Re: Prevent windows from opening multiple times
Re: Prevent windows from opening multiple times
- Subject: Re: Prevent windows from opening multiple times
- From: John Joyce <email@hidden>
- Date: Fri, 21 Jan 2011 14:34:00 -0600
On Jan 21, 2011, at 2:27 PM, Quincey Morris wrote:
> On Jan 21, 2011, at 10:48, Luc Van Bogaert wrote:
>
>> Instead of using a local pointer variable in the action method to open the window, I thought about using an instance variable in my app delegate to hold a pointer to the windowcontroller object, and check its existance before opening the window. However, trying this failed, as now I can open and close the window just once, and the app crashes on subsequent attempts to open the window.
>
> Your approach is correct, so you have a bug in your implementation -- most likely a memory management error. You need to track this down like any other (likely) overrelease problem. If you post backtraces from the crash and/or relevant source, I'm sure people will be happy to help isolate what's gone wrong.
Check your settings for the window in Interface Builder...
don't change the defaults for
Behavior : Release when closed (YES)
Memory : Deferred (YES)
Buffered
...unless you really know why you are changing them...
you can get this crashing behavior with have fiddled with these..._______________________________________________
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