Just Change your date from current format to another ...

I create this method for convert some string date format to convert in another format...

Call bellow method with its 3 parameters..

1. stringDate : Pass your date which in string type.

2. dateFormat : set format which is use in your passed string date. For ex if your string date is "14-03-2013 11:22 am" then set format @"dd-MM-yyyy hh:mm a".

3. getwithFormat : Set format which you want like if you want date "14/03/2013" then just set format @"dd/MM/yyyy".

How to call this see bellow example with method..

NSString *strSDate = [self changeDateFormat:@"14-03-2013 11:22 am" dateFormat:@"dd-MM-yyyy hh:mm a" getwithFormat:@"dd/MM/yyyy"];

Output is : 14/03/2013

-(NSString *)changeDateFormat:(NSString*)stringDate dateFormat:(NSString*)dateFormat getwithFormat:(NSString *)getwithFormat{

    

    

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

    [dateFormatter setDateFormat:dateFormat];

    

    NSDate *date = [dateFormatter dateFromString:stringDate];

    

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

    [dateFormatter setDateFormat:getwithFormat];

    

    NSString *convertedString = [dateFormatter stringFromDate:date];

    NSLog(@"Converted String : %@",convertedString);

    return convertedString;

}


Also Get Date in NSDate from NSString with my bellow custom Method...

-(NSDate *)convertStringToDate:(NSString *) date dateFormat:(NSString*)dateFormat{

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

    NSDate *nowDate = [[[NSDate alloc] init] autorelease];

    [formatter setDateFormat:dateFormat];// set format here which format in string date

    date = [date stringByReplacingOccurrencesOfString:@"+0000" withString:@""];

    nowDate = [formatter dateFromString:date];

    // NSLog(@"date============================>>>>>>>>>>>>>>> : %@", nowDate);

    return nowDate;

}

and use it like bellow...

NSDate *startDate = [self convertStringToDate:@"2013-05-27 19:00" dateFormate:@"yyyy-MM-dd HH:mm"];

NSDate *endDate = [self convertStringToDate:@"2013-05-27 20:00" dateFormate:@"yyyy-MM-dd HH:mm"];

not get iPhone simulator option on xcode? see this bellow answer

Some time you not seen the iPhone simulator option on xcode and just see the "Mac 64-bit" option.

so for get iPhone simulator option on xcode just change base SDK in project -> Build Setting and just set  "latest ios sdk" option instead of other.

Also see this bellow link with some other answers :

xcode-ios-project-only-shows-my-mac-64-bit-but-not-simulator-or-device

How To change day like calendar's next prev button..

#pragma mark view calnder Next Prev

-(IBAction)btnRigth_Clicked:(id)sender{

    NSLog(@"\n Right Button Clicked");

    [self NextDate:lblTitleDate.text];

}

-(IBAction)btnLeft_Clicked:(id)sender{

    NSLog(@"\n Left Button Clicked");

    [self PrevDate:lblTitleDate.text];

}

-(void)NextDate:(NSString *)strDate{

    

    NSDate *selectedDate = [[NSDate alloc]init];

    selectedDate = [self convertStringToDate:strDate];

    

    // start by retrieving day, weekday, month and year components for yourDate

    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

    NSDateComponents *todayComponents = [gregorian components:(NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit) fromDate:selectedDate];

    NSInteger theDay = [todayComponents day];

    NSInteger theMonth = [todayComponents month];

    NSInteger theYear = [todayComponents year];

    

    // now build a NSDate object for yourDate using these components

    NSDateComponents *components = [[NSDateComponents alloc] init];

    [components setDay:theDay]; 

    [components setMonth:theMonth]; 

    [components setYear:theYear];

    NSDate *thisDate = [gregorian dateFromComponents:components];

    [components release];

    

    // now build a NSDate object for the next day

    NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];

    [offsetComponents setDay:1];

    NSDate *nextDate = [gregorian dateByAddingComponents:offsetComponents toDate:thisDate options:0];

    [offsetComponents release];

    [gregorian release];

    lblTitleDate.text = [self convertDateToString:nextDate];

}

-(void)PrevDate:(NSString *)strDate{

    

    NSDate *selectedDate = [[NSDate alloc]init];

    selectedDate = [self convertStringToDate:strDate];

    // start by retrieving day, weekday, month and year components for yourDate

    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

    NSDateComponents *todayComponents = [gregorian components:(NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit) fromDate:selectedDate];

    NSInteger theDay = [todayComponents day];

    NSInteger theMonth = [todayComponents month];

