scroll view is not responding when navigated again - iphone

Question

i had created a navigation based small application. When I click to the table row, it display controller having UIScrollView and number of TextFields added in it, when i returned back to main controller, then again i navigate to that controller, it do not scroll and still contain previous values in textfield. I am not able to know where is the problem.
Here is my code:
rootcontroller.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
switch(indexPath.row)
{
case 1:
if(insertViewController == nil)
insertViewController = [[insertView alloc] initWithNibName:#"insertView" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:insertViewController animated:YES];
break;
//[insertViewController release];
}
}
insertviewcontoller.m
#import "insertView.h"
#import "RootViewController.h"
#import "Foundation/Foundation.h"
#define kTabBarHeight 5.0
#define kKeyboardAnimationDuration 1.0
#implementation insertView
#synthesize scroll;
- (void)viewDidLoad {
[super viewDidLoad];
//for scrolling
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification
object:self.view.window];
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:self.view.window];
keyboardIsShown = NO;
//make contentSize bigger than your scrollSize (you will need to figure out for your own use case)
CGSize scrollContentSize = CGSizeMake(320, 345);
self.scroll.contentSize = scrollContentSize;
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillShowNotification
object:nil];
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)keyboardWillHide:(NSNotification *)n
{
NSDictionary* userInfo = [n userInfo];
// get the size of the keyboard
NSValue* boundsValue = [userInfo objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [boundsValue CGRectValue].size;
// resize the scrollview
CGRect viewFrame = self.scroll.frame;
// I'm also subtracting a constant kTabBarHeight because my UIScrollView was offset by the UITabBar so really only the portion of the keyboard that is leftover pass the UITabBar is obscuring my UIScrollView.
viewFrame.size.height += (keyboardSize.height - kTabBarHeight);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
// The kKeyboardAnimationDuration I am using is 0.3
[UIView setAnimationDuration:kKeyboardAnimationDuration];
[self.scroll setFrame:viewFrame];
[UIView commitAnimations];
keyboardIsShown = NO;
}
- (void)keyboardWillShow:(NSNotification *)n
{
// This is an ivar I'm using to ensure that we do not do the frame size adjustment on the UIScrollView if the keyboard is already shown. This can happen if the user, after fixing editing a UITextField, scrolls the resized UIScrollView to another UITextField and attempts to edit the next UITextField. If we were to resize the UIScrollView again, it would be disastrous. NOTE: The keyboard notification will fire even when the keyboard is already shown.
if (keyboardIsShown) {
return;
}
NSDictionary* userInfo = [n userInfo];
// get the size of the keyboard
NSValue* boundsValue = [userInfo objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [boundsValue CGRectValue].size;
// resize the noteView
CGRect viewFrame = self.scroll.frame;
// I'm also subtracting a constant kTabBarHeight because my UIScrollView was offset by the UITabBar so really only the portion of the keyboard that is leftover pass the UITabBar is obscuring my UIScrollView.
viewFrame.size.height -= (keyboardSize.height - kTabBarHeight);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
// The kKeyboardAnimationDuration I am using is 0.3
[UIView setAnimationDuration:kKeyboardAnimationDuration];
[self.scroll setFrame:viewFrame];
[UIView commitAnimations];
keyboardIsShown = YES;
}
- (void)dealloc {
[super dealloc];
[scroll release];
[nmtf release];
[phtf release];
[addtf release];
}

Answer 1

update viewDidLoad method into viewWillAppear:(BOOL)animated in your insertviewcontoller.m page