How to handle view positions when keyboard hide and show time in Iphone:

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In this post My topic is ,

 How to handle view positions  when keyboard  hide and show time in Iphone:

1)KeyBoardViewController.xib you need to set delegate to all UItextFields

2)In the  KeyBoardViewController.h file, add the following code in bold:

#import <UIKit/UIKit.h>

@interface KeyBoardViewController : UIViewController<UIScrollViewDelegate,UITextFieldDelegate>

{

    IBOutlet UIScrollView *scrollView;

    UITextField *currentTextField;

    BOOL keyboardIsShown;

}

@property (nonatomic, retain) UIScrollView *scrollView;

@end

 3)In the  KeyBoardViewController.m file, add the following code in bold:

#import "KeyBoardViewController.h"

@interface KeyBoardViewController ()

@end

@implementation KeyBoardViewController

@synthesize scrollView;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

{

    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

    if (self) {

        // Custom initialization

    }

    return self;

}

- (void)viewDidLoad

{

    scrollView.frame = CGRectMake(0, 0, 320, 460); 

    [scrollView setContentSize:CGSizeMake(320, 480)];

    [super viewDidLoad];

// Do any additional setup after loading the view.

}

- (void)viewDidUnload

{

    [super viewDidUnload];

    // Release any retained subviews of the main view.

}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

    return (interfaceOrientation == UIInterfaceOrientationPortrait);

}

//—-before the View window appears—-

-(void) viewWillAppear:(BOOL)animated 

{

    //—-registers the notifications for keyboard—- 

    [[NSNotificationCenter defaultCenter]

     addObserver:self selector:@selector(keyboardDidShow:)

     name:UIKeyboardDidShowNotification object:self.view.window];

    [[NSNotificationCenter defaultCenter]

     addObserver:self selector:@selector(keyboardDidHide:)

     name:UIKeyboardDidHideNotification object:self.view.window];

    [super viewWillAppear:animated];

}

//—-when a

-(void) textFieldDidBeginEditing:(UITextField *)textFieldView 

{ 

    currentTextField = textFieldView;

}

//—-when the user taps on the return key on the keyboard—-

-(BOOL) textFieldShouldReturn:(UITextField *) textFieldView 

{

    [textFieldView resignFirstResponder];

    return NO;

}

//—-when a TextField view is done editing—-

-(void) textFieldDidEndEditing:(UITextField *) textFieldView 

{

    currentTextField = nil;

}

-(void) keyboardDidShow:(NSNotification *) notification 

{

    if (keyboardIsShown) return;

    NSDictionary* info = [notification userInfo];

    //—-obtain the size of the keyboard—-

    NSValue *aValue =

    [info objectForKey:UIKeyboardFrameEndUserInfoKey];

    CGRect keyboardRect =[self.view convertRect:[aValue CGRectValue] fromView:nil];

    NSLog(@"%f", keyboardRect.size.height);

    //—-resize the scroll view (with keyboard)—-

    CGRect viewFrame = [scrollView frame];

    viewFrame.size.height -= keyboardRect.size.height;

    scrollView.frame = viewFrame;

    //—-scroll to the current text field—-

    CGRect textFieldRect = [currentTextField frame];

    [scrollView scrollRectToVisible:textFieldRect animated:YES];

    keyboardIsShown = YES;

}

//—-when the keyboard disappears—-

-(void) keyboardDidHide:(NSNotification *) notification { 

    NSDictionary* info = [notification userInfo];

    //—-obtain the size of the keyboard—-

    NSValue* aValue =[info objectForKey:UIKeyboardFrameEndUserInfoKey];

    CGRect keyboardRect =[self.view convertRect:[aValue CGRectValue] fromView:nil];

    //—-resize the scroll view back to the original size // (without keyboard)—-

    CGRect viewFrame = [scrollView frame]; viewFrame.size.height += keyboardRect.size.height; scrollView.frame = viewFrame;

    keyboardIsShown = NO; 

}

//—-before the View window disappear—-

-(void) viewWillDisappear:(BOOL)animated { //—-removes the notifications for keyboard—- 

    [[NSNotificationCenter defaultCenter]removeObserver:self name:UIKeyboardDidShowNotification object:nil];

    [[NSNotificationCenter defaultCenter]removeObserver:self name:UIKeyboardDidHideNotification object:nil];

    [super viewWillDisappear:animated]; 

}

    

@end

Thank you