    NSInteger theYear = [todayComponents year];

    

    // now build a NSDate object for yourDate using these components

    NSDateComponents *components = [[NSDateComponents alloc] init];

    [components setDay:theDay]; 

    [components setMonth:theMonth]; 

    [components setYear:theYear];

    NSDate *thisDate = [gregorian dateFromComponents:components];

    [components release];

    

    // now build a NSDate object for the next day

    NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];

    [offsetComponents setDay:-1];

    NSDate *prevDate = [gregorian dateByAddingComponents:offsetComponents toDate:thisDate options:0];

    [offsetComponents release];

    [gregorian release];

    lblTitleDate.text = [self convertDateToString:prevDate];

}

-(NSDate *)convertStringToDate:(NSString *) date {

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

    NSDate *nowDate = [[[NSDate alloc] init] autorelease];

    [formatter setDateFormat:@"EEEE, dd MMM yyyy"];// set format here which format in string date

    date = [date stringByReplacingOccurrencesOfString:@"+0000" withString:@""];

    nowDate = [formatter dateFromString:date];

    // NSLog(@"date============================>>>>>>>>>>>>>>> : %@", nowDate);

    return nowDate;

}

-(NSString *)convertDateToString:(NSDate *) date {

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

    NSString *nowDate = [[[NSString alloc] init] autorelease];

    [formatter setDateFormat:@"EEEE, dd MMM yyyy"];// set format here which format in string date

    

    nowDate = [formatter stringFromDate:date];

    // NSLog(@"date============================>>>>>>>>>>>>>>> : %@", nowDate);

    return nowDate;

}

Set Dyanamic Color or change the color of UIImage..

-(UIImage *)imageNamed:(NSString *)name withColor:(UIColor *)color{

    

    // load the image

//    NSString *name = @"badge.png";

    UIImage *img = [UIImage imageNamed:name];

    

    // begin a new image context, to draw our colored image onto

    UIGraphicsBeginImageContext(img.size);

    

    // get a reference to that context we created

    CGContextRef context = UIGraphicsGetCurrentContext();

    

    // set the fill color

    [color setFill];

    

    // translate/flip the graphics context (for transforming from CG* coords to UI* coords

    CGContextTranslateCTM(context, 0, img.size.height);

    CGContextScaleCTM(context, 1.0, -1.0);

    

    // set the blend mode to color burn, and the original image

    CGContextSetBlendMode(context, kCGBlendModeColorBurn);

    CGRect rect = CGRectMake(0, 0, img.size.width, img.size.height);

    CGContextDrawImage(context, rect, img.CGImage);

    

    // set a mask that matches the shape of the image, then draw (color burn) a colored rectangle

    CGContextClipToMask(context, rect, img.CGImage);

    CGContextAddRect(context, rect);

    CGContextDrawPath(context,kCGPathFill);

    

    // generate a new UIImage from the graphics context we drew onto

    UIImage *coloredImg = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    

    //return the color-burned image

    return coloredImg;

}

use this like bellow...

    yourImageView.image = [self imageNamed:@"yourImageName" withColor:[UIColor orangeColor]];

See this link also...

My Answer from changing-the-color-of-image-in-iphone-sdk 

and other link

http://coffeeshopped.com/2010/09/iphone-how-to-dynamically-color-a-uiimage

Validation for Number with character limit

- (BOOL)NumberValidation:(NSString *)string  {

    NSUInteger newLength = [string length];

    NSCharacterSet *cs = [[NSCharacterSet characterSetWithCharactersInString:@"1234567890"] invertedSet];

    NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];

    return (([string isEqualToString:filtered])&&(newLength <= 3));

}

in your button action event just use this like bellow...

-(IBAction)ButtonPress{

    

    if ([self NumberValidation:yourString]) {

        NSLog(@"Macth here");

    }

    else {

        NSLog(@"Not Match here");

    }

}

http://stackoverflow.com/questions/9477563/how-to-enter-numbers-only-in-uitextfield-and-limit-maximum-length

presentViewController:animated:completion: is available on iOS5 and above only, hence you get that crash.

 presentViewController:animated:completion: is available on iOS5 and above only, hence you get that crash.

