Re: Beachball on Lengthy Task
Re: Beachball on Lengthy Task
- Subject: Re: Beachball on Lengthy Task
- From: Pierce Freeman <email@hidden>
- Date: Sun, 05 Apr 2009 11:18:14 -0700
- Thread-topic: Beachball on Lengthy Task
Stuart:
That sounds like it could work, however, pointed out by someone else - I
think NSFileHandle's readToEndOfFileInBackgroundAndNotify could work better
as I am dealing with reading files.
On 4/4/09 8:45 PM, "Stuart Malin" <email@hidden> wrote:
>
> On Apr 4, 2009, at 5:36 PM, Pierce Freeman wrote:
>
>>> And, if you are 10.5 only, there's also NSObject's
>>> performSelectorInBackground:withObject:
>>
>> Is this a timer or a thread creator? I don't believe it has inputs
>> for the
>> time, or could it just do it automatically? Also, is there some way
>> I can
>> make this work with a function already created?
>
> That is a thread creator. It will initiate the specified selector of
> the receiver (the invoked object). You can pass a single object to it;
> that object can, of course, contain references to other objects.
>
> Please be careful to distinguish "method" from "function." If you
> meant an Objective-C method, yes, it will work with that. If you meant
> a C function, then no, it will not work, at least not directly, but in
> such case it would be easy to create a method that called the function.
>
> Note: as has already been pointed out, you must be very careful
> regarding thread safety. A background thread task must carefully
> constrain which objects it instantiates and methods used to those that
> are thread safe. Certainly no U/I.
>
> Read the cited references, and additional material germane to these.
>
> btw: by any stretch of the imagination, I'm not an expert with threads.
>
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