NSTableView is not updated on [reloadData]
Hi, All,
So, I'm continuing :)
I've connected my NSTableView with AppController (in IB) setting
AppController, as NSTableView's datasource. Then I've added a couple
of methods to the AppController to implement NSTableDataSource protocol:
- (int)numberOfRowsInTableView:(NSTableView *)tableView;
- (id)tableView:(NSTableView *)tableView
objectValueForTableColumn:(NSTableColumn *)tableColumn
row:(int)row;
Also I have a timer in my app, which should recalculate something from
time to time and, as a result of this procedure, table row count (as
well as values) should be updated. onTimer: method is like this one:
- (void)onTimer:(NSTimer*)timer {
//
// here we do some actions, leading to actual changes in the table
content.
//
[myTable reloadData];
}
It all is correct for the first look. Isn't it? Now what is
happening. numberOfRowsInTableView: is called only once, yet before
AppController's awakeFromNib is called. At that moment nothing yet is
initialized (initialization goes in awakeFromNib), so
numberOfRowsInTableView: returns zero.
Nothing happens when [myTable reloadData] is called within onTimer:
procedure. None of delegated methods are called, so my table is always
empty, though new data (of nonzero length) are created.
So, my question is - how to make table view to change its row count
and update the data?
Thanks.
___
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Re: NSTableView is not updated on [reloadData]
On Jul 23, 2009, at 11:21 AM, Alexander Bokovikov wrote: [myTable reloadData]; ... Nothing happens when [myTable reloadData] is called within onTimer: Is your myTable outlet connected to the table view? -- I.S. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSTableView is not updated on [reloadData]
Are you sure
[myTable reloadData];
is being executed? reloadData will cause numberOfRowsInTableView to
be called.
On Jul 23, 2009, at 9:21 AM, Alexander Bokovikov wrote:
Hi, All,
So, I'm continuing :)
I've connected my NSTableView with AppController (in IB) setting
AppController, as NSTableView's datasource. Then I've added a couple
of methods to the AppController to implement NSTableDataSource
protocol:
- (int)numberOfRowsInTableView:(NSTableView *)tableView;
- (id)tableView:(NSTableView *)tableView
objectValueForTableColumn:(NSTableColumn *)tableColumn
row:(int)row;
Also I have a timer in my app, which should recalculate something
from time to time and, as a result of this procedure, table row
count (as well as values) should be updated. onTimer: method is like
this one:
- (void)onTimer:(NSTimer*)timer {
//
// here we do some actions, leading to actual changes in the table
content.
//
[myTable reloadData];
}
It all is correct for the first look. Isn't it? Now what is
happening. numberOfRowsInTableView: is called only once, yet before
AppController's awakeFromNib is called. At that moment nothing yet
is initialized (initialization goes in awakeFromNib), so
numberOfRowsInTableView: returns zero.
Nothing happens when [myTable reloadData] is called within onTimer:
procedure. None of delegated methods are called, so my table is
always empty, though new data (of nonzero length) are created.
So, my question is - how to make table view to change its row count
and update the data?
Thanks.
___
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Re: closed - NSTableView is not updated on [reloadData]
On 23.07.2009, at 21:25, I. Savant wrote: Is your myTable outlet connected to the table view? I'm fool... :( sorry... I was pretty sure it is, but really it isn't. Also I was sure that BAD_ACCESS exception should occur if not initialized outlet is used to send a message to. Fixed it. Thanks for so quick reply! ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: closed - NSTableView is not updated on [reloadData]
On 24/07/2009, at 1:52 AM, Alexander Bokovikov wrote: Also I was sure that BAD_ACCESS exception should occur if not initialized outlet is used to send a message to. Definitely not. Uninitialized outlets are set to nil, and messages to nil are legal - they simply swallow the messages. On t e whole this is much safer than crashing but can lead to the odd bug where nothing happens and you don't immediately know why. --Graham ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: closed - NSTableView is not updated on [reloadData]
Alexander Bokovikov wrote: Also I was sure that BAD_ACCESS exception should occur if not initialized outlet is used to send a message to. An uninitialized outlet is always nil. It is always legal to send messages to nil, although some returned values may be undefined. Re- read the basic docs on messaging, if necessary. It may be illegal to perform other operations with nil, so don't make the opposite mistake of thinking that just because sending a message to nil is legal, so is everything else. -- GG ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
