Multiple NSOperationQueues?

Posted by Infinity on Stack Overflow See other posts from Stack Overflow or by Infinity
Published on 2010-04-08T09:39:03Z Indexed on 2010/04/08 9:43 UTC
Read the original article Hit count: 468

Filed under:

nsoperation

|

nsoperationqueue

|

objective-c

|

iphone-sdk-3.0

Hello!

I would like to use NSOperations in my application to resolve threading problems. I have read some tutorials and now I know what I have to do, but I have a problem. There is a must to have the same NSOperationQueue in each class. What if I use a new NSOperationQueue in each class. There will be concurrency problems?

© Stack Overflow or respective owner

Related posts about nsoperation

NSOperationQueue bug with dependencies

as seen on Stack Overflow - Search for 'Stack Overflow'
I am using NSOperation and NSOperationQueue for performing a sequence of operations, all dependent on each other (2 on 1, 3 on 2, etc...). I set the dependency after I create the operations. I am encountering problems when the queue completes: the program crashes in the _release part of the code… >>> More
Removing NSOperation from queue when view changes.

as seen on Stack Overflow - Search for 'Stack Overflow'
I am creating an application which involves so many web-service calls. I am using NSOperation to execute the web-service calls. There are several views in the application and I'm calling the web-service each time the view loads. Since it is navigation, if user decides to go back to the previous view… >>> More
NSOperation and UIKit problem

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello guys! I am doing my download with an object which was inherited from NSOperation. I have read the documentation and when my operation finished I must call the [self.delegate performSelectorOnMainThread:@selector(operationDidFinish:) withObject:self waitUntilDone:YES]; method. It needs to… >>> More
NSOperation and fwrite (Iphone)

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am having problem with this code.Basically I want to execute the fwrite from a timer function asyncronusly. Here is the code block in my Timer function. (This will call by the timer every 0.2 seconds. -(void)timerFunction { WriteFileOperation * operation = [WriteFileOperation… >>> More
Perform selector on parent NSOperation

as seen on Stack Overflow - Search for 'Stack Overflow'
I extend NSOperation (call it A) which contains NSOperationQueue for other NSOperations (which is another extended class different from A, call these operations B). When operation A is running (executing B operations) how do i call a specific function/method on operation A when certain event takes… >>> More

Related posts about nsoperationqueue

iPhone: NSOperationQueue running operations serially

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a singleton NSOperationQueue that handles all of my network requests. I'm noticing, however, that when I have one particularly long operation running (this particular operation takes at least 25 seconds), my other operations don't run until it completes. maxConcurrentOperationCount is set… >>> More
Receive data in same order as that of NSOperationQueue

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I have an NSOperationQueue, in which I keep on adding NSOperation objects that hit server and brings data. Is there a way to store the received data in the order in which they were fired? For example, suppose the A, B and C objects are added in NSOperationQueue in the order ABC. Now each of the… >>> More
NSThread vs. NSOperationQueue vs. ??? on the iPhone

as seen on Stack Overflow - Search for 'Stack Overflow'
Currently I'm using NSThread to cache images in another thread. [NSThread detachNewThreadSelector:@selector(cacheImage:) toTarget:self withObject:image]; Alternatively: [self performSelectorInBackground:@selector(cacheImage:) withObject:image]; Alternatively, I can use an NSOperationQueue NSInvocationOperation… >>> More
iPhone: Memory leak when using NSOperationQueue...

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm sitting here for at least half an hour to find a memory leak in my code. I just replaced an synchronous call to a (touch) method with an asynchronous one using NSOperationQueue. The Leak Inspector reports a memory leak after I did the change to the code. What's wrong with the version using… >>> More
GCD and AppleEvents / NSOperationQueue and AppleScript

as seen on Stack Overflow - Search for 'Stack Overflow'
As i understood, the threads provided by GCD do have a runloop but no source/port. Now i use some of methods that call AppleScripts thru AppleEvents inside an NSOperationQueue. And sometimes my app crashes with following stacktrace. my questions: Usage of AppleScript inside a NSInvocationOperation… >>> More