (textField == fNameField || textField == lNameField) {
        unacceptedInput = [[NSCharacterSet characterSetWithCharactersInString:ALPHA] invertedSet];
    } else {
        unacceptedInput = [[NSCharacterSet illegalCharacterSet] invertedSet];
    }

    // If there are any characters that I do not want in the text field, return NO.
    return ([[string componentsSeparatedByCharactersInSet:unacceptedInput] count] <= 1);
}

Action on UILabel in iphone

[titleLbl setUserInteractionEnabled:YES];

UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(labelButton:)];

[tapGestureRecognizer setNumberOfTapsRequired:1];

[titleLbl addGestureRecognizer:tapGestureRecognizer];

[tapGestureRecognizer release];

UIScrollview Autolayout Issue

.h file

@property (assign,nonatomic) CGPoint scrollviewContentOffsetChange;

.m file

- (void)viewWillAppear:(BOOL)animated {

    [super viewWillAppear:animated];

    self.scrollView.contentOffset = CGPointZero;

}

- (void)viewWillDisappear:(BOOL)animated {

    [super viewWillDisappear:animated];

    self.scrollviewContentOffsetChange = self.scrollView.contentOffset;

}

- (void)viewDidLayoutSubviews {

    [super viewDidLayoutSubviews];

     self.scrollView.contentOffset = self.scrollviewContentOffsetChange;

}

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

            }

        }

    }

Removing the Keyboard when done.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    [nameoftextfield resignFirstResponder];

}

Day Calendar

.h file

@interface ViewController : UIViewController {    

UIImageView *_topBackground;

UIButton *_leftArrow, *_rightArrow;

UILabel *_dateLabel;

IBOutlet UILabel *result;

NSDate *day1;

}

.m file

#import <QuartzCore/QuartzCore.h> 

static NSString *TOP_BACKGROUND_IMAGE                    = @"ma_topBackground.png";

static NSString *LEFT_ARROW_IMAGE                        = @"ma_leftArrow.png";

static NSString *RIGHT_ARROW_IMAGE                       = @"ma_rightArrow.png";

static const unsigned int ARROW_LEFT                     = 100;

static const unsigned int ARROW_RIGHT                    = 101;

static const unsigned int ARROW_WIDTH                    = 48;

static const unsigned int ARROW_HEIGHT                   = 38;

static const unsigned int TOP_BACKGROUND_HEIGHT          = 95; 

#define CURRENT_CALENDAR [NSCalendar currentCalendar]

#define DATE_COMPONENTS (NSYearCalendarUnit| NSMonthCalendarUnit | NSDayCalendarUnit)

@interface ViewController()

- (void)changeDay:(UIButton *)sender;

- (NSDate *)nextDayFromDate:(NSDate *)date;

- (NSDate *)previousDayFromDate:(NSDate *)date;

@property (readonly) UIImageView *topBackground;

@property (readonly) UIButton *leftArrow;

@property (readonly) UIButton *rightArrow;

@property (readonly) UILabel *dateLabel; 

@property (readonly) UIFont *regularFont;

@property (readonly) UIFont *boldFont;

@property (readonly) NSString *titleText;

@end

@implementation ViewController

- (UIImageView *)topBackground {

if (!_topBackground) {

_topBackground = [[UIImageView alloc] initWithImage:[UIImage imageNamed:TOP_BACKGROUND_IMAGE]];

}

return _topBackground;

}

- (UIButton *)leftArrow {

if (!_leftArrow) {

_leftArrow = [UIButton buttonWithType:UIButtonTypeCustom];

_leftArrow.tag = ARROW_LEFT;

[_leftArrow setImage:[UIImage imageNamed:LEFT_ARROW_IMAGE] forState:0];

[_leftArrow addTarget:self action:@selector(changeDay:) forControlEvents:UIControlEventTouchUpInside];

}

return _leftArrow;

