Re: How many items can add into table view
Re: How many items can add into table view
- Subject: Re: How many items can add into table view
- From: Alastair Houghton <email@hidden>
- Date: Mon, 21 Jan 2008 15:01:19 +0000
On 21 Jan 2008, at 13:23, Gregory Weston wrote:
2 billion or more. Since table views don't store data - only display
it - the number of items is limited to the greatest value of
NSInteger (in 10.5, int earlier).
In practice the limit is somewhat smaller, because (for 32-bit apps at
least), co-ordinates are represented as 32-bit float values. As a
result, you'll start to run out of precision well before your run out
of range in a 32-bit int, which tends to produce interesting graphical
behaviour.
64-bit apps raise these limits, but obviously the limit doesn't go
away (and neither does the problem of it not being sensible to present
that amount of information to the user at once).
To get around the co-ordinate limit, you can implement your own
scrolling code, in which case the number of entries in your table
would just be the number that fit on the screen (and you'd manage
which entries those were with more code). A scrollable table view may
not be the best user interface if this kind of thing is becoming a
problem for you, though.
Kind regards,
Alastair.
--
http://alastairs-place.net
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