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);
}