Change the last part to:

if ([MFMailComposeViewController canSendMail]) 

        {

            UIImage *tempImageSave=[self captureView];

            //                imgBackBoard.image = [self captureView];

            //                [imgBackBoard.image retain];

            MFMailComposeViewController *mailComposeViewController = [[MFMailComposeViewController alloc] init];

            NSString *mailBody = @"New Image Of Retreat Caravans Posted By Paras";

            

            NSData *imageData = UIImagePNGRepresentation(tempImageSave);

            [mailComposeViewController addAttachmentData:imageData mimeType:@"image/png" fileName:@"Testing"];

            [mailComposeViewController setMessageBody:mailBody isHTML:NO];

            mailComposeViewController.mailComposeDelegate = self;

            if ([self respondsToSelector:@selector(presentViewController:animated:completion:)])

            {   //yes->so do it!

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

            }

            else

            {   //nope->we seem to be running on something prior to iOS5, do it the old way!

                [self presentModalViewController:mailComposeViewController animated:YES];

            }

//            [self presentViewController:mailComposeViewController animated:YES completion:nil];

        } 

        else 

        {

            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"e-Mail Sending Alert"

                                                            message:@"You can't send a mail"

                                                           delegate:nil

                                                  cancelButtonTitle:@"OK" 

                                                  otherButtonTitles:nil];

            [alert show];

            [alert release];

        }

Also dissmis like above..
For EX..

if([self respondsToSelector:@selector(dismissViewControllerAnimated:completion:)])

        [self dismissViewControllerAnimated:YES completion:nil];

    else

        [self dismissModalViewControllerAnimated:YES];

This will first check if the new way of presenting a viewController is supported. For making sure that this works fine in the future, as presentModalViewController: is marked as being deprecated, we only use that option if the new way is not available.

Get Device Model or Device Type and platform...

just use this bellow method and you will got the Device platform or Device Type

- (NSString *) platformString{

    // Gets a string with the device model

    size_t size;  

    sysctlbyname("hw.machine", NULL, &size, NULL, 0);  

    char *machine = malloc(size);  

    sysctlbyname("hw.machine", machine, &size, NULL, 0);  

    NSString *platform = [NSString stringWithCString:machine encoding:NSUTF8StringEncoding];  

    free(machine); 

    if ([platform isEqualToString:@"iPhone1,1"])    return @"iPhone 2G";

    if ([platform isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";

    if ([platform isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";

    if ([platform isEqualToString:@"iPhone3,1"])    return @"iPhone 4";

    if ([platform isEqualToString:@"iPhone3,2"])    return @"iPhone 4";

    if ([platform isEqualToString:@"iPhone3,3"])    return @"iPhone 4 (CDMA)";    

    if ([platform isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";

    if ([platform isEqualToString:@"iPhone5,1"])    return @"iPhone 5";

    if ([platform isEqualToString:@"iPhone5,2"])    return @"iPhone 5 (GSM+CDMA)";

    

    if ([platform isEqualToString:@"iPod1,1"])      return @"iPod Touch (1 Gen)";

    if ([platform isEqualToString:@"iPod2,1"])      return @"iPod Touch (2 Gen)";

    if ([platform isEqualToString:@"iPod3,1"])      return @"iPod Touch (3 Gen)";

    if ([platform isEqualToString:@"iPod4,1"])      return @"iPod Touch (4 Gen)";

    if ([platform isEqualToString:@"iPod5,1"])      return @"iPod Touch (5 Gen)";

    

    if ([platform isEqualToString:@"iPad1,1"])      return @"iPad";

    if ([platform isEqualToString:@"iPad1,2"])      return @"iPad 3G";

    if ([platform isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";

    if ([platform isEqualToString:@"iPad2,2"])      return @"iPad 2";

    if ([platform isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";

    if ([platform isEqualToString:@"iPad2,4"])      return @"iPad 2";

    if ([platform isEqualToString:@"iPad2,5"])      return @"iPad Mini (WiFi)";

    if ([platform isEqualToString:@"iPad2,6"])      return @"iPad Mini";

    if ([platform isEqualToString:@"iPad2,7"])      return @"iPad Mini (GSM+CDMA)";

    if ([platform isEqualToString:@"iPad3,1"])      return @"iPad 3 (WiFi)";

    if ([platform isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM+CDMA)";

    if ([platform isEqualToString:@"iPad3,3"])      return @"iPad 3";

    if ([platform isEqualToString:@"iPad3,4"])      return @"iPad 4 (WiFi)";

    if ([platform isEqualToString:@"iPad3,5"])      return @"iPad 4";

    if ([platform isEqualToString:@"iPad3,6"])      return @"iPad 4 (GSM+CDMA)";

    

    if ([platform isEqualToString:@"i386"])         return @"Simulator";

    if ([platform isEqualToString:@"x86_64"])       return @"Simulator";

    return platform;

}