Higlight the UI Button

IBOutlet NSButton * mode1;// declare buttons
IBOutlet NSButton * mode2;

- (void)highlightButton1:(UIButton *)a { 
    [mode1 setHighlighted:YES];
    [mode2 setHighlited:NO];
}

- (void)highlightButton2:(UIButton *)b { 
    [mode1 setHighlighted:NO];
    [mode2 setHighlited:YES];
}

Edit the Tableview Cell

- (void)tableView:(UITableView *)aTableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle 

forRowAtIndexPath:(NSIndexPath *)indexPath 

{

    

    //ADDING And Deleting CEll

    

    

    

    

    if (editingStyle == UITableViewCellEditingStyleDelete) 

{

        [Arr removeObjectAtIndex:indexPath.row];

[tab reloadData];

    } else if (editingStyle == UITableViewCellEditingStyleInsert)

{

        @try {

            [Arr addObject:addname.text];

        }

        @catch (NSException *exception) {

            [Arr addObject:@""];

        }

        [tab reloadData];

    }

}

Adding validation to UITextfields

Create the Function Named validate Input &Defined it as Given Below

-(BOOL)validateInput{

    

    BOOL retvalue=YES;

    NSString *throwmessage;

    

    if ([LocationName.text isEqualToString:@""] || LocationName.text==nil ) 

        

    {

        throwmessage=@"Please Enter Location Name";

        retvalue=NO;

    }

    

    else if ([City.text isEqualToString:@""] || City.text==nil ) 

        

    {

        throwmessage=@"Please Enter City ";

        retvalue=NO;

    }

    else if ([Area.text isEqualToString:@""] || Area.text==nil ) 

        

    {

        throwmessage=@"Please Enter Area ";

        retvalue=NO;

    }

    

    else if ([State.text isEqualToString:@""] || State.text==nil ) 

        

    {

        throwmessage=@"Please Enter State";

        retvalue=NO;

    }

    

    else if ([Country.text isEqualToString:@""] || Country.text==nil ) 

        

    {

        throwmessage=@"Please Enter Contact Number ";

        retvalue=NO;

    }

      

    if (retvalue==NO) 

    {

        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:nil message:throwmessage delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];

        [alert show];

        [alert release];       

    }

    return  retvalue;

    

}   

Check 0r call this function When Required

Such AS

-(IBAction)Save{

if([self validateinput]){

}

else{

}

A Quick Guide For NSUserDefaults

Here is a quick reference for some of the things you can do with NSUserDefaults

Saving

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

// saving an NSString
[prefs setObject:@"TextToSave" forKey:@"keyToLookupString"];

// saving an NSInteger
[prefs setInteger:42 forKey:@"integerKey"];

// saving a Double
[prefs setDouble:3.1415 forKey:@"doubleKey"];

// saving a Float
[prefs setFloat:1.2345678 forKey:@"floatKey"];

// This is suggested to synch prefs, but is not needed (I didn't put it in my tut)
[prefs synchronize];

Retrieving

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

// getting an NSString
NSString *myString = [prefs stringForKey:@"keyToLookupString"];

// getting an NSInteger
NSInteger myInt = [prefs integerForKey:@"integerKey"];

// getting an Float
float myFloat = [prefs floatForKey:@"floatKey"];

Adding textField in UIAlertView

UIAlertView* myAlert = [[UIAlertView alloc] initWithTitle:@"Enter Name" message:@"Enter Name
" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];

[myAlert addTextFieldWithValue:@"" label:@"name-age"];
myTextField = [myAlert textFieldAtIndex:0];
myTextField.clearButtonMode = UITextFieldViewModeWhileEditing;
myTextField.keyboardType = UIKeyboardTypeAlphabet;
myTextField.keyboardAppearance = UIKeyboardAppearanceAlert;
myTextField.autocapitalizationType  = UITextAutocapitalizationTypeWords;
myTextField.autocorrectionType = UITextAutocapitalizationTypeNone;
myTextField.textAlignment = UITextAlignmentCenter;

[myAlert show];
[myAlert release];

How to Change the AlertView backround

       

       UIImage *theImage = [UIImage imageNamed:@"alert.png"];    

       theImage = [theImage stretchableImageWithLeftCapWidth:16 topCapHeight:16];

        CGSize theSize = [deletealert frame].size;

        

        UIGraphicsBeginImageContext(theSize);    

        [theImage drawInRect:CGRectMake(0, 0, theSize.width, theSize.height)];    

        theImage = UIGraphicsGetImageFromCurrentImageContext();    

        UIGraphicsEndImageContext();

        

        [[deletealert layer] setContents:[theImage CGImage]];

        [deletealert release];

        

        

Email validation in iphone

- (BOOL) isValidEmail:(NSString *) email {

errorMessage = [NSMutableString stringWithString: @""];

BOOL validEmail = YES;

NSString *emailRegex = @"[a-zA-Z0-9.\\-_]{2,32}@[a-zA-Z0-9.\\-_]{2,32}\[A-Za-z]{2,4}";

NSPredicate *regExPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];

validEmail = [regExPredicate evaluateWithObject:email];

if (!validEmail) {

errorMessage = [NSMutableString stringWithString:@"Invalid Email"];

        validEmail = NO;

        NSLog(@"Invalid Email");

}

if ([email length] > 30) {

errorMessage = [NSMutableString stringWithString:@"Very Long Email"];

validEmail = NO;

        NSLog(@"Very Long Email");

}

if ([email length] == ZERO_LENGTH) {

errorMessage = [NSMutableString stringWithString:@"Please type valid email id"];

validEmail = NO;

        NSLog(@"Please type valid email id");

}

return validEmail;

}