Re: NSTableView _dataSourceValueForColumn:row: failure
On Mar 11, 2010, at 7:55 PM, Alexander Bokovikov wrote:
On 11.03.2010, at 23:25, Corbin Dunn wrote:
http://www.corbinstreehouse.com/blog/2008/08/your-most-important-breakpoint-in-cocoa/
I've done what was told there. No difference. I just get EXC_BAD_ACCESS in
XCode status line and debugger's call stack list shows:
objc_msgSend
- [NSTableView _dataSourceValueForColumn:row: ]
and a long chain is below, but there are no my project lines there. All
lines are from Cocoa itself. It looks like the window requires for update
after dataSource is already released.
it still could be caused by something you did. It is hard to say! I'd have to
see the bt (like I mentioned earlier).
This is how I call the modal window:
- (void) doModalWnd{
MyWnd *wnd = [[MyWnd alloc] init];
[[NSApplication sharedApplication] runModalForWindow:[wnd window]];
[wnd release];
}
- (IBAction) myBtnClick:(NSButton *)sender {
[self performSelector:@selector(doModalWnd)
withObject:nil
afterDelay:0];
}
There is such code within MyWnd.m:
- (void)windowWillClose:(NSNotification *)notification {
[[NSApplication sharedApplication] stopModalWithCode:NSCancelButton];
}
Is there anything criminal here?
something's causing something to redraw the table after your datasource was
dealloced. Just call [tableView setDatasource:nil] in your datasourc'es
dealloc. That will probably fix the issue.
.corbin
Thanks.
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NSTableView _dataSourceValueForColumn:row: failure
Hi, All. I have a table view in the main window, where it works fine. And have yet another very similar table view in a popup modal panel. where it fails immediately after panel is closed. Debugger shows subj, as the failure point. In both cases dataSource for table view is assigned in the IB statically. The problem disappears if I clear dataSource assignment in the IB and include this assignment into awakeFromNib of the window controller. Also I include [myTableView setDataSource:nil] into -windowWillClose event handler of the same window controller. I tried to manipulate with release when closed option of the window - no effect. What it could be? Thanks. ___ 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 _dataSourceValueForColumn:row: failure
On 11 Mar 2010, at 9:38 AM, Alexander Bokovikov wrote: I have a table view in the main window, where it works fine. And have yet another very similar table view in a popup modal panel. where it fails immediately after panel is closed. Debugger shows subj, as the failure point. In both cases dataSource for table view is assigned in the IB statically. 1. You don't say what fail means. A crash? What error code? What stack trace? 2. This is all moot, because, as the leading underscore shows, _dataSourceValueForColumn:row: is a private method. It is not meant to be called by anyone but Apple. It is likely that only Apple knows what the preconditions and postconditions for calling it are; and they can change those conditions at any time. I Googled _dataSourceValueForColumn:. Have you noticed that virtually all the hits have titles like Arbitrary Crashes, Bug, Consistently crashes, issue, crashes everytime, Crash in my... data source? 3. Now that I re-read your message, you don't say whether you're implementing _dataSourceValueForColumn:row: or calling it; or even whether you're using it at all. Even if you're just implementing it, the principle holds: You don't know what the method is required to do, and you don't know what it will be required to do in 10.6.3. (Note for archives: The current version of Mac OS X is 10.6.2.) What are you trying to accomplish, and why do you think it cannot be done with supported API? — F ___ 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 _dataSourceValueForColumn:row: failure
On Mar 11, 2010, at 7:38 AM, Alexander Bokovikov wrote: Hi, All. I have a table view in the main window, where it works fine. And have yet another very similar table view in a popup modal panel. where it fails immediately after panel is closed. Debugger shows subj, as the failure point. In both cases dataSource for table view is assigned in the IB statically. The problem disappears if I clear dataSource assignment in the IB and include this assignment into awakeFromNib of the window controller. Also I include [myTableView setDataSource:nil] into -windowWillClose event handler of the same window controller. I tried to manipulate with release when closed option of the window - no effect. What it could be? Break on objc_exception_throw. corbin ___ 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 _dataSourceValueForColumn:row: failure
On Thursday, March 11, 2010 at 10:11 PM Fritz Anderson wrote: 1. You don't say what fail means. A crash? What error code? What stack trace? EXC_BAD_ACCESS. Assembler call stack view shows line next to the subj call. OS X 10.5.8 Never tried it in 10.6.X 2. This is all moot, because, as the leading underscore shows, _dataSourceValueForColumn:row: is a private method. It is not meant to be called by anyone but Apple. It is likely that only Apple knows what the preconditions and postconditions for calling it are; and they can change those conditions at any time. Of couse, I never called it directly. I never implemented it. I just _use_ NSTableView. Nothing more. The fact is that it is working nice in the main app, where it is never destroyed explicitly. But it doesn't work correctly in a modal window, which I create and then release. As I've described the only way I've found is to assign the datasource explicitly in awakeFromNib and set it to nil explicitly in windowWillClose handler. Really my question was - is this a known bug, a feature or my mistake? Thanks. ___ 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 _dataSourceValueForColumn:row: failure
