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;

}