Comments on: How To Create A Data Entry Screen

By: bob

bob — Sat, 30 Jul 2011 00:02:06 +0000

[[aView class] isSubclassOfClass:[UIResponder class]]
should be written as
[aView isKindOfClass:[UIResponder class]]

By: Jonathan Sterling

Jonathan Sterling — Tue, 11 May 2010 05:44:33 +0000

@Nick: It’s not standard UI, and it’s just plain ugly.

By: Nick

Nick — Mon, 10 May 2010 03:18:35 +0000

@Jonathan: In some cases a table view makes more sense, i.e. when all data entry fields are uniform in size and type, in other cases I think using a scroll view as described above is a good solution. Would you like to expand on your reasons for “never” making a data entry screen using a scroll view?

By: Jonathan Sterling

Jonathan Sterling — Sun, 09 May 2010 15:55:46 +0000

Stop. Please never make a data entry screen out of fields in a scrollview. Always use a UITableView; also, scrolling is done automatically for you when you do it the way I suggest.

By: Alexander Mardari

Alexander Mardari — Tue, 27 Apr 2010 07:34:23 +0000

EDIT: Add the necessary funcs and variables to your View .h

By: Alexander Mardari

Alexander Mardari — Tue, 27 Apr 2010 07:33:29 +0000

Here is the solution to the snap problem and the code to scroll view down after editing:

//We register for keyboard notifications in View init:
[self registerForKeyboardNotifications];

//Add this func to you View .m
- (void)registerForKeyboardNotifications{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWasHidden:)
name:UIKeyboardDidHideNotification object:nil];
}

//We add a implementation for the return key
- (BOOL)textFieldShouldReturn:(UITextField *)aTextField {
[myScrollView setContentOffset:CGPointMake(0, 0) animated:YES];
return YES;
}

//We move the View resize funcs out of textFieldDidBeginEditing
//The bKeyboardWasShown is for smooth scrolling when the keyboard is already on screen
- (void)keyboardWasShown:(NSNotification*)aNotification{
if(!bKeyboardWasShown){
bKeyboardWasShown=YES;
CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];
myScrollView.contentSize = CGSizeMake(applicationFrame.size.width, applicationFrame.size.height + 216);
}
}

// Called when the UIKeyboardDidHideNotification is sent
- (void)keyboardWasHidden:(NSNotification*)aNotification{
bKeyboardWasShown=NO;
CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];
myScrollView.contentSize = CGSizeMake(applicationFrame.size.width, applicationFrame.size.height);
}

//And finally, add this to scrollViewToCenterOfScreen to check that the view won’t scroll too much down
if (y > 216) {
y = 216;
}

By: Sam

Sam — Sat, 17 Apr 2010 14:58:17 +0000

Thanks for the example you don’t even know how many books and the SDK itself I browsed to even get a little of the knowledge you just dropped. I clipped this into evernote just in case I can’t access your site in the future. Thanks, again, and know that I’m using it.

By: Nick

Nick — Wed, 31 Mar 2010 21:07:33 +0000

@Hardik: The code above is not dependent on portrait or landscape mode. If your screen layout works in both orientations, then this code should work too.

By: Hardik

Hardik — Wed, 31 Mar 2010 09:34:52 +0000

Sir,This is good example
but can u give me document with explanation of each and every ling broadly to understand ur concept

2>Is ur code is working on Portrait,Landscape,Portrait to Landscape and Landscape to portrait mode

By: Cameron

Cameron — Sat, 12 Dec 2009 23:43:07 +0000

And now looking back at my reasoning – after my comment – I see what’s going on. The size of the content inside, not the size of the scrollView, is getting resized. So I understand how that should work, but now I’m back to square one in understanding why it doesn’t work as intended.

Any ideas, Nick?