Function to validate TextField and String

+ (BOOL) validateTextField: (UITextField*)textField

{

    if(!textField){

        return NO;

    }

    

    textField.text = [textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

    if ([textField.text isEqualToString:@""]) {

        return NO;

    }

    return YES;

}

+ (BOOL) validateString: (NSString*)string

{

    if(!string)

    {

        return NO;

    }

    string = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

    if([string  isEqualToString:@""] || [string isEqual:[NSNull null]] || string == nil || [string  length]==0)

    {

        return NO;

    }

    return YES;

}