NSOperation
iOS develop about NSOperationQueue
I know the two ways to get a operation queue as follow: queue1 = [[NSOperationQueue alloc] init]; queue2 = [[NSOperationQueue mainQueue] retain];[详细]
2023-04-12 22:53 分类：问答Executing multiple NSOpeartion synchronously with NSOperationQueue
I have to download multiple files from Server in background process. for this i am using NSOperationQueue. During download i need to maintain when download has started & completed. For this i have[详细]
2023-04-12 20:01 分类：问答Guide need for debugging crash log
#00x345bbc98 in objc_msgSend () #10x35cd3616 in -[_PFManagedObjectReferenceQueue _processReferenceQueue:] ()[详细]
2023-04-12 16:00 分类：问答Create a "call" table : Serialize a Block or NSOperation?
When my app is offline I would like to store some call to the server in order to replay them later when the app goes back online.[详细]
2023-04-12 03:39 分类：问答Is it safe to reference an NSOperation instance and call -isFinished?
I create an NSOperation every time my app launches or resigns active. I need to queue them with dependencies such that two never execute at the same time, but one after another.[详细]
2023-04-05 23:27 分类：问答Managing CPU intensive threads on iOS
I’m an experienced C/C++ programmer coming up to speed on Objective C on the iPhone.I have done a lot of searching, but haven’t found a satisfactory answer on what must be a common question; I apolo[详细]
2023-04-05 04:18 分类：问答How to load content into TableView without blocking the UI?
I\'m working on a TableView which controller downloads data from a web feed, parse开发者_如何学Python and populate its content in this TableView. The feed provides data in chunks of 10 items only. So,[详细]
2023-04-04 10:45 分类：问答iOS how to catch exception unrecognized selector sent to instance when target object is NULL already?
I read alot about what is the problem for exception \"unrecog...\" But i need something else I have view with two buttons: Start and Delete, also i have two UILabels: oneLabel and secondLabel[详细]
2023-04-04 07:42 分类：问答NSOperationQueue and UITableView release is crashing my app
This is by far the weirdest problem I\'ve been stuck with. I have a UIViewController on a UINavigationController and I want to call a method at viewDidAppear using NSInvocationOperation so it can run[详细]
2023-04-02 23:41 分类：问答Marking custom subclass of NSOperation as terminated?
I\'ve created a custom subclass of NSOperation and I\'ve overwritten the main method. @interface WGTask : NSOperation[详细]
2023-04-02 05:47 分类：问答
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