}

- (UIButton *)rightArrow {

if (!_rightArrow) {

_rightArrow = [UIButton buttonWithType:UIButtonTypeCustom];

_rightArrow.tag = ARROW_RIGHT;

[_rightArrow setImage:[UIImage imageNamed:RIGHT_ARROW_IMAGE] forState:0];

[_rightArrow addTarget:self action:@selector(changeDay:) forControlEvents:UIControlEventTouchUpInside];

}

return _rightArrow;

}

- (UILabel *)dateLabel {

if (!_dateLabel) {

_dateLabel = [[UILabel alloc] init];

_dateLabel.textAlignment = NSTextAlignmentCenter;

_dateLabel.backgroundColor = [UIColor clearColor];

_dateLabel.font = [UIFont boldSystemFontOfSize:18];

_dateLabel.textColor = [UIColor colorWithRed:59/255. green:73/255. blue:88/255. alpha:1];

}

return _dateLabel;

}

- (void)setDay:(NSDate *)date {     

NSDateComponents *components = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:date];

day1 = [CURRENT_CALENDAR dateFromComponents:components];

    [day1 copy];

  self.dateLabel.text = [self titleText];

    

    NSString *str = self.dateLabel.text;

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

    [dateFormatter setDateFormat:@"MM/dd/yyyy"];

    NSDate *date1 = [dateFormatter dateFromString: str];

    dateFormatter = [[NSDateFormatter alloc] init] ;

    [dateFormatter setDateFormat:@"yyyy-MM-dd"];

    NSString *convertedString = [dateFormatter stringFromDate:date1];

    result.text = convertedString;

    

    NSDate *today = [NSDate date];

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

    [dateFormat setDateFormat:@"MM/dd/yyyy"];

    NSString *dateString = [dateFormat stringFromDate:today];

    NSLog(@"datestring %@",dateString);

    NSLog(@"cur1: %@",self.dateLabel.text);

       

}

- (void)changeDay:(UIButton *)sender {

   

if (ARROW_LEFT == sender.tag) {

self.day = [self previousDayFromDate:day1];

} else if (ARROW_RIGHT == sender.tag) {

      self.day = [self nextDayFromDate:day1];

}   

}

- (NSDate *)nextDayFromDate:(NSDate *)date {

NSDateComponents *components = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:date];

[components setDay:[components day] + 1];

return [CURRENT_CALENDAR dateFromComponents:components];

}

- (NSDate *)previousDayFromDate:(NSDate *)date {

    

    NSDate *today = [NSDate date];

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

    [dateFormat setDateFormat:@"MM/dd/yyyy"];

    NSString *dateString = [dateFormat stringFromDate:today];

    NSLog(@"datestring %@",dateString);

    NSLog(@"cur1: %@",self.dateLabel.text);

     

    if (dateString == self.dateLabel.text) {    

        NSDateComponents *components = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:date];

        [components setDay:[components day]];

        return [CURRENT_CALENDAR dateFromComponents:components];       

    }else{

         NSDateComponents *components = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:date];

        [components setDay:[components day] - 1];

        return [CURRENT_CALENDAR dateFromComponents:components];

       

    }

}

- (NSString *)titleText {

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

    [formatter setDateFormat:@"MM/dd/yyyy"]; 

return [NSString stringWithFormat:@"%@",

[formatter stringFromDate:day1]];

} 

- (void)viewDidLoad

{

     self.rightArrow.frame = CGRectMake(280, 60, 20, 20);

    [self.view addSubview:_rightArrow];

    self.leftArrow.frame = CGRectMake(10, 60, 20, 20);

    [self.view addSubview:_leftArrow];

   

    self.day = [NSDate date];

    

    [self.view addSubview:_dateLabel];

    self.dateLabel.frame = CGRectMake(60, 0, 200, 150);

    self.topBackground.frame = CGRectMake(0, 0, 320, 45);

   [self.view addSubview:_topBackground];

       

   [super viewDidLoad];

}

@end