NSOperation
NSBlockOperation and NSAutoreleasePool
Normally when you create an NSOperation su开发者_开发百科bclass you are responsible for creating and releasing an NSAutoreleasePool in the -main method.[详细]
2023-02-13 09:52 分类:问答How to queue requests when underlying framework does not support queueing?
I feel my question is really n00b; apologies if I don\'t word it clearly :/ In my project I\'m using a 3rd party framework that fetches some data for me using asynchronous NSURLRequests (RESTful API)[详细]
2023-02-11 08:34 分类:问答NSOperation performance
I am trying to server side connection on a background thread us开发者_C百科ing NSOperation. I didn\'t want to subclass NSOperation ..So how can use NSOperation and how to return response from NSOperat[详细]
2023-02-10 10:31 分类:问答how to cancel out of operation created with addOperationWithBlock?
I\'m using NSOperationQueue\'s addOperationWithBlock.From within the block, how do I check to see if I\'m supposed to cancel the operation?Or access any NSOperation properties/methods?[详细]
2023-02-10 07:10 分类:问答NSOperation exists on NSOperationQueue
Does anyone know a way of telling if an NSOperation is already on a NSOperationQueue without having to actually get the list of operations and compare with each of the items?[详细]
2023-02-09 17:55 分类:问答Display of results is delayed by 5s in UISearchDisplayController
My UISearchDisplayController performs asynchronous searches via NSOperationQueue. However the results table does not visually update until approximately 5s after the NSOperation calls [searchDisplayC[详细]
2023-02-09 16:57 分类:问答EXC_BAD_ACCESS while adding data to array, using 2 NSOperations simultaneously
I have: 1) Starting 2 asynchron NSUrlRequests simultaneously 2) As soon as one of the two requests has loaded XML data, an NSOperationQueue is used to start a XML parser. Hereby, the ParseOperations[详细]
2023-02-09 04:51 分类:问答Constantly growing memory allocation while fetching images over HTTP in iOS
I am implementing an iOS App that needs to fetch a huge amount of images over HTTP. I\'ve tried several approaches but independently what I do, Instuments shows constantly increasing memory allocation[详细]
2023-02-08 20:04 分类:问答Updating UI in Cocoa from another .m file
I have a GUI app that has a main thread and then I use NSOperation to run 2 other threads once the user clicks the Start button. Now one thread calculates a certain value and updates it. What I want t[详细]
2023-02-08 10:05 分类:问答Using NSOperation is curiously slow
I\'m dealing with a problem here. There\'s this view that I use to see thumbnails of a document in my app. Since loading the thumbnails slowed the main thread, I looked for workarounds and ended up on[详细]
2023-02-08 02:44 分类:问答