On Thursday, March 11, 2010 at 10:29 PM Corbin Dunn wrote: Break on objc_exception_throw. Could you explain it? What does it mean? Thanks. ___ 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 _dataSourceValueForColumn:row: failure
On 11 Mar 2010, at 11:44 AM, Alexander Bokovikov wrote: Of couse, I never called it directly. I never implemented it. I just _use_ NSTableView. Nothing more. The fact is that it is working nice in the main app, where it is never destroyed explicitly. But it doesn't work correctly in a modal window, which I create and then release. As I've described the only way I've found is to assign the datasource explicitly in awakeFromNib and set it to nil explicitly in windowWillClose handler. I misunderstood. My mistake. Have you run with zombies enabled? It's almost the first thing you should do if you get an EXC_BAD_ACCESS in framework code. Also, be sure Run Stop on Objective-C Exceptions is checked. — F ___ 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 _dataSourceValueForColumn:row: failure
On Mar 11, 2010, at 10:44 AM, Alexander Bokovikov wrote: Of couse, I never called it directly. I never implemented it. I just _use_ NSTableView. Nothing more. The fact is that it is working nice in the main app, where it is never destroyed explicitly. But it doesn't work correctly in a modal window, which I create and then release. As I've described the only way I've found is to assign the datasource explicitly in awakeFromNib and set it to nil explicitly in windowWillClose handler. Really my question was - is this a known bug, a feature or my mistake? Alexander, This seems to describe that you are releasing the datasource before the tableview that uses it is released [possibly by over-releasing it, as I would assume the tableview would retain it, but it may not]. Maybe make sure your window is released before the source is released. Or at the very least, that the window is closed/offscreen before the source is released. Eli ___ 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 _dataSourceValueForColumn:row: failure
On Mar 11, 2010, at 9:48 AM, Alexander Bokovikov wrote: On Thursday, March 11, 2010 at 10:29 PM Corbin Dunn wrote: Break on objc_exception_throw. Could you explain it? What does it mean? http://www.corbinstreehouse.com/blog/2008/08/your-most-important-breakpoint-in-cocoa/ corbin ___ 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 _dataSourceValueForColumn:row: failure
On Mar 11, 2010, at 9:44 AM, Alexander Bokovikov wrote: On Thursday, March 11, 2010 at 10:11 PM Fritz Anderson wrote: 1. You don't say what fail means. A crash? What error code? What stack trace? EXC_BAD_ACCESS. Assembler call stack view shows line next to the subj call. OS X 10.5.8 Never tried it in 10.6.X 2. This is all moot, because, as the leading underscore shows, _dataSourceValueForColumn:row: is a private method. It is not meant to be called by anyone but Apple. It is likely that only Apple knows what the preconditions and postconditions for calling it are; and they can change those conditions at any time. Of couse, I never called it directly. I never implemented it. I just _use_ NSTableView. Nothing more. The fact is that it is working nice in the main app, where it is never destroyed explicitly. But it doesn't work correctly in a modal window, which I create and then release. As I've described the only way I've found is to assign the datasource explicitly in awakeFromNib and set it to nil explicitly in windowWillClose handler. Really my question was - is this a known bug, a feature or my mistake? Howdy! We would really need to see a backtrace at the point of the crash or exception being thrown. It is probably a bug in your app. corbin ___ 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 _dataSourceValueForColumn:row: failure
On 11.03.2010, at 23:25, Corbin Dunn wrote:
http://www.corbinstreehouse.com/blog/2008/08/your-most-important-breakpoint-in-cocoa/
I've done what was told there. No difference. I just get
EXC_BAD_ACCESS in XCode status line and debugger's call stack list
shows:
objc_msgSend
- [NSTableView _dataSourceValueForColumn:row: ]
and a long chain is below, but there are no my project lines there.
All lines are from Cocoa itself. It looks like the window requires for
update after dataSource is already released.
This is how I call the modal window:
- (void) doModalWnd{
MyWnd *wnd = [[MyWnd alloc] init];
[[NSApplication sharedApplication] runModalForWindow:[wnd window]];
[wnd release];
}
- (IBAction) myBtnClick:(NSButton *)sender {
[self performSelector:@selector(doModalWnd)
withObject:nil
afterDelay:0];
}
There is such code within MyWnd.m:
- (void)windowWillClose:(NSNotification *)notification {
[[NSApplication sharedApplication] stopModalWithCode:NSCancelButton];
}
Is there anything criminal here?
Thanks.
___
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Re: NSTableView _dataSourceValueForColumn:row: failure
On Mar 11, 2010, at 8:55 PM, Alexander Bokovikov wrote: Is there anything criminal here? Is the datasource for the NSTableView still a valid, non-released object when the window is closed? Eli ___ 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
