TextField validation

-(BOOL)validateFname:(NSString*)name {    

    if ([name length ]== 0)  {

        return NO;

    }    

    return YES;

}

- (IBAction)btnSave_Clicked:(id)sender

{

    if(![self validateFname:nametxt.text]) {

        connectFailMessage = [[UIAlertView alloc] initWithTitle:@"Error!" message:@"Food items can not be empty!"  delegate: self cancelButtonTitle:@"OK" otherButtonTitles: nil];

        connectFailMessage.tag = 1002;

        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(95,15,22, 22)]; 

        NSString *imgPath = [[NSString alloc] initWithString:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"button_cancel.png"]];

        UIImage *yourImage = [[UIImage alloc] initWithContentsOfFile:imgPath];

        [imageView setImage:yourImage];

        [yourImage release];

        [imgPath release];

        [connectFailMessage addSubview:imageView];

        [connectFailMessage show];

        UILabel *theTitle1 = [connectFailMessage valueForKey:@"_titleLabel"];

        [theTitle1 setFont:[UIFont fontWithName:@"Avenir bold" size:16]];

        [theTitle1 setTextColor:[UIColor redColor]];

        UILabel *theBody1 = [connectFailMessage valueForKey:@"_bodyTextLabel"];

        [theBody1 setFont:[UIFont fontWithName:@"Avenir" size:15]];

        [theBody1 setTextColor:[UIColor whiteColor]];

        

        return;

    }

}

Create Customize ActivityIndicatorView

   .h file

@interface RootViewController : UIViewController {

UIActivityIndicatorView *activityView;

UIView *loadingView;

UILabel *loadingLabel;

}
@property (nonatomic, retain) UIActivityIndicatorView * activityView;

@property (nonatomic, retain) UIView *loadingView;

@property (nonatomic, retain) UILabel *loadingLabel;



.m file

#import <QuartzCore/QuartzCore.h>

@synthesize activityView;

@synthesize loadingView;

@synthesize loadingLabel;

  loadingView = [[UIView alloc] initWithFrame:CGRectMake(x, y, width, height)];

     loadingView.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5];

     loadingView.clipsToBounds = YES;

     loadingView.layer.cornerRadius = 10.0;

     activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

     activityView.frame = CGRectMake(65, 40, activityView.bounds.size.width, activityView.bounds.size.height);

    [loadingView addSubview:activityView];

    loadingLabel = [[UILabel alloc] initWithFrame:CGRectMake(x, y, width, height)];

    loadingLabel.backgroundColor = [UIColor clearColor];

    loadingLabel.textColor = [UIColor whiteColor];

    loadingLabel.adjustsFontSizeToFitWidth = YES;

    loadingLabel.textAlignment = UITextAlignmentCenter;

    loadingLabel.text = @"Loading...";

    [loadingView addSubview:loadingLabel]; 

    [self.view addSubview:loadingView];



[activityView startAnimating];

[activityView stopAnimating];

[loadingView removeFromSuperview];

How to pass button tag value one controller to another controller

First controller:

    button_name.tag = value;

    NSInteger theInteger =  button_name.tag;

   Second_controller *next = [[Second_controller alloc]ini];

   [next setMyInteger:theInteger];

   [self.navigationController pushViewController:next animated:YES];

Second controller:

@property(nonatomic) NSInteger myInteger;